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    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xlink:label="loc_us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_1465"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xlink:label="loc_us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_1466"/>
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xlink:label="loc_us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_1467"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_country_US_0" xml:lang="en-US">UNITED STATES</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_country_US_1" xml:lang="en-US">United States ("US")</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_country_US_2" xml:lang="en-US">US</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_AmendmentFlag_0" xml:lang="en-US">Amendment Flag</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_CityAreaCode_0" xml:lang="en-US">City Area Code</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_CoverAbstract_0" xml:lang="en-US">Cover [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_dei_CoverAbstract_1" xml:lang="en-US">CURRENT ASSETS</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_CurrentFiscalYearEndDate_0" xml:lang="en-US">Current Fiscal Year End Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_DocumentFiscalPeriodFocus_0" xml:lang="en-US">Document Fiscal Period Focus</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_DocumentFiscalYearFocus_0" xml:lang="en-US">Document Fiscal Year Focus</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_DocumentPeriodEndDate_0" xml:lang="en-US">Document Period End Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_DocumentQuarterlyReport_0" xml:lang="en-US">Document Quarterly Report</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_DocumentTransitionReport_0" xml:lang="en-US">Document Transition Report</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_DocumentType_0" xml:lang="en-US">Document Type</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityAddressAddressLine1_0" xml:lang="en-US">Entity Address, Address Line One</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityAddressAddressLine2_0" xml:lang="en-US">Entity Address, Address Line Two</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityAddressCityOrTown_0" xml:lang="en-US">Entity Address, City or Town</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityAddressCountry_0" xml:lang="en-US">Entity Address, Country</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityAddressPostalZipCode_0" xml:lang="en-US">Entity Address, Postal Zip Code</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityAddressStateOrProvince_0" xml:lang="en-US">Entity Address, State or Province</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityCentralIndexKey_0" xml:lang="en-US">Entity Central Index Key</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityCommonStockSharesOutstanding_0" xml:lang="en-US">Entity Common Stock, Shares Outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityCurrentReportingStatus_0" xml:lang="en-US">Entity Current Reporting Status</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityEmergingGrowthCompany_0" xml:lang="en-US">Entity Emerging Growth Company</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityExTransitionPeriod_0" xml:lang="en-US">Entity Ex Transition Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityFileNumber_0" xml:lang="en-US">Entity File Number</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityFilerCategory_0" xml:lang="en-US">Entity Filer Category</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityIncorporationStateCountryCode_0" xml:lang="en-US">Entity Incorporation, State or Country Code</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityInteractiveDataCurrent_0" xml:lang="en-US">Entity Interactive Data Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityRegistrantName_0" xml:lang="en-US">Entity Registrant Name</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityShellCompany_0" xml:lang="en-US">Entity Shell Company</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntitySmallBusiness_0" xml:lang="en-US">Entity Small Business</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityTaxIdentificationNumber_0" xml:lang="en-US">Entity Tax Identification Number</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_LocalPhoneNumber_0" xml:lang="en-US">Local Phone Number</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_Security12bTitle_0" xml:lang="en-US">Title of 12(b) Security</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_SecurityExchangeName_0" xml:lang="en-US">Security Exchange Name</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_TradingSymbol_0" xml:lang="en-US">Trading Symbol</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_AbandonmentCosts_0" xml:lang="en-US">Represents costs associated with abandonment.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_AbandonmentCosts_1" xml:lang="en-US">Abandonment Costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_AbandonmentCosts_2" xml:lang="en-US">Abandonment costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_AccretionOfRedeemableConvertiblePreferredStock_0" xml:lang="en-US">Represents the amount of accretion of redeemable convertible preferred stock.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_AccretionOfRedeemableConvertiblePreferredStock_1" xml:lang="en-US">Accretion Of Redeemable Convertible Preferred Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_AccretionOfRedeemableConvertiblePreferredStock_2" xml:lang="en-US">Accretion of redeemable convertible preferred stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_AdditionsToDeferredContractAcquisitionCostsDuringPeriod_0" xml:lang="en-US">Additions to deferred contract acquisition costs during the period.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_AdditionsToDeferredContractAcquisitionCostsDuringPeriod_1" xml:lang="en-US">Additions To Deferred Contract Acquisition Costs During Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_AdditionsToDeferredContractAcquisitionCostsDuringPeriod_2" xml:lang="en-US">Additions to deferred contract acquisition costs during the period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_AdditionsToDeferredCostsToFulfillContractDuringPeriod_0" xml:lang="en-US">Additions to deferred costs to fulfill a contract during the period.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_AdditionsToDeferredCostsToFulfillContractDuringPeriod_1" xml:lang="en-US">Additions To Deferred Costs To Fulfill Contract During Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_AdditionsToDeferredCostsToFulfillContractDuringPeriod_2" xml:lang="en-US">Additions to deferred costs to fulfill a contract during the period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_AlternateBaseRateMember_0" xml:lang="en-US">Alternate Base Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_AlternateBaseRateMember_1" xml:lang="en-US">Alternate Base Rate [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_AlternateBaseRateMember_2" xml:lang="en-US">Alternate Base Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_AmendmentToCreditAgreementMember_0" xml:lang="en-US">Amendment to the Credit Agreement.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_AmendmentToCreditAgreementMember_1" xml:lang="en-US">Amendment To Credit Agreement [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_AmendmentToCreditAgreementMember_2" xml:lang="en-US">Amendment To Credit Agreement</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_AmortizationOfDeferredCostsToFulfillContract_0" xml:lang="en-US">Amortization of deferred costs to fulfill a contract.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_kltr_AmortizationOfDeferredCostsToFulfillContract_1" xml:lang="en-US">Amortization of deferred costs to fulfill a contract</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_AmortizationOfDeferredCostsToFulfillContract_2" xml:lang="en-US">Amortization Of Deferred Costs To Fulfill Contract</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_AmountOfMinimumNonCancellableRevenueCommitments_0" xml:lang="en-US">Represents amount of minimum non-cancellable revenue commitments.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_AmountOfMinimumNonCancellableRevenueCommitments_1" xml:lang="en-US">Amount Of Minimum Non Cancellable Revenue Commitments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_AmountOfMinimumNonCancellableRevenueCommitments_2" xml:lang="en-US">Amount of minimum non-cancellable revenue commitments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_BankFees_0" xml:lang="en-US">Represents amount of Bank fees.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_BankFees_1" xml:lang="en-US">Bank Fees</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_BankFees_2" xml:lang="en-US">Bank fees</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_BusinessAbstract_0" xml:lang="en-US">Business [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_CashPaidForInterest_0" xml:lang="en-US">Represents the amount of cash paid for interest.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_CashPaidForInterest_1" xml:lang="en-US">Cash Paid For Interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_CashPaidForInterest_2" xml:lang="en-US">Cash paid for interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_CashPaymentsInConnectionWithClosingOfIpo_0" xml:lang="en-US">Represents the amount related to cash payments in connection with closing of IPO.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_CashPaymentsInConnectionWithClosingOfIpo_1" xml:lang="en-US">Cash Payments In Connection With Closing Of Ipo</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_CashPaymentsInConnectionWithClosingOfIpo_2" xml:lang="en-US">Cash payment to SSIG in connection with closing of the IPO</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_ChangeInFairValueOfWarrantLiabilities_0" xml:lang="en-US">It represents change in fair value of warrant liabilities.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_ChangeInFairValueOfWarrantLiabilities_1" xml:lang="en-US">Change In Fair Value Of Warrant Liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_ChangeInFairValueOfWarrantLiabilities_2" xml:lang="en-US">Change in fair value of warrant liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_ChangeInValuationOfWarrantsToPurchasePreferredAndCommonStock_0" xml:lang="en-US">Represents amount of Change in valuation of warrants to purchase preferred and common stock.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_ChangeInValuationOfWarrantsToPurchasePreferredAndCommonStock_1" xml:lang="en-US">Change In Valuation Of Warrants To Purchase Preferred And Common Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_ChangeInValuationOfWarrantsToPurchasePreferredAndCommonStock_2" xml:lang="en-US">Change in valuation of warrants to purchase preferred and common stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_CommitmentsAndContingenciesLineItems_0" xml:lang="en-US">Line item represents information of commitments and Contingencies.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_CommitmentsAndContingenciesLineItems_1" xml:lang="en-US">Commitments And Contingencies [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_CommitmentsAndContingenciesTable_0" xml:lang="en-US">Represents information of commitments and Contingencies.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_CommitmentsAndContingenciesTable_1" xml:lang="en-US">Commitments And Contingencies [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_CondensedConsolidatedBalanceSheetComponentsAbstract_0" xml:lang="en-US">Condensed Consolidated Balance Sheet Components [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_ConversionOfConvertibleAndRedeemableConvertiblePreferredStockToCommonStockUponInitialPublicOffering_0" xml:lang="en-US">Conversion of convertible and redeemable convertible preferred stock to common stock upon initial public offering</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_ConversionOfConvertibleAndRedeemableConvertiblePreferredStockToCommonStockUponInitialPublicOffering_1" xml:lang="en-US">Conversion Of Convertible And Redeemable Convertible Preferred Stock To Common Stock Upon Initial Public Offering</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_ConversionOfConvertibleAndRedeemableConvertiblePreferredStockToCommonStockUponInitialPublicOffering_2" xml:lang="en-US">Conversion of convertible and redeemable convertible preferred stock to common stock upon initial public offering</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_CostsToFulfillContractMember_0" xml:lang="en-US">This member stands for Costs to Fulfill a Contract</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_CostsToFulfillContractMember_1" xml:lang="en-US">Costs To Fulfill Contract [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_CostsToFulfillContractMember_2" xml:lang="en-US">Costs to Fulfill a Contract</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_CostsToObtainContractMember_0" xml:lang="en-US">This member stands for costs to Obtain Contract.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_CostsToObtainContractMember_1" xml:lang="en-US">Costs To Obtain Contract [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_CostsToObtainContractMember_2" xml:lang="en-US">Costs to Obtain a Contract</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_DebtInstrumentFloorRate_0" xml:lang="en-US">Represents the floor rate of debt instrument.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_DebtInstrumentFloorRate_1" xml:lang="en-US">Debt Instrument, Floor Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_DebtInstrumentFloorRate_2" xml:lang="en-US">Floor rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_DeferredContractAcquisitionCostsCurrentAndNoncurrent_0" xml:lang="en-US">Amount of deferred acquisition cost, classified as current and noncurrent.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_DeferredContractAcquisitionCostsCurrentAndNoncurrent_1" xml:lang="en-US">Deferred Contract Acquisition Costs Current And Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_kltr_DeferredContractAcquisitionCostsCurrentAndNoncurrent_2" xml:lang="en-US">Total deferred costs to obtain a contract</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_DeferredCostsToFulfillContractBalanceAfterAdoptionOfAccountingStandard606_0" xml:lang="en-US">Costs to fulfill a contract, balance after the adoption of ASC 606.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="lab_kltr_DeferredCostsToFulfillContractBalanceAfterAdoptionOfAccountingStandard606_1" xml:lang="en-US">Deferred costs to fulfill contract, ending balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="lab_kltr_DeferredCostsToFulfillContractBalanceAfterAdoptionOfAccountingStandard606_2" xml:lang="en-US">Deferred costs to fulfill contract, beginning balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_DeferredCostsToFulfillContractBalanceAfterAdoptionOfAccountingStandard606_3" xml:lang="en-US">Deferred Costs To Fulfill Contract Balance After Adoption Of Accounting Standard 606</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_DeferredCostsToFulfillContractCurrentAndNoncurrent_0" xml:lang="en-US">Total deferred costs to fulfill a contract classified as current and noncurrent.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_DeferredCostsToFulfillContractCurrentAndNoncurrent_1" xml:lang="en-US">Deferred Costs To Fulfill Contract Current And Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_kltr_DeferredCostsToFulfillContractCurrentAndNoncurrent_2" xml:lang="en-US">Total deferred costs to fulfill a contract</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_DeferredCostsToObtainContractBalanceAfterAdoptionOfAccountingStandard606_0" xml:lang="en-US">Amount of deferred costs to obtain contract after the adoption of ASC 606.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="lab_kltr_DeferredCostsToObtainContractBalanceAfterAdoptionOfAccountingStandard606_1" xml:lang="en-US">Costs to obtain a contract, ending balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="lab_kltr_DeferredCostsToObtainContractBalanceAfterAdoptionOfAccountingStandard606_2" xml:lang="en-US">Costs to obtain a contract, beginning balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_DeferredCostsToObtainContractBalanceAfterAdoptionOfAccountingStandard606_3" xml:lang="en-US">Deferred Costs To Obtain Contract Balance After Adoption Of Accounting Standard 606</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_DeferredCostsToObtainContractCurrent_0" xml:lang="en-US">Deferred Costs To Obtain Contract Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_DeferredCostsToObtainContractCurrent_1" xml:lang="en-US">Deferred contract acquisition costs, current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_DeferredCostsToObtainContractNoncurrent_0" xml:lang="en-US">Amount of deferred cost to obtain a contract, classified as noncurrent.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_DeferredCostsToObtainContractNoncurrent_1" xml:lang="en-US">Deferred Costs To Obtain Contract Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_DeferredCostsToObtainContractNoncurrent_2" xml:lang="en-US">Deferred contract acquisition costs, noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_DeferredFulfillmentCostsCurrent_0" xml:lang="en-US">Amount of Deferred fulfillment costs, classified as current.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_DeferredFulfillmentCostsCurrent_1" xml:lang="en-US">Deferred Fulfillment Costs Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_DeferredFulfillmentCostsCurrent_2" xml:lang="en-US">Deferred fulfillment costs, current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_DeferredFulfillmentCostsNoncurrent_0" xml:lang="en-US">Amount of deferred fulfillment costs, classified as noncurrent.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_DeferredFulfillmentCostsNoncurrent_1" xml:lang="en-US">Deferred Fulfillment Costs Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_DeferredFulfillmentCostsNoncurrent_2" xml:lang="en-US">Deferred fulfillment costs, noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_DocumentAndEntityInformationAbstract_0" xml:lang="en-US">Document And Entity Information [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_DocumentAndEntityInformationAbstract_1" xml:lang="en-US">CURRENT ASSETS</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_EnterpriseEducationAndTechnologyMember_0" xml:lang="en-US">This member stands for enterprise, education and technology.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="lab_kltr_EnterpriseEducationAndTechnologyMember_1" xml:lang="en-US">Customer B (EE&amp;T)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_EnterpriseEducationAndTechnologyMember_2" xml:lang="en-US">Enterprise, Education And Technology [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_EnterpriseEducationAndTechnologyMember_3" xml:lang="en-US">Customer B (Enterprise, Education &amp; Technology)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_EnterpriseEducationAndTechnologyMember_4" xml:lang="en-US">Enterprise, Education &amp; Technology</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_EquityIncentivePlan2017Member_0" xml:lang="en-US">2017 Equity Incentive Plan</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_EquityIncentivePlan2017Member_1" xml:lang="en-US">Equity Incentive Plan 2017 [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_EquityIncentivePlan2017Member_2" xml:lang="en-US">2017 Equity Incentive Plan</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_EquityIncentivePlanTwoZeroTwoOneMember_0" xml:lang="en-US">2021 Equity Incentive Plan</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_EquityIncentivePlanTwoZeroTwoOneMember_1" xml:lang="en-US">Equity Incentive Plan Two Zero Two One [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_EquityIncentivePlanTwoZeroTwoOneMember_2" xml:lang="en-US">2021 Equity Incentive Plan</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_ExpensesOnForgivenessOfLoans_0" xml:lang="en-US">The amount of expenses on forgiveness of the loans.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_ExpensesOnForgivenessOfLoans_1" xml:lang="en-US">Expenses On Forgiveness Of Loans</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_ExpensesOnForgivenessOfLoans_2" xml:lang="en-US">Expenses on forgiveness of loans</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_FederalFundsEffectiveRateMember_0" xml:lang="en-US">Federal Funds Effective Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_FederalFundsEffectiveRateMember_1" xml:lang="en-US">Federal Funds Effective Rate [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_FederalFundsEffectiveRateMember_2" xml:lang="en-US">Federal Funds Effective Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_FinancialExpenses_0" xml:lang="en-US">Represents amount of financial expenses.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:label="lab_kltr_FinancialExpenses_1" xml:lang="en-US">Financial expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_FinancialExpenses_2" xml:lang="en-US">Financial Expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_kltr_FinancialExpenses_3" xml:lang="en-US">Financial expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_FinancialExpenses_4" xml:lang="en-US">Financial expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_FinancialExpensesAbstract_0" xml:lang="en-US">Financial Expenses [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_FinancialExpensesAbstract_1" xml:lang="en-US">Financial expenses:</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_FinancialIncome_0" xml:lang="en-US">Represents the amount of financial income.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_FinancialIncome_1" xml:lang="en-US">Financial Income</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_kltr_FinancialIncome_2" xml:lang="en-US">Financial income</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_FinancialIncome_3" xml:lang="en-US">Financial income</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_FinancialIncomeAbstract_0" xml:lang="en-US">Financial Income [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_FinancialIncomeAbstract_1" xml:lang="en-US">Financial income:</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_FinancialIncomeExpensesNet_0" xml:lang="en-US">Represents the amount of Financial expenses, net.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_FinancialIncomeExpensesNet_1" xml:lang="en-US">Financial Income Expenses Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_FinancialIncomeExpensesTableTextBlock_0" xml:lang="en-US">Tabular disclosure of financial income expenses.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_FinancialIncomeExpensesTableTextBlock_1" xml:lang="en-US">Financial Income Expenses [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_FinancialIncomeExpensesTableTextBlock_2" xml:lang="en-US">Schedule of financial income expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_FiniteLivedIntangibleAssetExpectedAmortizationYearFiveAndAfterYearFive_0" xml:lang="en-US">Finite Lived Intangible Asset, Expected Amortization, Year Five And After Year Five</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_FiniteLivedIntangibleAssetExpectedAmortizationYearFiveAndAfterYearFive_1" xml:lang="en-US">Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in and after fifth fiscal year following current fiscal year.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_FiniteLivedIntangibleAssetExpectedAmortizationYearFiveAndAfterYearFive_2" xml:lang="en-US">2026 and thereafter</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_ForeignCurrencyTranslationAdjustmentIncomeNet_0" xml:lang="en-US">Represents amount of Foreign currency translation adjustment, net.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_ForeignCurrencyTranslationAdjustmentIncomeNet_1" xml:lang="en-US">Foreign Currency Translation Adjustment Income Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_ForeignCurrencyTranslationAdjustmentIncomeNet_2" xml:lang="en-US">Foreign currency translation adjustment, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_ForeignCurrencyTranslationAdjustmentsExpensesNet_0" xml:lang="en-US">Foreign Currency Translation Adjustments Expenses Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_ForeignCurrencyTranslationAdjustmentsExpensesNet_1" xml:lang="en-US">Foreign currency translation adjustments, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_GainLossOnFairValueOfWarrants_0" xml:lang="en-US">Gain loss on fair value of warrants.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_GainLossOnFairValueOfWarrants_1" xml:lang="en-US">Gain Loss On Fair Value Of Warrants</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_GainLossOnFairValueOfWarrants_2" xml:lang="en-US">Loss on fair value of warrants</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_GeneralAndAdministrativeExpensesAndDisposedTotalAssetsGross_0" xml:lang="en-US">Represents amount of general and administrative expenses and disposed total assets.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_GeneralAndAdministrativeExpensesAndDisposedTotalAssetsGross_1" xml:lang="en-US">General And Administrative Expenses And Disposed Total Assets, Gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_GeneralAndAdministrativeExpensesAndDisposedTotalAssetsGross_2" xml:lang="en-US">General and administrative expenses and disposed total assets, Gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_IncreaseInDeferredContractAcquisitionAndFulfillmentCosts_0" xml:lang="en-US">Represents amount of Increase in deferred contract acquisition and fulfillment costs.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_kltr_IncreaseInDeferredContractAcquisitionAndFulfillmentCosts_1" xml:lang="en-US">Increase in deferred contract acquisition and fulfillment costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_IncreaseInDeferredContractAcquisitionAndFulfillmentCosts_2" xml:lang="en-US">Increase In Deferred Contract Acquisition And Fulfillment Costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_IncreaseInDeferredContractAcquisitionAndFulfillmentCosts_3" xml:lang="en-US">Increase in deferred contract acquisition and fulfillment costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_IncrementalCommonSharesAttributableToDilutiveEffectForWarrantsToPurchaseCommonStock_0" xml:lang="en-US">Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of Warrants to purchase common stock.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_IncrementalCommonSharesAttributableToDilutiveEffectForWarrantsToPurchaseCommonStock_1" xml:lang="en-US">Incremental Common Shares Attributable To Dilutive Effect For Warrants To Purchase Common Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_IncrementalCommonSharesAttributableToDilutiveEffectForWarrantsToPurchaseCommonStock_2" xml:lang="en-US">Warrants to purchase common stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_InstallmentPaymentDateAxis_0" xml:lang="en-US">Debt installment payment date.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_InstallmentPaymentDateAxis_1" xml:lang="en-US">Installment Payment Date [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_InstallmentPaymentDateDomain_0" xml:lang="en-US">Debt installment payment date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_InstallmentPaymentDateDomain_1" xml:lang="en-US">Installment Payment Date [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_IsraeliStockOption2007PlanMember_0" xml:lang="en-US">2007 Israeli Stock Option Plan</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_IsraeliStockOption2007PlanMember_1" xml:lang="en-US">Israeli Stock Option 2007 Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_IsraeliStockOption2007PlanMember_2" xml:lang="en-US">2007 Israeli Stock Option Plan</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_IssuanceOfOrdinarySharesAndWarrantWithRespectToBusinessCombination_0" xml:lang="en-US">Represents amount of issuance of ordinary shares and warrant with respect to business combination.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_IssuanceOfOrdinarySharesAndWarrantWithRespectToBusinessCombination_1" xml:lang="en-US">Issuance Of Ordinary Shares And Warrant With Respect To Business Combination</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_IssuanceOfOrdinarySharesAndWarrantWithRespectToBusinessCombination_2" xml:lang="en-US">Issuance of common shares and warrant with respect to business combination</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_IssuanceOfPreferredStockSharesUponExerciseOfWarrants_0" xml:lang="en-US">Issuance of preferred stock shares upon exercise of warrants</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_IssuanceOfPreferredStockSharesUponExerciseOfWarrants_1" xml:lang="en-US">Issuance Of Preferred Stock Shares Upon Exercise Of Warrants</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_IssuanceOfPreferredStockSharesUponExerciseOfWarrants_2" xml:lang="en-US">Issuance of preferred stock upon exercise of warrants (in Shares)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_IssuanceOfPreferredStockValueUponExerciseOfWarrants_0" xml:lang="en-US">Issuance of preferred stock upon exercise of warrants.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_IssuanceOfPreferredStockValueUponExerciseOfWarrants_1" xml:lang="en-US">Issuance Of Preferred Stock Value Upon Exercise Of Warrants</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_IssuanceOfPreferredStockValueUponExerciseOfWarrants_2" xml:lang="en-US">Issuance of preferred stock upon exercise of warrants</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_IssuanceOfPreferredStockValueUponExerciseOfWarrants_3" xml:lang="en-US">Preferred stock, $0.0001 par value per share, 20,000,000 and zero shares authorized as of September 30, 2021 and December 31, 2020, respectively; zero issued and outstanding as of September 30, 2021 and December 31, 2020</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_LoanForgiveness_0" xml:lang="en-US">Represents the amount of loan forgiveness.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_LoanForgiveness_1" xml:lang="en-US">Loan Forgiveness</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_LoanForgiveness_2" xml:lang="en-US">Loan forgiveness</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_MediaAndTelecomMember_0" xml:lang="en-US">This member stands for media and telecom.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_MediaAndTelecomMember_1" xml:lang="en-US">Media And Telecom [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_MediaAndTelecomMember_2" xml:lang="en-US">Customer A (M&amp;T)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_MediaAndTelecomMember_3" xml:lang="en-US">Media and Telecom</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_NetIncomeLossAvailableToCommonStockholdersBasicAndDiluted_0" xml:lang="en-US">It represents net income loss available to common stockholders basic and diluted.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_NetIncomeLossAvailableToCommonStockholdersBasicAndDiluted_1" xml:lang="en-US">Net Income Loss Available To Common Stockholders Basic And Diluted</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_kltr_NetIncomeLossAvailableToCommonStockholdersBasicAndDiluted_2" xml:lang="en-US">Total loss attributable to common stockholders, for basic net loss per share</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_NewrowIncMember_0" xml:lang="en-US">Newrow, Inc</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_NewrowIncMember_1" xml:lang="en-US">Newrow, Inc [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_NewrowIncMember_2" xml:lang="en-US">Newrow, Inc</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_NewSeniorSecuredRevolvingCreditFacilityMember_0" xml:lang="en-US">New senior secured revolving credit facility</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_NewSeniorSecuredRevolvingCreditFacilityMember_1" xml:lang="en-US">New Senior Secured Revolving Credit Facility [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_NewSeniorSecuredRevolvingCreditFacilityMember_2" xml:lang="en-US">New Senior Secured Revolving Credit Facility</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_NewSeniorSecuredTermLoanFacilityMember_0" xml:lang="en-US">New senior secured term loan facility</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_NewSeniorSecuredTermLoanFacilityMember_1" xml:lang="en-US">New Senior Secured Term Loan Facility [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_NewSeniorSecuredTermLoanFacilityMember_2" xml:lang="en-US">New Senior Secured Term Loan Facility</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_NonCashExpensesWithRespectToStockholdersLoans_0" xml:lang="en-US">Represents the amount of Non-cash expenses with respect to stockholders&#8217; loans.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_NonCashExpensesWithRespectToStockholdersLoans_1" xml:lang="en-US">Non Cash Expenses With Respect To Stockholders Loans</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_NonCashExpensesWithRespectToStockholdersLoans_2" xml:lang="en-US">Non-cash expenses with respect to stockholders&#8217; loans</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_NonCashInterestExpenses_0" xml:lang="en-US">Represents amount of non-cash interest expenses.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_NonCashInterestExpenses_1" xml:lang="en-US">Non Cash Interest Expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_NonCashInterestExpenses_2" xml:lang="en-US">Non-cash interest expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_NonCashTransactionsAbstract_0" xml:lang="en-US">Non Cash Transactions [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_NonCashTransactionsAbstract_1" xml:lang="en-US">Non-cash transactions:</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_NumberOfAccretionOfRedeemableConvertiblePreferredStock_0" xml:lang="en-US">Represents the number of accretion of redeemable convertible preferred stock.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_NumberOfAccretionOfRedeemableConvertiblePreferredStock_1" xml:lang="en-US">Number Of Accretion Of Redeemable Convertible Preferred Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_NumberOfAccretionOfRedeemableConvertiblePreferredStock_2" xml:lang="en-US">Accretion of redeemable convertible preferred stock (in Shares)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_NumberOfIssuanceOfOrdinarySharesUponBusinessAcquisition_0" xml:lang="en-US">Represents the number of issuance of Ordinary shares upon business acquisition.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_NumberOfIssuanceOfOrdinarySharesUponBusinessAcquisition_1" xml:lang="en-US">Number Of Issuance Of Ordinary Shares Upon Business Acquisition</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_NumberOfIssuanceOfOrdinarySharesUponBusinessAcquisition_2" xml:lang="en-US">Issuance of common shares upon business combination (in Shares)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_NumberOfIssuanceOfOrdinarySharesUponBusinessAcquisition_3" xml:lang="en-US">Issuance of Ordinary shares upon business combination (in Shares)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_NumberOfIssuanceOfOrdinarySharesUponExerciseOfStockOptions_0" xml:lang="en-US">Represents issuance of ordinary shares upon exercise of stock options.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_NumberOfIssuanceOfOrdinarySharesUponExerciseOfStockOptions_1" xml:lang="en-US">Number Of Issuance Of Ordinary Shares Upon Exercise Of Stock Options</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_NumberOfIssuanceOfOrdinarySharesUponExerciseOfStockOptions_2" xml:lang="en-US">Issuance of Ordinary shares upon exercise of stock options (in Shares)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_NumberOfOrdinarySharesPursuantToExerciseInFullOfUnderwritersOptionToPurchaseAdditionalShares_0" xml:lang="en-US">Represents number of ordinary shares pursuant to the exercise in full of the underwriters&#8217; option to purchase additional shares.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_NumberOfOrdinarySharesPursuantToExerciseInFullOfUnderwritersOptionToPurchaseAdditionalShares_1" xml:lang="en-US">Number Of Ordinary Shares Pursuant To Exercise In Full Of Underwriters Option To Purchase Additional Shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_NumberOfOrdinarySharesPursuantToExerciseInFullOfUnderwritersOptionToPurchaseAdditionalShares_2" xml:lang="en-US">Number of ordinary shares pursuant to the exercise in full of the underwriters&#8217; option to purchase additional shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_NumberOfOrdinarySharesPursuantToExerciseInFullOfUnderwritersOptionToPurchaseAdditionalShares_3" xml:lang="en-US">Number of ordinary shares pursuant to the exercise in full of the underwriters&#8217; option to purchase additional shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_NumberOfPreferredSharesIssuedInConversionOfWarrants_0" xml:lang="en-US">The number of preferred shares issued in conversion of warrants.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_NumberOfPreferredSharesIssuedInConversionOfWarrants_1" xml:lang="en-US">Number Of Preferred Shares Issued In Conversion Of Warrants</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_NumberOfPreferredSharesIssuedInConversionOfWarrants_2" xml:lang="en-US">Issuance of preferred stock upon exercise of warrants (in Shares)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_NumberOfPreferredSharesIssuedInConversionOfWarrants_3" xml:lang="en-US">Number of Series C convertible preferred stock issued in conversion of warrants</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_NumberOfWarrantsConverted_0" xml:lang="en-US">Represents the number of warrants exercised.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_NumberOfWarrantsConverted_1" xml:lang="en-US">Number Of Warrants Converted</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_NumberOfWarrantsConverted_2" xml:lang="en-US">Number of Series C warrants converted</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_OnAndAfterMarch312023Member_0" xml:lang="en-US">On and after March 31, 2023</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_OnAndAfterMarch312023Member_1" xml:lang="en-US">On And After March 31, 2023 [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_OnAndAfterMarch312023Member_2" xml:lang="en-US">On and after March 31, 2023</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_OnApril012021ThroughDecember312021Member_0" xml:lang="en-US">On April 01, 2021, through December 31, 2021</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_OnApril012021ThroughDecember312021Member_1" xml:lang="en-US">On April 01, 2021, Through December 31, 2021 [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_OnApril012021ThroughDecember312021Member_2" xml:lang="en-US">On April 01, 2021, through December 31, 2021</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_OnMarch312022ThroughDecember312022Member_0" xml:lang="en-US">On March 31, 2022 through December 31, 2022</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_OnMarch312022ThroughDecember312022Member_1" xml:lang="en-US">On March 31, 2022 Through December 31, 2022 [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_OnMarch312022ThroughDecember312022Member_2" xml:lang="en-US">On March 31, 2022 through December 31, 2022</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_OtherAssetsNoncurrentTextBlock_0" xml:lang="en-US">The entire disclosure for other assets, noncurrent.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_OtherAssetsNoncurrentTextBlock_1" xml:lang="en-US">Other Assets, Noncurrent [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_OtherAssetsNoncurrentTextBlock_2" xml:lang="en-US">OTHER ASSETS, NONCURRENT</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_OtherCountriesMember_0" xml:lang="en-US">This member stands other countries.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_OtherCountriesMember_1" xml:lang="en-US">Other Countries [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_OtherCountriesMember_2" xml:lang="en-US">Other</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_OtherFinancialExpenses_0" xml:lang="en-US">Represents the amount of other financial expenses.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_OtherFinancialExpenses_1" xml:lang="en-US">Other Financial Expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_OtherIssuanceCosts_0" xml:lang="en-US">Represents amount of other issuance costs.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_OtherIssuanceCosts_1" xml:lang="en-US">Other Issuance Costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_OtherIssuanceCosts_2" xml:lang="en-US">Other issuance costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_PaymentOfDeferredOfferingCost_0" xml:lang="en-US">Represents amount of payment of deferred offering cost.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_PaymentOfDeferredOfferingCost_1" xml:lang="en-US">Payment Of Deferred Offering Cost</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_PaymentOfDeferredOfferingCost_2" xml:lang="en-US">Payment of deferred offering costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_PaymentRelatedToConversionOfRedeemableConvertiblePreferredStockUponInitialPublicOffering_0" xml:lang="en-US">Payment Related To Conversion Of Redeemable Convertible Preferred Stock Upon Initial Public Offering</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_PaymentRelatedToConversionOfRedeemableConvertiblePreferredStockUponInitialPublicOffering_1" xml:lang="en-US">It represents payment related to conversion of redeemable convertible preferred stock upon initial public offering.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_kltr_PaymentRelatedToConversionOfRedeemableConvertiblePreferredStockUponInitialPublicOffering_2" xml:lang="en-US">Payment related to the conversion of Series F redeemable convertible preferred stock upon initial public offering</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_PaymentsOfOtherIssuanceCosts_0" xml:lang="en-US">Represents the amount related to payments of other issuance costs.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_PaymentsOfOtherIssuanceCosts_1" xml:lang="en-US">Payments Of Other Issuance Costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_PaymentsOfOtherIssuanceCosts_2" xml:lang="en-US">Othe issuance costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_PercentageOfOfferingPrice_0" xml:lang="en-US">Represents the percentage of offering price.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_PercentageOfOfferingPrice_1" xml:lang="en-US">Percentage Of Offering Price</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_PercentageOfOfferingPrice_2" xml:lang="en-US">Percentage of offering price</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_PreferredStockRedemptionDiscountShares_0" xml:lang="en-US">Preferred stock redemption discount on shares.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_PreferredStockRedemptionDiscountShares_1" xml:lang="en-US">Preferred Stock Redemption Discount Shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_PreferredStockRedemptionDiscountShares_2" xml:lang="en-US">Redemption of redeemable convertible preferred stock upon initial public offering (in Shares)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_PreferredStockValueIssuedInConversionOfWarrants_0" xml:lang="en-US">Issuance of preferred stock value upon exercise of warrants.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_PreferredStockValueIssuedInConversionOfWarrants_1" xml:lang="en-US">Preferred Stock Value Issued In Conversion Of Warrants</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_PreferredStockValueIssuedInConversionOfWarrants_2" xml:lang="en-US">Issuance of preferred stock upon exercise of warrants</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_PrepaidExpensesAndOtherCurrentAssetsTableTextBlock_0" xml:lang="en-US">Disclosure of information about prepaid expenses and other current assets.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_PrepaidExpensesAndOtherCurrentAssetsTableTextBlock_1" xml:lang="en-US">Prepaid Expenses And Other Current Assets [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_PrepaidExpensesAndOtherCurrentAssetsTableTextBlock_2" xml:lang="en-US">Schedule of prepaid expenses and other current assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_PrepaidExpensesAndOtherCurrentAssetsTextBlock_0" xml:lang="en-US">The entire disclosure for prepaid expenses and other current assets.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_PrepaidExpensesAndOtherCurrentAssetsTextBlock_1" xml:lang="en-US">Prepaid Expenses And Other Current Assets [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_PrepaidExpensesAndOtherCurrentAssetsTextBlock_2" xml:lang="en-US">PREPAID EXPENSES AND OTHER CURRENT ASSETS</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_PrepaidExpensesGovernmentInstitutions_0" xml:lang="en-US">Represents the prepaid expenses government institutions.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_PrepaidExpensesGovernmentInstitutions_1" xml:lang="en-US">Prepaid Expenses Government Institutions</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_PrepaidExpensesGovernmentInstitutions_2" xml:lang="en-US">Government institutions</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_ProfessionalServicesMember_0" xml:lang="en-US">Represents professional services member.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_ProfessionalServicesMember_1" xml:lang="en-US">Professional Services [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_ProfessionalServicesMember_2" xml:lang="en-US">Professional Services</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_PurchaseOfPropertyEquipmentAndIntangibleAssetInCredit_0" xml:lang="en-US">Purchase Of Property Equipment And Intangible Asset In Credit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_PurchaseOfPropertyEquipmentAndIntangibleAssetInCredit_1" xml:lang="en-US">Purchase of property and equipment, internal-use software and intangible asset in credit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_ReceivablesOnAccountOfStock_0" xml:lang="en-US">Amount due from owner or affiliate of reporting entity for issuance of shares. Includes, but is not limited to, amount due for award under share-based payment arrangement.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_kltr_ReceivablesOnAccountOfStock_1" xml:lang="en-US">Receivables on account of stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_ReceivablesOnAccountOfStock_2" xml:lang="en-US">Receivables On Account Of Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_ReceivablesOnAccountOfStock_3" xml:lang="en-US">Receivables on account of stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_ReclassificationOfWarrantsToPurchasePreferredAndCommonStockToAdditionalPaidInCapital_0" xml:lang="en-US">The value of reclassification of warrants to purchase preferred and common stock to additional paid-in capital.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_ReclassificationOfWarrantsToPurchasePreferredAndCommonStockToAdditionalPaidInCapital_1" xml:lang="en-US">Reclassification Of Warrants To Purchase Preferred And Common Stock To Additional Paid In Capital</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_ReclassificationOfWarrantsToPurchasePreferredAndCommonStockToAdditionalPaidInCapital_2" xml:lang="en-US">Reclassification of warrants to purchase preferred and common stock to additional paid-in capital upon initial public offering</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_ReclassificationOfWarrantToCommonStocksToEquity_0" xml:lang="en-US">Reclassification of warrant to common stocks to equity.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_ReclassificationOfWarrantToCommonStocksToEquity_1" xml:lang="en-US">Reclassification Of Warrant To Common Stocks To Equity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_ReclassificationOfWarrantToCommonStocksToEquity_2" xml:lang="en-US">Reclassification of warrant to common stocks to equity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_ReclassificationOfWarrantToCommonStocksToMezzanineEquity_0" xml:lang="en-US">Reclassification of warrant to common stocks to mezzanine equity.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_ReclassificationOfWarrantToCommonStocksToMezzanineEquity_1" xml:lang="en-US">Reclassification Of Warrant To Common Stocks To Mezzanine Equity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_ReclassificationOfWarrantToCommonStocksToMezzanineEquity_2" xml:lang="en-US">Reclassification of warrant to common stocks to equity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_ReconciliationOfCashCashEquivalentsAndRestrictedCashToCondensedConsolidatedBalanceSheetsAbstract_0" xml:lang="en-US">Reconciliation Of Cash Cash Equivalents And Restricted Cash To Condensed Consolidated Balance Sheets [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_ReconciliationOfCashCashEquivalentsAndRestrictedCashToCondensedConsolidatedBalanceSheetsAbstract_1" xml:lang="en-US">Reconciliation of cash, cash equivalents, and restricted cash to the condensed consolidated balance sheets:</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_RedemptionOfRedeemableConvertiblePreferredStockUponInitialPublicOffering_0" xml:lang="en-US">Represent the redemption of redeemable convertible preferred stock, upon initial public offering.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_RedemptionOfRedeemableConvertiblePreferredStockUponInitialPublicOffering_1" xml:lang="en-US">Redemption Of Redeemable Convertible Preferred Stock, Upon Initial Public Offering</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_RedemptionOfRedeemableConvertiblePreferredStockUponInitialPublicOffering_2" xml:lang="en-US">Redemption of redeemable convertible preferred stock, upon initial public offering</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_RemeasurementOfWarrantsToFairValue_0" xml:lang="en-US">Represents the amount of remeasurement of warrants to fair value.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_RemeasurementOfWarrantsToFairValue_1" xml:lang="en-US">Remeasurement Of Warrants To Fair Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_RemeasurementOfWarrantsToFairValueFinancialExpense_0" xml:lang="en-US">Represents remeasurement of warrants to fair value relating to financial expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_RemeasurementOfWarrantsToFairValueFinancialExpense_1" xml:lang="en-US">Remeasurement Of Warrants To Fair Value Financial Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_RemeasurementOfWarrantsToFairValueFinancialExpense_2" xml:lang="en-US">Remeasurement of warrants to fair value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_RemeasurementOfWarrantsToFairValueFinancialIncome_0" xml:lang="en-US">Represents remeasurement of warrants to fair value relating to finance income.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_RemeasurementOfWarrantsToFairValueFinancialIncome_1" xml:lang="en-US">Remeasurement Of Warrants To Fair Value Financial Income</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_RemeasurementOfWarrantsToFairValueFinancialIncome_2" xml:lang="en-US">Remeasurement of warrants to fair value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_RepaymentOfFinanceLeaseLiabilities_0" xml:lang="en-US">Represents amount of repayment of finance lease liabilities.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_kltr_RepaymentOfFinanceLeaseLiabilities_1" xml:lang="en-US">Principal payments on finance leases</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_RepaymentOfFinanceLeaseLiabilities_2" xml:lang="en-US">Repayment Of Finance Lease Liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_RestrictedCashIncludedInOtherAssetsNonCurrent_0" xml:lang="en-US">Represents the amount of Restricted cash included in other assets, non-current.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_RestrictedCashIncludedInOtherAssetsNonCurrent_1" xml:lang="en-US">Restricted Cash Included In Other Assets Non Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_RestrictedCashIncludedInOtherAssetsNonCurrent_2" xml:lang="en-US">Restricted cash included in other assets, non-current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_RestrictedCashIncludedInOtherAssetsNonCurrent_3" xml:lang="en-US">Restricted Cash Included In Other Assets Non Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_RevenueRemainingPerformanceObligationBilledConsiderationAmount_0" xml:lang="en-US">Amount of billed consideration transaction price allocated to performance obligation that has not been recognized as revenue.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_RevenueRemainingPerformanceObligationBilledConsiderationAmount_1" xml:lang="en-US">Revenue Remaining Performance Obligation Billed Consideration Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_RevenueRemainingPerformanceObligationBilledConsiderationAmount_2" xml:lang="en-US">Billed consideration</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_RevenueRemainingPerformanceObligationUnbilledConsiderationAmount_0" xml:lang="en-US">Amount of unbilled consideration transaction price allocated to performance obligation that has not been recognized as revenue.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_RevenueRemainingPerformanceObligationUnbilledConsiderationAmount_1" xml:lang="en-US">Revenue Remaining Performance Obligation Unbilled Consideration Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_RevenueRemainingPerformanceObligationUnbilledConsiderationAmount_2" xml:lang="en-US">Unbilled consideration</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_RevenuesFromContractsWithCustomersTextBlock_0" xml:lang="en-US">Represents disclosure of revenues from contracts with customers.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_RevenuesFromContractsWithCustomersTextBlock_1" xml:lang="en-US">Revenues From Contracts With Customers [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_RevenuesFromContractsWithCustomersTextBlock_2" xml:lang="en-US">REVENUES FROM CONTRACTS WITH CUSTOMERS</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_ScheduleOfLongLivedAssetsBasedOnGeographicalAreasTableTextBlock_0" xml:lang="en-US">Tabular disclosure of long lived assets based on geographical areas.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_ScheduleOfLongLivedAssetsBasedOnGeographicalAreasTableTextBlock_1" xml:lang="en-US">Schedule Of Long Lived Assets Based On Geographical Areas [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_ScheduleOfLongLivedAssetsBasedOnGeographicalAreasTableTextBlock_2" xml:lang="en-US">Schedule of long lived assets based on geographical areas</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_SelectedStatementOfOperationsDataAbstract_0" xml:lang="en-US">Selected Statement Of Operations Data [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_SeriesAConvertibleAndRedeemableConvertiblePreferredStockMember_0" xml:lang="en-US">Series A Convertible And Redeemable Convertible Preferred Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_SeriesAConvertibleAndRedeemableConvertiblePreferredStockMember_1" xml:lang="en-US">Series A Convertible And Redeemable Convertible Preferred Stock [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_SeriesAConvertibleAndRedeemableConvertiblePreferredStockMember_2" xml:lang="en-US">Series A Preferred stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_SeriesBConvertibleAndRedeemableConvertiblePreferredStockMember_0" xml:lang="en-US">Series B Convertible And Redeemable Convertible Preferred Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_SeriesBConvertibleAndRedeemableConvertiblePreferredStockMember_1" xml:lang="en-US">Series B Convertible And Redeemable Convertible Preferred Stock [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_SeriesBConvertibleAndRedeemableConvertiblePreferredStockMember_2" xml:lang="en-US">Series B Preferred stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_SeriesCConvertibleAndRedeemableConvertiblePreferredStockMember_0" xml:lang="en-US">Series C Convertible And Redeemable Convertible Preferred Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_SeriesCConvertibleAndRedeemableConvertiblePreferredStockMember_1" xml:lang="en-US">Series C Convertible And Redeemable Convertible Preferred Stock [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_SeriesCConvertibleAndRedeemableConvertiblePreferredStockMember_2" xml:lang="en-US">Series C Preferred stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_SeriesD1ConvertibleAndRedeemableConvertiblePreferredStockMember_0" xml:lang="en-US">Series D 1 Convertible And Redeemable Convertible Preferred Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_SeriesD1ConvertibleAndRedeemableConvertiblePreferredStockMember_1" xml:lang="en-US">Series D 1 Convertible And Redeemable Convertible Preferred Stock [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_SeriesD1ConvertibleAndRedeemableConvertiblePreferredStockMember_2" xml:lang="en-US">Series D-1 Preferred stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_SeriesDConvertibleAndRedeemableConvertiblePreferredStockMember_0" xml:lang="en-US">Series D Convertible And Redeemable Convertible Preferred Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_SeriesDConvertibleAndRedeemableConvertiblePreferredStockMember_1" xml:lang="en-US">Series D Convertible And Redeemable Convertible Preferred Stock [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_SeriesDConvertibleAndRedeemableConvertiblePreferredStockMember_2" xml:lang="en-US">Series D Preferred stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_SeriesEConvertibleAndRedeemableConvertiblePreferredStockMember_0" xml:lang="en-US">Series E Convertible And Redeemable Convertible Preferred Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_SeriesEConvertibleAndRedeemableConvertiblePreferredStockMember_1" xml:lang="en-US">Series E Convertible And Redeemable Convertible Preferred Stock [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_SeriesEConvertibleAndRedeemableConvertiblePreferredStockMember_2" xml:lang="en-US">Series E Preferred stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_SeriesFConvertibleAndRedeemableConvertiblePreferredStockMember_0" xml:lang="en-US">Series F Convertible And Redeemable Convertible Preferred Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_SeriesFConvertibleAndRedeemableConvertiblePreferredStockMember_1" xml:lang="en-US">Series F Convertible And Redeemable Convertible Preferred Stock [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_SeriesFConvertibleAndRedeemableConvertiblePreferredStockMember_2" xml:lang="en-US">Series F Preferred stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_SeverancePayFund_0" xml:lang="en-US">Represents the severance pay fund.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_SeverancePayFund_1" xml:lang="en-US">Severance Pay Fund</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_SeverancePayFund_2" xml:lang="en-US">Severance pay fund</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_SignificantAccountingPoliciesAndEstimatesPolicyTextBlock_0" xml:lang="en-US">Disclosure of accounting policy for significant accounting policies and estimates.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_SignificantAccountingPoliciesAndEstimatesPolicyTextBlock_1" xml:lang="en-US">Significant Accounting Policies And Estimates [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_SignificantAccountingPoliciesAndEstimatesPolicyTextBlock_2" xml:lang="en-US">Significant Accounting Policies and Estimates</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_StockIssuedCashlessExerciseOfWarrantsToPurchasePreferredAndCommonStock_0" xml:lang="en-US">Represents shares of cashless exercise of the warrants to purchase preferred and common stock.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_StockIssuedCashlessExerciseOfWarrantsToPurchasePreferredAndCommonStock_1" xml:lang="en-US">Stock Issued Cashless Exercise Of Warrants To Purchase Preferred And Common Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_StockIssuedCashlessExerciseOfWarrantsToPurchasePreferredAndCommonStock_2" xml:lang="en-US">Stock issued for cashless exercise of warrants to purchase preferred and common stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_StockIssuedDuringPeriodSharesConversionOfWarrantsToCommonStock_0" xml:lang="en-US">Stock Issued During Period Shares Conversion Of Warrants To Common Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_StockIssuedDuringPeriodSharesConversionOfWarrantsToCommonStock_1" xml:lang="en-US">Stock Issued During Period, Shares, Conversion Of Warrants To Common Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_StockIssuedDuringPeriodSharesConversionOfWarrantsToCommonStock_2" xml:lang="en-US">Stock Issued During Period, Shares, Conversion Of Warrants To Common Stock (in Shares)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_StockIssuedDuringPeriodSharesIssuanceOfCommonStockUponInitialPublicOfferingNetOfUnderwritingDiscountsAndCommissionsAndOtherIssuanceCosts_0" xml:lang="en-US">Number of issuance of common stock upon initial public offering net of underwriting discounts and commissions and other issuance costs.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_StockIssuedDuringPeriodSharesIssuanceOfCommonStockUponInitialPublicOfferingNetOfUnderwritingDiscountsAndCommissionsAndOtherIssuanceCosts_1" xml:lang="en-US">Stock Issued During Period, Shares, Issuance Of Common Stock Upon Initial Public Offering Net Of Underwriting Discounts And Commissions And Other Issuance Costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_StockIssuedDuringPeriodSharesIssuanceOfCommonStockUponInitialPublicOfferingNetOfUnderwritingDiscountsAndCommissionsAndOtherIssuanceCosts_2" xml:lang="en-US">Issuance of common stock upon initial public offering, net of underwriting discounts and commissions and other issuance costs (in Shares)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_StockIssuedDuringPeriodSharesOfWarrantsToPurchasePreferredAndCommonStockToAdditionalPaidInCapitalUponInitialPublicOffering_0" xml:lang="en-US">Conversion of warrants to common stock upon initial public offering</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_StockIssuedDuringPeriodSharesOfWarrantsToPurchasePreferredAndCommonStockToAdditionalPaidInCapitalUponInitialPublicOffering_1" xml:lang="en-US">Stock Issued During Period, Shares Of Warrants To Purchase Preferred And Common Stock To Additional Paid In Capital Upon Initial Public Offering</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_StockIssuedDuringPeriodSharesOfWarrantsToPurchasePreferredAndCommonStockToAdditionalPaidInCapitalUponInitialPublicOffering_2" xml:lang="en-US">Conversion of warrants to common stock upon initial public offering (in Shares)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_StockIssuedDuringPeriodValueConversionOfWarrantsToCommonStock_0" xml:lang="en-US">Stock Issued During Period Value Conversion Of Warrants To Common Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_StockIssuedDuringPeriodValueConversionOfWarrantsToCommonStock_1" xml:lang="en-US">Stock Issued During Period, Value, Conversion Of Warrants To Common Stock.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_StockIssuedDuringPeriodValueConversionOfWarrantsToCommonStock_2" xml:lang="en-US">Conversion of warrants to common stock upon initial public offering</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_kltr_StockIssuedDuringPeriodValueConversionOfWarrantsToCommonStock_3" xml:lang="en-US">Conversion of warrants to common stock upon initial public offering</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_StockIssuedDuringPeriodValueConversionOfWarrantsToCommonStock_4" xml:lang="en-US">Conversion of warrants to common stock upon initial public offering</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_StockIssuedDuringPeriodValueIssuanceOfCommonStockUponInitialPublicOfferingNetOfUnderwritingDiscountsAndCommissionsAndOtherIssuanceCosts_0" xml:lang="en-US">value of issuance of common stock upon initial public offering, net of underwriting discounts and commissions and other issuance costs.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_StockIssuedDuringPeriodValueIssuanceOfCommonStockUponInitialPublicOfferingNetOfUnderwritingDiscountsAndCommissionsAndOtherIssuanceCosts_1" xml:lang="en-US">Stock Issued During Period Value Issuance Of Common Stock Upon Initial Public Offering Net Of Underwriting Discounts And Commissions And Other Issuance Costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_StockIssuedDuringPeriodValueIssuanceOfCommonStockUponInitialPublicOfferingNetOfUnderwritingDiscountsAndCommissionsAndOtherIssuanceCosts_2" xml:lang="en-US">Issuance of common stock upon initial public offering, net of underwriting discounts and commissions and other issuance costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_StockIssuedDuringPeriodValueOfWarrantsToPurchasePreferredAndCommonStockToAdditionalPaidInCapitalUponInitialPublicOffering_0" xml:lang="en-US">Stock Issued During Period, Value, Conversion of warrants to common stock upon initial public offering.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_kltr_StockIssuedDuringPeriodValueOfWarrantsToPurchasePreferredAndCommonStockToAdditionalPaidInCapitalUponInitialPublicOffering_1" xml:lang="en-US">Conversion of warrants to common stock upon initial public offering</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_StockIssuedDuringPeriodValueOfWarrantsToPurchasePreferredAndCommonStockToAdditionalPaidInCapitalUponInitialPublicOffering_2" xml:lang="en-US">Stock Issued During Period Value Of Warrants To Purchase Preferred And Common Stock To Additional Paid In Capital Upon Initial Public Offering</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_StockIssuedDuringPeriodValueOfWarrantsToPurchasePreferredAndCommonStockToAdditionalPaidInCapitalUponInitialPublicOffering_3" xml:lang="en-US">Conversion of warrants to common stock upon initial public offering</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_SubscriptionMember_0" xml:lang="en-US">Represents subscription member.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_SubscriptionMember_1" xml:lang="en-US">Subscription [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_SubscriptionMember_2" xml:lang="en-US">Subscription</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_TemporaryEquitySharesIssuedAndOutstanding_0" xml:lang="en-US">Represents the number of temporary shares issued and outstanding.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_TemporaryEquitySharesIssuedAndOutstanding_1" xml:lang="en-US">Temporary Equity, Shares Issued And Outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_TemporaryEquitySharesIssuedAndOutstanding_2" xml:lang="en-US">Number of shares issued and outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues_0" xml:lang="en-US">Represents issuance of preferred stock upon exercise of warrants.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues_1" xml:lang="en-US">Temporary Equity Stock Issued During Period Shares New Issues</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues_2" xml:lang="en-US">Issuance of preferred stock upon exercise of warrants (in Shares)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_TotalSegmentsMember_0" xml:lang="en-US">Information about total segments.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_TotalSegmentsMember_1" xml:lang="en-US">Total Segments [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_TotalSegmentsMember_2" xml:lang="en-US">Reportable segments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_TreasurySharesParValuePerShare_0" xml:lang="en-US">Represents the par value of treasury shares.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_TreasurySharesParValuePerShare_1" xml:lang="en-US">Treasury Shares Par Value Per Share</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_TreasurySharesParValuePerShare_2" xml:lang="en-US">Treasury shares par value per share</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_UnderwritingDiscountsAndCommissions_0" xml:lang="en-US">Represents amount of underwriting discounts and commissions.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_UnderwritingDiscountsAndCommissions_1" xml:lang="en-US">Underwriting Discounts And Commissions</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_UnderwritingDiscountsAndCommissions_2" xml:lang="en-US">Underwriting discounts and commissions</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_UnpaidDeferredOfferingCosts_0" xml:lang="en-US">Unpaid deferred offering costs.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_UnpaidDeferredOfferingCosts_1" xml:lang="en-US">Unpaid Deferred Offering Costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_UnpaidDeferredOfferingCosts_2" xml:lang="en-US">Unpaid deferred offering costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_ValueOfAccretionOfRedeemableConvertiblePreferredStock_0" xml:lang="en-US">Represents the amount of accretion of redeemable convertible preferred stock.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_ValueOfAccretionOfRedeemableConvertiblePreferredStock_1" xml:lang="en-US">Value Of Accretion Of Redeemable Convertible Preferred Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_ValueOfAccretionOfRedeemableConvertiblePreferredStock_2" xml:lang="en-US">Accretion of redeemable convertible preferred stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_ValueOfIssuanceOfOrdinarySharesUponBusinessAcquisition_0" xml:lang="en-US">Represents amount of issuance of ordinary shares upon business acquisition.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_ValueOfIssuanceOfOrdinarySharesUponBusinessAcquisition_1" xml:lang="en-US">Value Of Issuance Of Ordinary Shares Upon Business Acquisition</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_ValueOfIssuanceOfOrdinarySharesUponBusinessAcquisition_2" xml:lang="en-US">Issuance of common shares upon business combination</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_ValueOfIssuanceOfOrdinarySharesUponBusinessAcquisition_3" xml:lang="en-US">Issuance of Ordinary shares upon business combination</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_ValueOfIssuanceOfOrdinarySharesUponExerciseOfStockOptions_0" xml:lang="en-US">Represent the amount of issuance of Ordinary shares upon exercise of stock options.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_ValueOfIssuanceOfOrdinarySharesUponExerciseOfStockOptions_1" xml:lang="en-US">Value Of Issuance Of Ordinary Shares Upon Exercise Of Stock Options</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_ValueOfIssuanceOfOrdinarySharesUponExerciseOfStockOptions_2" xml:lang="en-US">Issuance of Ordinary shares upon exercise of stock options</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_WarrantsFairValueAssumptionsExpectedDividendRate_0" xml:lang="en-US">The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the warrant's term.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_WarrantsFairValueAssumptionsExpectedDividendRate_1" xml:lang="en-US">Warrants Fair Value Assumptions, Expected Dividend Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_WarrantsFairValueAssumptionsExpectedDividendRate_2" xml:lang="en-US">Dividend yield</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_WarrantsFairValueAssumptionsExpectedTerm_0" xml:lang="en-US">Expected term of award under warrants arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_WarrantsFairValueAssumptionsExpectedTerm_1" xml:lang="en-US">Warrants Fair Value Assumptions, Expected Term</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_WarrantsFairValueAssumptionsExpectedTerm_2" xml:lang="en-US">Expected life</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_WarrantsFairValueAssumptionsExpectedTerm_3" xml:lang="en-US">Expected life (years)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_WarrantsFairValueAssumptionsExpectedVolatilityRate_0" xml:lang="en-US">The estimated measure of the percentage by which a share price is expected to fluctuate during a period.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_WarrantsFairValueAssumptionsExpectedVolatilityRate_1" xml:lang="en-US">Warrants Fair Value Assumptions, Expected Volatility Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_WarrantsFairValueAssumptionsExpectedVolatilityRate_2" xml:lang="en-US">Volatility</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_WarrantsFairValueAssumptionsRiskFreeInterestRate_0" xml:lang="en-US">The risk-free interest rate assumption that is used in valuing warrants on its own shares.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_WarrantsFairValueAssumptionsRiskFreeInterestRate_1" xml:lang="en-US">Warrants Fair Value Assumptions, Risk Free Interest Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_WarrantsFairValueAssumptionsRiskFreeInterestRate_2" xml:lang="en-US">Risk-free interest rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_WarrantsToPurchasePreferredAndCommonStock_0" xml:lang="en-US">Represents amount related to warrants to purchase preferred and common stock.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="lab_kltr_WarrantsToPurchasePreferredAndCommonStock_1" xml:lang="en-US">Balance at the end of the period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="lab_kltr_WarrantsToPurchasePreferredAndCommonStock_2" xml:lang="en-US">Balance at January 1</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_WarrantsToPurchasePreferredAndCommonStock_3" xml:lang="en-US">Warrants To Purchase Preferred And Common Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_kltr_WarrantsToPurchasePreferredAndCommonStock_4" xml:lang="en-US">Warrants to purchase preferred and common stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_WarrantsToPurchasePreferredAndCommonStockToAdditionalPaidInCapitalUponInitialPublicOffering_0" xml:lang="en-US">This element represents amount of conversion of warrants to common stock upon initial public offering.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_WarrantsToPurchasePreferredAndCommonStockToAdditionalPaidInCapitalUponInitialPublicOffering_1" xml:lang="en-US">Warrants To Purchase Preferred And Common Stock To Additional Paid In Capital Upon Initial Public Offering</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_WarrantsToPurchasePreferredAndCommonStockToAdditionalPaidInCapitalUponInitialPublicOffering_2" xml:lang="en-US">Conversion of warrants to common stock upon initial public offering</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_kltr_WarrantToPurchaseCommonStock_0" xml:lang="en-US">Warrant to purchase common stock.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_kltr_WarrantToPurchaseCommonStock_1" xml:lang="en-US">Warrant To Purchase Common Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_kltr_WarrantToPurchaseCommonStock_2" xml:lang="en-US">Warrant to purchase common stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_srt_CondensedFinancialStatementsTextBlock_0" xml:lang="en-US">Condensed Financial Statements [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_srt_CondensedFinancialStatementsTextBlock_1" xml:lang="en-US">SELECTED STATEMENT OF OPERATIONS DATA</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_srt_ContractualObligationFiscalYearMaturityScheduleTableTextBlock_0" xml:lang="en-US">Contractual Obligation, Fiscal Year Maturity [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_srt_ContractualObligationFiscalYearMaturityScheduleTableTextBlock_1" xml:lang="en-US">Schedule of non-cancelable purchase commitments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_srt_MajorCustomersAxis_0" xml:lang="en-US">Customer [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_srt_NameOfMajorCustomerDomain_0" xml:lang="en-US">Customer [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_srt_ProductOrServiceAxis_0" xml:lang="en-US">Product and Service [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_srt_ProductsAndServicesDomain_0" xml:lang="en-US">Product and Service [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_srt_ScheduleOfCondensedBalanceSheetTableTextBlock_0" xml:lang="en-US">Condensed Balance Sheet [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_srt_ScheduleOfCondensedBalanceSheetTableTextBlock_1" xml:lang="en-US">CONDENSED CONSOLIDATED BALANCE SHEET COMPONENTS</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_srt_SegmentGeographicalDomain_0" xml:lang="en-US">Geographical [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_srt_StatementGeographicalAxis_0" xml:lang="en-US">Geographical [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AccountingPoliciesAbstract_0" xml:lang="en-US">Accounting Policies [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AccountsPayableAccruedLiabilitiesAndOtherLiabilitiesDisclosureCurrentTextBlock_0" xml:lang="en-US">Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_AccountsPayableAccruedLiabilitiesAndOtherLiabilitiesDisclosureCurrentTextBlock_1" xml:lang="en-US">ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent_0" xml:lang="en-US">Accounts Payable and Other Accrued Liabilities, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent_1" xml:lang="en-US">Accrued expenses and other current liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AccountsPayableCurrent_0" xml:lang="en-US">Accounts Payable, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_AccountsPayableCurrent_1" xml:lang="en-US">Trade payables</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AccountsReceivableNetCurrent_0" xml:lang="en-US">Accounts Receivable, after Allowance for Credit Loss, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_AccountsReceivableNetCurrent_1" xml:lang="en-US">Accounts Receivable, after Allowance for Credit Loss, Current, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_AccountsReceivableNetCurrent_2" xml:lang="en-US">Trade receivables</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AccruedIncomeTaxesCurrent_0" xml:lang="en-US">Accrued Income Taxes, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_AccruedIncomeTaxesCurrent_1" xml:lang="en-US">Accrued taxes</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AccruedLiabilitiesAndOtherLiabilities_0" xml:lang="en-US">Accrued Liabilities and Other Liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_AccruedLiabilitiesAndOtherLiabilities_1" xml:lang="en-US">Accrued expenses and other current liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AccruedLiabilitiesAndOtherLiabilitiesAbstract_0" xml:lang="en-US">Accrued Liabilities and Other Liabilities [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AccruedLiabilitiesCurrent_0" xml:lang="en-US">Accrued Liabilities, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_AccruedLiabilitiesCurrent_1" xml:lang="en-US">Accrued expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_0" xml:lang="en-US">Accumulated depreciation</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_1" xml:lang="en-US">Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_2" xml:lang="en-US">Accumulated depreciation</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_0" xml:lang="en-US">Acquired Finite-Lived Intangible Assets [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_0" xml:lang="en-US">Acquired Finite-lived Intangible Assets, Weighted Average Useful Life</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_1" xml:lang="en-US">Weighted average remaining usefullife (in years)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AdditionalPaidInCapitalCommonStock_0" xml:lang="en-US">Additional Paid in Capital, Common Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_AdditionalPaidInCapitalCommonStock_1" xml:lang="en-US">Additional paid-in capital</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AdditionalPaidInCapitalMember_0" xml:lang="en-US">Additional Paid-in Capital [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_AdditionalPaidInCapitalMember_1" xml:lang="en-US">Additional paid-in capital</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_0" xml:lang="en-US">Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_1" xml:lang="en-US">Adjustments required to reconcile net loss to net cash used in operating activities:</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_0" xml:lang="en-US">APIC, Share-based Payment Arrangement, Increase for Cost Recognition</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_1" xml:lang="en-US">APIC, Share-based Payment Arrangement, Increase for Cost Recognition, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_2" xml:lang="en-US">Stock-based compensation expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AllocatedShareBasedCompensationExpense_0" xml:lang="en-US">Share-based Payment Arrangement, Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_AllocatedShareBasedCompensationExpense_1" xml:lang="en-US">Total unrecognized compensation cost</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_AllocatedShareBasedCompensationExpense_2" xml:lang="en-US">Stock-based compensation expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_AmortizationOfAcquisitionCosts_0" xml:lang="en-US">Amortization of deferred contract acquisition costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AmortizationOfAcquisitionCosts_1" xml:lang="en-US">Amortization of Acquisition Costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AmortizationOfIntangibleAssets_0" xml:lang="en-US">Amortization of Intangible Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_AmortizationOfIntangibleAssets_1" xml:lang="en-US">Amortization expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_0" xml:lang="en-US">Antidilutive Securities [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_0" xml:lang="en-US">Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AntidilutiveSecuritiesNameDomain_0" xml:lang="en-US">Antidilutive Securities, Name [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_Assets_0" xml:lang="en-US">Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_Assets_1" xml:lang="en-US">TOTAL ASSETS</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AssetsAbstract_0" xml:lang="en-US">Assets [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_AssetsAbstract_1" xml:lang="en-US">ASSETS</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AssetsCurrent_0" xml:lang="en-US">Assets, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_AssetsCurrent_1" xml:lang="en-US">Total current assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AssetsCurrentAbstract_0" xml:lang="en-US">Assets, Current [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_AssetsCurrentAbstract_1" xml:lang="en-US">CURRENT ASSETS</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AssetsNoncurrent_0" xml:lang="en-US">Assets, Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_AssetsNoncurrent_1" xml:lang="en-US">Total non-current assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AssetsNoncurrentAbstract_0" xml:lang="en-US">Assets, Noncurrent [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_AssetsNoncurrentAbstract_1" xml:lang="en-US">NON-CURRENT ASSETS</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock_0" xml:lang="en-US">Basis of Presentation and Significant Accounting Policies [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock_1" xml:lang="en-US">BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_BusinessAcquisitionAcquireeDomain_0" xml:lang="en-US">Business Acquisition, Acquiree [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_BusinessAcquisitionAxis_0" xml:lang="en-US">Business Acquisition [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts_0" xml:lang="en-US">Business Acquisition, Transaction Costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_0" xml:lang="en-US">Business Acquisition, Equity Interest Issued or Issuable, Number of Shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_1" xml:lang="en-US">Number of common stock shares issued</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_BusinessAcquisitionLineItems_0" xml:lang="en-US">Business Acquisition [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_BusinessCombinationConsiderationTransferred1_0" xml:lang="en-US">Business Combination, Consideration Transferred</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_BusinessCombinationConsiderationTransferred1_1" xml:lang="en-US">Total purchase consideration</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_BusinessCombinationConsiderationTransferred1_2" xml:lang="en-US">Purchase price of acquisition</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_0" xml:lang="en-US">Business Combination, Consideration Transferred, Equity Interests Issued and Issuable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_1" xml:lang="en-US">Common stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_BusinessCombinationDisclosureTextBlock_0" xml:lang="en-US">Business Combination Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_0" xml:lang="en-US">Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_1" xml:lang="en-US">Cash acquired</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_0" xml:lang="en-US">Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_1" xml:lang="en-US">Identified intangible assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_0" xml:lang="en-US">Net liabilities assumed, net of cash acquired</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_1" xml:lang="en-US">Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_0" xml:lang="en-US">Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_1" xml:lang="en-US">Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_BusinessCombinationsAbstract_0" xml:lang="en-US">Business Combinations [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CapitalExpendituresIncurredButNotYetPaid_0" xml:lang="en-US">Capital Expenditures Incurred but Not yet Paid</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CapitalExpendituresIncurredButNotYetPaid_1" xml:lang="en-US">Purchase and sale of property and equipment, internal-use software, and intangible asset in credit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_CapitalizedContractCostAmortization_0" xml:lang="en-US">Amortization of deferred contract acquisition costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CapitalizedContractCostAmortization_1" xml:lang="en-US">Capitalized Contract Cost, Amortization</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_CapitalizedContractCostAmortization_2" xml:lang="en-US">Deferred Policy Acquisition Costs, Amortization Expense, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_CapitalizedContractCostAmortization_3" xml:lang="en-US">Amortization of deferred contract acquisition and fulfillment costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CapitalizedContractCostAxis_0" xml:lang="en-US">Capitalized Contract Cost [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CapitalizedContractCostDomain_0" xml:lang="en-US">Capitalized Contract Cost [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CapitalizedContractCostLineItems_0" xml:lang="en-US">Capitalized Contract Cost [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="lab_us-gaap_CapitalizedContractCostNet_0" xml:lang="en-US">Deferred costs to fulfill contract, ending balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="lab_us-gaap_CapitalizedContractCostNet_1" xml:lang="en-US">Deferred costs to fulfill contract, beginning balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CapitalizedContractCostNet_2" xml:lang="en-US">Capitalized Contract Cost, Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_CapitalizedContractCostNet_3" xml:lang="en-US">Total deferred costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CapitalizedContractCostNetCurrent_0" xml:lang="en-US">Capitalized Contract Cost, Net, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CapitalizedContractCostNetCurrent_1" xml:lang="en-US">Deferred contract acquisition and fulfillment costs, current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_CapitalizedContractCostNetCurrent_2" xml:lang="en-US">Deferred Costs, Current, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CapitalizedContractCostNetNoncurrent_0" xml:lang="en-US">Capitalized Contract Cost, Net, Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CapitalizedContractCostNetNoncurrent_1" xml:lang="en-US">Deferred contract acquisition and fulfillment costs, noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_CapitalizedContractCostNetNoncurrent_2" xml:lang="en-US">Deferred Costs, Noncurrent, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CapitalizedContractCostTable_0" xml:lang="en-US">Capitalized Contract Cost [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CapitalLeaseObligationsCurrent_0" xml:lang="en-US">Capital Lease Obligations, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CapitalLeaseObligationsCurrent_1" xml:lang="en-US">Current portion of long-term lease liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CapitalLeaseObligationsNoncurrent_0" xml:lang="en-US">Capital Lease Obligations, Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CapitalLeaseObligationsNoncurrent_1" xml:lang="en-US">Long-term lease liabilities, net of current portion</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_0" xml:lang="en-US">Capital Leases, Future Minimum Payments Due</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_1" xml:lang="en-US">Total minimum lease payments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_0" xml:lang="en-US">Capital Leases, Future Minimum Payments Due, Next Twelve Months</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_1" xml:lang="en-US">Remaining 2021</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_0" xml:lang="en-US">Capital Leases, Future Minimum Payments Due in Two Years</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_1" xml:lang="en-US">2022</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments_0" xml:lang="en-US">Less: Amount representing interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments_1" xml:lang="en-US">Capital Leases, Future Minimum Payments, Interest Included in Payments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments_2" xml:lang="en-US">Less: Amount representing interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments_0" xml:lang="en-US">Present value of net minimum lease payments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments_1" xml:lang="en-US">Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments_2" xml:lang="en-US">Reminder of 2021</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments_3" xml:lang="en-US">Present value of net minimum lease payments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments_4" xml:lang="en-US">Present value of net minimum lease payments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsReceivable_0" xml:lang="en-US">Capital Leases, Future Minimum Payments Receivable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsReceivable_1" xml:lang="en-US">Total minimum lease payments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsReceivableNextRollingTwelveMonths_0" xml:lang="en-US">2022</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsReceivableNextRollingTwelveMonths_1" xml:lang="en-US">Capital Leases, Future Minimum Payments Receivable, Next Rolling Twelve Months</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsReceivableNextRollingTwelveMonths_2" xml:lang="en-US">2022</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsReceivableRemainderOfFiscalYear_0" xml:lang="en-US">Remaining 2021</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsReceivableRemainderOfFiscalYear_1" xml:lang="en-US">Capital Leases, Future Minimum Payments Receivable, Remainder of Fiscal Year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsReceivableRemainderOfFiscalYear_2" xml:lang="en-US">Remaining 2021</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CashAcquiredFromAcquisition_0" xml:lang="en-US">Cash Acquired from Acquisition</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_CashAcquiredFromAcquisition_1" xml:lang="en-US">Net cash acquired in business combination</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_0" xml:lang="en-US">Cash and Cash Equivalents, at Carrying Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_1" xml:lang="en-US">Cash and cash equivalents</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_0" xml:lang="en-US">Cash, cash equivalents and restricted cash at the end of the period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_1" xml:lang="en-US">Cash, cash equivalents and restricted cash at the beginning of the period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_2" xml:lang="en-US">Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_3" xml:lang="en-US">Total cash, cash equivalents, and restricted cash</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_4" xml:lang="en-US">Total cash, cash equivalents, and restricted cash</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_0" xml:lang="en-US">Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_1" xml:lang="en-US">Increase in cash, cash equivalents and restricted cash</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ClassOfStockDomain_0" xml:lang="en-US">Class of Stock [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ClassOfStockLineItems_0" xml:lang="en-US">Class of Stock [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_0" xml:lang="en-US">Class of Warrant or Right, Number of Securities Called by Warrants or Rights</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_1" xml:lang="en-US">Contingent consideration comprised of warrant to purchase common stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CommitmentsAndContingencies_0" xml:lang="en-US">Commitments and Contingencies</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CommitmentsAndContingencies_1" xml:lang="en-US">COMMITMENTS AND CONTINGENCIES (NOTE 6)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_0" xml:lang="en-US">Commitments and Contingencies Disclosure [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_0" xml:lang="en-US">Commitments and Contingencies Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_1" xml:lang="en-US">COMMITMENTS AND CONTINGENCIES</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CommonStockMember_0" xml:lang="en-US">Common Stock [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CommonStockMember_1" xml:lang="en-US">Common stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CommonStockParOrStatedValuePerShare_0" xml:lang="en-US">Common Stock, Par or Stated Value Per Share</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CommonStockParOrStatedValuePerShare_1" xml:lang="en-US">Common stock, par value (in dollars per share)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CommonStockSharesAuthorized_0" xml:lang="en-US">Common Stock, Shares Authorized</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CommonStockSharesAuthorized_1" xml:lang="en-US">Common stock, shares authorized</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CommonStockSharesIssued_0" xml:lang="en-US">Common Stock, Shares, Issued</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CommonStockSharesIssued_1" xml:lang="en-US">Common stock, shares issued</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="lab_us-gaap_CommonStockSharesOutstanding_0" xml:lang="en-US">Balance (in shares)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="lab_us-gaap_CommonStockSharesOutstanding_1" xml:lang="en-US">Balance (in shares)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CommonStockSharesOutstanding_2" xml:lang="en-US">Common Stock, Shares, Outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CommonStockSharesOutstanding_3" xml:lang="en-US">Common stock, shares outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CommonStockValue_0" xml:lang="en-US">Common Stock, Value, Issued</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CommonStockValue_1" xml:lang="en-US">Common stock, $ 0.0001 par value per share, 1,000,000,000 and 157,500,000 shares authorized as of September 30, 2021, and December 31, 2020, respectively; 134,261,190 and 33,153,112 shares issued as of September 30, 2021 and December 31, 2020, respectively; 126,576,000 and 25,467,922 shares outstanding as of September 30, 2021 and December 31, 2020, respectively;</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CommonStockValueOutstanding_0" xml:lang="en-US">Common Stock, Value, Outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_CommonStockValueOutstanding_1" xml:lang="en-US">Common Stock, Value, Issued, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="lab_us-gaap_CommonStockValueOutstanding_2" xml:lang="en-US">Common Stock, Value, Issued, Beginning Balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="lab_us-gaap_CommonStockValueOutstanding_3" xml:lang="en-US">Common Stock, Value, Issued, Ending Balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CommonStockValueOutstanding_4" xml:lang="en-US">Common stock, $ 0.0001 par value per share, 1,000,000,000 and 157,500,000 shares authorized as of September 30, 2021, and December 31, 2020, respectively; 134,261,190 and 33,153,112 shares issued as of September 30, 2021 and December 31, 2020, respectively; 126,576,000 and 25,467,922 shares outstanding as of September 30, 2021 and December 31, 2020, respectively;</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ComputerEquipmentMember_0" xml:lang="en-US">Computer Equipment [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ComputerEquipmentMember_1" xml:lang="en-US">Computers and peripheral equipment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ConcentrationRiskBenchmarkDomain_0" xml:lang="en-US">Concentration Risk Benchmark [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ConcentrationRiskByBenchmarkAxis_0" xml:lang="en-US">Concentration Risk Benchmark [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ConcentrationRiskByTypeAxis_0" xml:lang="en-US">Concentration Risk Type [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ConcentrationRiskCreditRisk_0" xml:lang="en-US">Concentration Risk, Credit Risk, Policy [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ConcentrationRiskCreditRisk_1" xml:lang="en-US">Concentration of Risks</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ConcentrationRiskPercentage1_0" xml:lang="en-US">Concentration Risk, Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ConcentrationRiskPercentage1_1" xml:lang="en-US">Concentration risk, percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ConcentrationRiskTypeDomain_0" xml:lang="en-US">Concentration Risk Type [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ConsolidationPolicyTextBlock_0" xml:lang="en-US">Consolidation, Policy [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ConsolidationPolicyTextBlock_1" xml:lang="en-US">Basis of presentation and consolidation</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock_0" xml:lang="en-US">Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock_1" xml:lang="en-US">Schedule of costs to obtain and fulfill a contract</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityCurrent_0" xml:lang="en-US">Contract with Customer, Liability, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityCurrent_1" xml:lang="en-US">Deferred revenue</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityCurrent_2" xml:lang="en-US">Deferred Revenue, Current, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityNoncurrent_0" xml:lang="en-US">Contract with Customer, Liability, Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityNoncurrent_1" xml:lang="en-US">Deferred revenue, noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityNoncurrent_2" xml:lang="en-US">Deferred Revenue, Noncurrent, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ConvertibleDebtFairValueDisclosures_0" xml:lang="en-US">Convertible Debt, Fair Value Disclosures</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ConvertibleDebtFairValueDisclosures_1" xml:lang="en-US">Warrants to purchase preferred and common stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ConvertibleDebtSecuritiesMember_0" xml:lang="en-US">Convertible Debt Securities [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ConvertibleDebtSecuritiesMember_1" xml:lang="en-US">Convertible and redeemable and convertible preferred stock [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ConvertiblePreferredStockMember_0" xml:lang="en-US">Convertible Preferred Stock [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ConvertiblePreferredStockMember_1" xml:lang="en-US">Convertible preferred stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ConvertiblePreferredStockMember_2" xml:lang="en-US">Convertible preferred stock, $ 0.0001 par value per share, 0 and 1,043,778 shares authorized, issued and outstanding as of September 30, 2021, and December 31, 2020, respectively; aggregate liquidation preference of 0 and $1,921 as of September 30, 2021, and December 31, 2020, respectively;</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion_0" xml:lang="en-US">Convertible Preferred Stock, Shares Issued upon Conversion</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion_1" xml:lang="en-US">Conversion of convertible preferred stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CostOfRevenue_0" xml:lang="en-US">Cost of Revenue</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CostOfRevenue_1" xml:lang="en-US">Total cost of revenue</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CostOfSalesMember_0" xml:lang="en-US">Cost of Sales [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_CostOfSalesMember_1" xml:lang="en-US">Cost of revenues</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CostsAndExpensesAbstract_0" xml:lang="en-US">Costs and Expenses [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_CostsAndExpensesAbstract_1" xml:lang="en-US">Cost of revenue:</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CreditFacilityAxis_0" xml:lang="en-US">Credit Facility [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CreditFacilityDomain_0" xml:lang="en-US">Credit Facility [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CustomerConcentrationRiskMember_0" xml:lang="en-US">Customer Concentration Risk [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_CustomerConcentrationRiskMember_1" xml:lang="en-US">Customer concentration risk</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CustomerRelationshipsMember_0" xml:lang="en-US">Customer Relationships [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CustomerRelationshipsMember_1" xml:lang="en-US">Customer relationships</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_CustomerRelationshipsMember_2" xml:lang="en-US">Customers relationship [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DebtDisclosureAbstract_0" xml:lang="en-US">Debt Disclosure [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_0" xml:lang="en-US">Debt Instrument, Basis Spread on Variable Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_1" xml:lang="en-US">Basis Spread on Variable Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_0" xml:lang="en-US">Debt Instrument, Description of Variable Rate Basis</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_1" xml:lang="en-US">Description of Variable Rate Basis</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount_0" xml:lang="en-US">Debt Instrument, Face Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount_1" xml:lang="en-US">Debt instrument, face amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DebtInstrumentInterestRateTerms_0" xml:lang="en-US">Debt Instrument, Interest Rate Terms</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_DebtInstrumentInterestRateTerms_1" xml:lang="en-US">Interest rate description of credit facility</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DeferredCosts_0" xml:lang="en-US">Deferred Costs, Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_DeferredCosts_1" xml:lang="en-US">Deferred contract acquisition and fulfillment costs, noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureTextBlock_0" xml:lang="en-US">Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DeferredCostsCurrent_0" xml:lang="en-US">Deferred Costs, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_DeferredCostsCurrent_1" xml:lang="en-US">Deferred contract acquisition and fulfillment costs, current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DeferredOfferingCosts_0" xml:lang="en-US">Deferred Offering Costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_DeferredOfferingCosts_1" xml:lang="en-US">Deferred offering costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense_0" xml:lang="en-US">Deferred Policy Acquisition Costs, Amortization Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense_1" xml:lang="en-US">Amortization of deferred contract acquisition and fulfillment costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DeferredRevenueCurrent_0" xml:lang="en-US">Deferred Revenue, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_DeferredRevenueCurrent_1" xml:lang="en-US">Deferred revenue</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DeferredRevenueNoncurrent_0" xml:lang="en-US">Deferred Revenue, Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_DeferredRevenueNoncurrent_1" xml:lang="en-US">Deferred revenue, noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DepositAssets_0" xml:lang="en-US">Deposit Assets</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DepositsAssetsCurrent_0" xml:lang="en-US">Deposits Assets, Current</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DevelopedTechnologyRightsMember_0" xml:lang="en-US">Developed Technology Rights [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_DevelopedTechnologyRightsMember_1" xml:lang="en-US">Developed technology</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DisaggregationOfRevenueLineItems_0" xml:lang="en-US">Disaggregation of Revenue [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DisaggregationOfRevenueTable_0" xml:lang="en-US">Disaggregation of Revenue [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DisaggregationOfRevenueTableTextBlock_0" xml:lang="en-US">Disaggregation of Revenue [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_DisaggregationOfRevenueTableTextBlock_1" xml:lang="en-US">Schedule of disaggregated revenue by category</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DisclosureTextBlockSupplementAbstract_0" xml:lang="en-US">Disclosure Text Block Supplement [Abstract]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_EarningsPerShareBasic_0" xml:lang="en-US">Earnings Per Share, Basic</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_EarningsPerShareBasic_1" xml:lang="en-US">Net loss per share attributable to common stockholders, basic (in dollars per share)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_EarningsPerShareBasic_2" xml:lang="en-US">Net loss per share attributable to common stockholders, basic</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_EarningsPerShareBasicAndDiluted_0" xml:lang="en-US">Earnings Per Share, Basic and Diluted</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_EarningsPerShareBasicAndDiluted_1" xml:lang="en-US">Net loss per share attributable to common stockholders, basic and diluted (in dollars per share)</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_EarningsPerShareBasicAndDiluted_3" xml:lang="en-US">Net loss per share attributable to common stockholders, basic and diluted</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_EarningsPerShareBasicAndDilutedOtherDisclosuresAbstract_0" xml:lang="en-US">Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_EarningsPerShareBasicAndDilutedOtherDisclosuresAbstract_1" xml:lang="en-US">Denominator:</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_EarningsPerShareTextBlock_1" xml:lang="en-US">NET LOSS PER SHARE ATTRIBUTABLE TO COMMON STOCKHOLDERS</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_0" xml:lang="en-US">Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_1" xml:lang="en-US">U.S. statutory effective tax rates</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_EMEAMember_0" xml:lang="en-US">EMEA [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_EMEAMember_1" xml:lang="en-US">Europe, the Middle East and Africa ("EMEA")</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_EMEAMember_2" xml:lang="en-US">EMEA</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_EmployeeRelatedLiabilitiesCurrent_0" xml:lang="en-US">Employee-related Liabilities, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_EmployeeRelatedLiabilitiesCurrent_1" xml:lang="en-US">Employees and payroll accruals</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_0" xml:lang="en-US">Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_0" xml:lang="en-US">Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_1" xml:lang="en-US">Total unrecognized compensation cost</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_EmployeeStockOptionMember_0" xml:lang="en-US">Share-based Payment Arrangement, Option [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_EmployeeStockOptionMember_1" xml:lang="en-US">Outstanding stock options [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_EntityWideRevenueMajorCustomerLineItems_0" xml:lang="en-US">Revenue, Major Customer [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_EquityAbstract_0" xml:lang="en-US">Equity [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_EquityComponentDomain_0" xml:lang="en-US">Equity Component [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_EurodollarMember_0" xml:lang="en-US">Eurodollar [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_EurodollarMember_1" xml:lang="en-US">Eurodollar</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_FairValueAdjustmentOfWarrants_0" xml:lang="en-US">Remeasurement of warrants to fair value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="lab_us-gaap_FairValueAdjustmentOfWarrants_1" xml:lang="en-US">Remeasurement of warrants to fair value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveLabel" xlink:label="lab_us-gaap_FairValueAdjustmentOfWarrants_2" xml:lang="en-US">Loss on fair value of warrants</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueAdjustmentOfWarrants_3" xml:lang="en-US">Fair Value Adjustment of Warrants</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FairValueAdjustmentOfWarrants_4" xml:lang="en-US">Change in fair value of warrants</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_FairValueAdjustmentOfWarrants_5" xml:lang="en-US">Change in valuation of warrants to purchase preferred and common stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_0" xml:lang="en-US">Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_0" xml:lang="en-US">Fair Value, Recurring and Nonrecurring [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_0" xml:lang="en-US">Fair Value Measurement Inputs and Valuation Techniques [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_0" xml:lang="en-US">Fair Value Measurement Inputs and Valuation Techniques [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_0" xml:lang="en-US">Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_1" xml:lang="en-US">Schedule of assumptions used in warrants' fair value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_0" xml:lang="en-US">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_1" xml:lang="en-US">Schedule of fair value measurement using significant unobservable inputs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_0" xml:lang="en-US">Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueByBalanceSheetGroupingTable_0" xml:lang="en-US">Fair Value, by Balance Sheet Grouping [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_0" xml:lang="en-US">Fair Value Hierarchy and NAV [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueByMeasurementBasisAxis_0" xml:lang="en-US">Measurement Basis [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueDisclosuresAbstract_0" xml:lang="en-US">Fair Value Disclosures [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueDisclosuresTextBlock_0" xml:lang="en-US">Fair Value Disclosures [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FairValueDisclosuresTextBlock_1" xml:lang="en-US">FAIR VALUE MEASUREMENT</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueInputsLevel1Member_0" xml:lang="en-US">Fair Value, Inputs, Level 1 [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_FairValueInputsLevel1Member_1" xml:lang="en-US">Level 1</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueInputsLevel2Member_0" xml:lang="en-US">Fair Value, Inputs, Level 2 [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FairValueInputsLevel2Member_1" xml:lang="en-US">Level 2</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueInputsLevel3Member_0" xml:lang="en-US">Fair Value, Inputs, Level 3 [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FairValueInputsLevel3Member_1" xml:lang="en-US">Level 3</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueMeasurementFrequencyDomain_0" xml:lang="en-US">Measurement Frequency [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_0" xml:lang="en-US">Fair Value Hierarchy and NAV [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueMeasurementsRecurringMember_0" xml:lang="en-US">Fair Value, Recurring [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FinanceLeaseLiability_0" xml:lang="en-US">Finance Lease, Liability</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_FinanceLeaseLiability_1" xml:lang="en-US">Present value of net minimum lease payments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FinanceLeaseLiabilityCurrent_0" xml:lang="en-US">Finance Lease, Liability, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FinanceLeaseLiabilityMaturityTableTextBlock_0" xml:lang="en-US">Finance Lease, Liability, Fiscal Year Maturity [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FinanceLeaseLiabilityMaturityTableTextBlock_1" xml:lang="en-US">Schedule of future minimum lease payments under capital leases</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FinanceLeaseLiabilityPaymentsDue_0" xml:lang="en-US">Finance Lease, Liability, Payment, Due</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_FinanceLeaseLiabilityPaymentsDue_1" xml:lang="en-US">Total minimum lease payments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_0" xml:lang="en-US">Finance Lease, Liability, to be Paid, Year One</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_1" xml:lang="en-US">Reminder of 2021</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_0" xml:lang="en-US">Finance Lease, Liability, to be Paid, Year Three</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_0" xml:lang="en-US">Finance Lease, Liability, to be Paid, Year Two</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_1" xml:lang="en-US">2022</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_0" xml:lang="en-US">Less: Amount representing interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_1" xml:lang="en-US">Finance Lease, Liability, Undiscounted Excess Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_0" xml:lang="en-US">Accumulated amortization and impairments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_1" xml:lang="en-US">Finite-Lived Intangible Assets, Accumulated Amortization</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_2" xml:lang="en-US">Accumulated amortization and impairments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable_0" xml:lang="en-US">Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_0" xml:lang="en-US">Finite-Lived Intangible Asset, Expected Amortization, after Year Five</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_1" xml:lang="en-US">2026 and thereafter</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_0" xml:lang="en-US">Finite-Lived Intangible Asset, Expected Amortization, Year One</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_1" xml:lang="en-US">Remaining 2021</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_2" xml:lang="en-US">2022</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_0" xml:lang="en-US">Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_1" xml:lang="en-US">Remaining 2021</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_0" xml:lang="en-US">Finite-Lived Intangible Asset, Expected Amortization, Year Five</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_1" xml:lang="en-US">2025</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_0" xml:lang="en-US">Finite-Lived Intangible Asset, Expected Amortization, Year Four</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_1" xml:lang="en-US">2024</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_2" xml:lang="en-US">2025</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_0" xml:lang="en-US">Finite-Lived Intangible Asset, Expected Amortization, Year Three</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_1" xml:lang="en-US">2024</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_0" xml:lang="en-US">Finite-Lived Intangible Asset, Expected Amortization, Year Two</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_1" xml:lang="en-US">2022</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_2" xml:lang="en-US">2023</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0" xml:lang="en-US">Finite-Lived Intangible Assets by Major Class [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsFairValueDisclosure_0" xml:lang="en-US">Finite-lived Intangible Assets, Fair Value Disclosure</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsFairValueDisclosure_1" xml:lang="en-US">Fair Value of identified intangible assets acquired</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsGross_0" xml:lang="en-US">Finite-Lived Intangible Assets, Gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsGross_1" xml:lang="en-US">Gross carrying amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsLineItems_0" xml:lang="en-US">Finite-Lived Intangible Assets [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_0" xml:lang="en-US">Finite-Lived Intangible Assets, Major Class Name [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsNet_0" xml:lang="en-US">Finite-Lived Intangible Assets, Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsNet_1" xml:lang="en-US">Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsNet_2" xml:lang="en-US">Intangible assets, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetUsefulLife_0" xml:lang="en-US">Finite-Lived Intangible Asset, Useful Life</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetUsefulLife_1" xml:lang="en-US">Estimated Useful Life</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="lab_us-gaap_ForeignCurrencyTransactionGainBeforeTax_0" xml:lang="en-US">Foreign currency translation adjustment, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ForeignCurrencyTransactionGainBeforeTax_1" xml:lang="en-US">Foreign Currency Transaction Gain, before Tax</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ForeignCurrencyTransactionGainBeforeTax_2" xml:lang="en-US">Foreign currency translation adjustment, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_ForeignCurrencyTransactionGainBeforeTax_3" xml:lang="en-US">Foreign Currency Transaction Gain (Loss), before Tax, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="lab_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_0" xml:lang="en-US">Foreign currency translation adjustment, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_1" xml:lang="en-US">Foreign Currency Transaction Gain (Loss), before Tax</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_2" xml:lang="en-US">Foreign currency translation adjustment, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_3" xml:lang="en-US">Foreign Currency Transaction Gain (Loss), before Tax, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ForeignCurrencyTransactionLossBeforeTax_0" xml:lang="en-US">Foreign Currency Transaction Loss, before Tax</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ForeignCurrencyTransactionLossBeforeTax_1" xml:lang="en-US">Foreign currency translation adjustment, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FurnitureAndFixturesMember_0" xml:lang="en-US">Furniture and Fixtures [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FurnitureAndFixturesMember_1" xml:lang="en-US">Office furniture and equipment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_GainLossOnDispositionOfAssets_0" xml:lang="en-US">Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_GainLossOnDispositionOfAssets_1" xml:lang="en-US">Abandonment costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_0" xml:lang="en-US">Gain on sale of property and equipment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_1" xml:lang="en-US">Gain (Loss) on Disposition of Property Plant Equipment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_GeneralAndAdministrativeExpense_0" xml:lang="en-US">General and Administrative Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_GeneralAndAdministrativeExpense_1" xml:lang="en-US">General and administrative</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_GeneralAndAdministrativeExpenseMember_0" xml:lang="en-US">General and Administrative Expense [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_GeneralAndAdministrativeExpenseMember_1" xml:lang="en-US">General and administrative</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_GeographicAreasRevenuesFromExternalCustomersAbstract_0" xml:lang="en-US">Geographic Areas, Revenues from External Customers [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="lab_us-gaap_Goodwill_0" xml:lang="en-US">Balance as of June 30, 2021</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="lab_us-gaap_Goodwill_1" xml:lang="en-US">Balance as of December 31, 2020</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_Goodwill_2" xml:lang="en-US">Goodwill</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_Goodwill_3" xml:lang="en-US">Goodwill</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_GoodwillAcquiredDuringPeriod_0" xml:lang="en-US">Goodwill, Acquired During Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_GoodwillAcquiredDuringPeriod_1" xml:lang="en-US">Goodwill acquired during the year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_0" xml:lang="en-US">Goodwill and Intangible Assets Disclosure [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock_0" xml:lang="en-US">Goodwill and Intangible Assets Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock_1" xml:lang="en-US">GOODWILL AND INTANGIBLE ASSETS, NET</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_GoodwillLineItems_0" xml:lang="en-US">Goodwill [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_GovernmentContractReceivable_0" xml:lang="en-US">Government Contract Receivable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_GovernmentContractReceivable_1" xml:lang="en-US">Government institutions</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_GrossProfit_0" xml:lang="en-US">Gross Profit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_GrossProfit_1" xml:lang="en-US">Gross profit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_GrossProfit_2" xml:lang="en-US">Gross profit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_0" xml:lang="en-US">Loss before provision for income taxes</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_1" xml:lang="en-US">Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_2" xml:lang="en-US">Loss before income taxes</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncomeStatementAbstract_0" xml:lang="en-US">Income Statement [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncomeStatementLocationAxis_0" xml:lang="en-US">Income Statement Location [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncomeStatementLocationDomain_0" xml:lang="en-US">Income Statement Location [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncomeTaxDisclosureTextBlock_0" xml:lang="en-US">Income Tax Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_IncomeTaxDisclosureTextBlock_1" xml:lang="en-US">PROVISION FOR INCOME TAXES</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_IncomeTaxesPaid_0" xml:lang="en-US">Cash paid for income taxes, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncomeTaxesPaid_1" xml:lang="en-US">Income Taxes Paid</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_IncomeTaxesPaid_2" xml:lang="en-US">Cash paid for income taxes, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncomeTaxesPaidNetAbstract_0" xml:lang="en-US">Income Taxes Paid, Net [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit_0" xml:lang="en-US">Provision for income taxes</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit_1" xml:lang="en-US">Recognized income tax expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit_2" xml:lang="en-US">Income Tax Expense (Benefit)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit_3" xml:lang="en-US">Provision for income taxes</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit_4" xml:lang="en-US">Recognized income tax expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsPayable_0" xml:lang="en-US">Increase (Decrease) in Accounts Payable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsPayable_1" xml:lang="en-US">Increase (Decrease) in Accounts Payable, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsPayable_2" xml:lang="en-US">Increase in trade payables</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsPayableTrade_0" xml:lang="en-US">Increase (Decrease) in Accounts Payable, Trade</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsPayableTrade_1" xml:lang="en-US">Decrease in trade payables</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_0" xml:lang="en-US">Increase in trade receivables</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_1" xml:lang="en-US">Increase (Decrease) in Accounts Receivable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_2" xml:lang="en-US">Increase (Decrease) in Receivables, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_3" xml:lang="en-US">Increase in trade receivables</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_0" xml:lang="en-US">Increase (Decrease) in Income Taxes Payable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_1" xml:lang="en-US">Decrease in trade payables</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_0" xml:lang="en-US">Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_1" xml:lang="en-US">Increase in accrued expenses and other current liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInDeferredRevenue_0" xml:lang="en-US">Payment of deferred offering costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncreaseDecreaseInDeferredRevenue_1" xml:lang="en-US">Increase (Decrease) in Deferred Revenue</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInDeferredRevenue_2" xml:lang="en-US">Increase in deferred revenue</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInDeferredRevenue_3" xml:lang="en-US">Increase (decrease) in deferred revenue</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_0" xml:lang="en-US">Increase (Decrease) in Employee Related Liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_1" xml:lang="en-US">Increase in employees and payroll accruals</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_0" xml:lang="en-US">Increase (Decrease) in Operating Capital [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_1" xml:lang="en-US">Changes in operating assets and liabilities:</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_0" xml:lang="en-US">Increase (Decrease) in Other Noncurrent Liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_1" xml:lang="en-US">Increase (decrease) in other liabilities, noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_0" xml:lang="en-US">Decrease (increase) in prepaid expenses and other current assets and other assets, noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_1" xml:lang="en-US">Increase (Decrease) in Prepaid Expense and Other Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_2" xml:lang="en-US">Increase in prepaid expenses and other current assets and other assets, noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInReceivables_0" xml:lang="en-US">Increase in trade receivables</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncreaseDecreaseInReceivables_1" xml:lang="en-US">Increase (Decrease) in Receivables</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInReceivables_2" xml:lang="en-US">Increase in trade receivables</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_0" xml:lang="en-US">Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_1" xml:lang="en-US">Outstanding stock options</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_0" xml:lang="en-US">Intangible Assets, Net (Excluding Goodwill)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_1" xml:lang="en-US">Intangible assets, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_InterestExpense_0" xml:lang="en-US">Interest Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_InterestExpense_1" xml:lang="en-US">Interest expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_InterestExpenseOther_0" xml:lang="en-US">Interest Expense, Other</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_InterestExpenseOther_1" xml:lang="en-US">Other</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_InterestIncomeDepositsWithFinancialInstitutions_0" xml:lang="en-US">Interest Income, Deposits with Financial Institutions</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_InterestIncomeDepositsWithFinancialInstitutions_1" xml:lang="en-US">Interest Income, Deposits with Financial Institutions, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_InterestIncomeDepositsWithFinancialInstitutions_2" xml:lang="en-US">Interest income</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_InterestIncomeExpenseNet_0" xml:lang="en-US">Interest Income (Expense), Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_InterestIncomeOther_0" xml:lang="en-US">Interest Income, Other</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_InterestIncomeOther_1" xml:lang="en-US">Interest Income (Expense), Net, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_InterestIncomeOther_2" xml:lang="en-US">Interest income</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_InterestPaidNet_0" xml:lang="en-US">Cash paid for interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_InterestPaidNet_1" xml:lang="en-US">Interest Paid, Excluding Capitalized Interest, Operating Activities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_InterestPaidNet_2" xml:lang="en-US">Cash paid for interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_InvestorMember_0" xml:lang="en-US">Investor [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_InvestorMember_1" xml:lang="en-US">Investor</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IPOMember_0" xml:lang="en-US">IPO [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_IPOMember_1" xml:lang="en-US">Initial public offering (&#8220;IPO&#8221;)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims_0" xml:lang="en-US">Issuance of Stock and Warrants for Services or Claims</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims_1" xml:lang="en-US">Change in valuation of warrants to purchase preferred and common stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LeaseholdImprovementsMember_0" xml:lang="en-US">Leasehold Improvements [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_LeaseholdImprovementsMember_1" xml:lang="en-US">Leasehold improvements</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LeaseholdsAndLeaseholdImprovementsMember_0" xml:lang="en-US">Leaseholds and Leasehold Improvements [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_LeaseholdsAndLeaseholdImprovementsMember_1" xml:lang="en-US">Capital leases of computers and peripheral equipment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_0" xml:lang="en-US">Lessee, Operating Lease, Liability, Maturity [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_1" xml:lang="en-US">Schedule of Future minimum annual payments under non-cancelable operating leases</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_0" xml:lang="en-US">Lessee, Operating Lease, Liability, to be Paid</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_1" xml:lang="en-US">Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_0" xml:lang="en-US">Lessee, Operating Lease, Liability, to be Paid, Year One</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_1" xml:lang="en-US">Remaining 2021</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_0" xml:lang="en-US">Lessee, Operating Lease, Liability, to be Paid, Year Two</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_1" xml:lang="en-US">2022</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_Liabilities_0" xml:lang="en-US">Liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_Liabilities_1" xml:lang="en-US">TOTAL LIABILITIES</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LiabilitiesAbstract_0" xml:lang="en-US">Liabilities [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_LiabilitiesAbstract_1" xml:lang="en-US">LIABILITIES</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquity_0" xml:lang="en-US">Liabilities and Equity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquity_1" xml:lang="en-US">TOTAL LIABILITIES, CONVERTIBLE AND REDEEMABLE CONVERTIBLE PREFERRED STOCKS AND STOCKHOLDERS&#8217; EQUITY (DEFICIT)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_0" xml:lang="en-US">Liabilities and Equity [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1" xml:lang="en-US">LIABILITIES, CONVERTIBLE AND REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LiabilitiesCurrent_0" xml:lang="en-US">Liabilities, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_LiabilitiesCurrent_1" xml:lang="en-US">Total current liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LiabilitiesCurrentAbstract_0" xml:lang="en-US">Liabilities, Current [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_LiabilitiesCurrentAbstract_1" xml:lang="en-US">CURRENT LIABILITIES</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LiabilitiesNoncurrent_0" xml:lang="en-US">Liabilities, Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_LiabilitiesNoncurrent_1" xml:lang="en-US">Total non-current liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LiabilitiesNoncurrentAbstract_0" xml:lang="en-US">Liabilities, Noncurrent [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_LiabilitiesNoncurrentAbstract_1" xml:lang="en-US">NON-CURRENT LIABILITIES</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_0" xml:lang="en-US">Line of Credit Facility, Current Borrowing Capacity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LineOfCreditFacilityFrequencyOfPayments_0" xml:lang="en-US">Line of Credit Facility, Frequency of Payments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LineOfCreditFacilityLineItems_0" xml:lang="en-US">Line of Credit Facility [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_0" xml:lang="en-US">Line of Credit Facility, Maximum Borrowing Capacity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_1" xml:lang="en-US">Aggregate principal amount of credit facility</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LineOfCreditFacilityPeriodicPayment_0" xml:lang="en-US">Line of Credit Facility, Periodic Payment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LineOfCreditFacilityTable_0" xml:lang="en-US">Line of Credit Facility [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LondonInterbankOfferedRateLIBORMember_0" xml:lang="en-US">London Interbank Offered Rate (LIBOR) [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_LondonInterbankOfferedRateLIBORMember_1" xml:lang="en-US">LIBOR</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LongTermDebt_0" xml:lang="en-US">Long-term Debt</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_LongTermDebt_1" xml:lang="en-US">Long-term loans, total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LongTermDebtCurrent_0" xml:lang="en-US">Long-term Debt, Current Maturities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_LongTermDebtCurrent_1" xml:lang="en-US">Current portion of long-term loans</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_0" xml:lang="en-US">Long-Term Debt, Maturity, Year One</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_1" xml:lang="en-US">2022</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_0" xml:lang="en-US">Long-Term Debt, Maturity, Year Four</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_1" xml:lang="en-US">2024</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_0" xml:lang="en-US">Long-Term Debt, Maturity, Year Three</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_1" xml:lang="en-US">2024</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_0" xml:lang="en-US">Long-Term Debt, Maturity, Year Two</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_1" xml:lang="en-US">2023</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear_0" xml:lang="en-US">Long-Term Debt, Maturity, Remainder of Fiscal Year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear_1" xml:lang="en-US">Remaining 2021</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LongTermDebtNoncurrent_0" xml:lang="en-US">Long-term Debt, Excluding Current Maturities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_LongTermDebtNoncurrent_1" xml:lang="en-US">Long-term loans, net of current portion</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LongTermDebtTextBlock_0" xml:lang="en-US">Long-term Debt [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_LongTermDebtTextBlock_1" xml:lang="en-US">LONG-TERM LOAN</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_MeasurementInputExpectedDividendRateMember_0" xml:lang="en-US">Measurement Input, Expected Dividend Rate [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_MeasurementInputExpectedDividendRateMember_1" xml:lang="en-US">Dividend yield</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_MeasurementInputExpectedTermMember_0" xml:lang="en-US">Measurement Input, Expected Term [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_MeasurementInputExpectedTermMember_1" xml:lang="en-US">Expected life (years)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_MeasurementInputOptionVolatilityMember_0" xml:lang="en-US">Measurement Input, Option Volatility [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_MeasurementInputPriceVolatilityMember_0" xml:lang="en-US">Measurement Input, Price Volatility [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_MeasurementInputPriceVolatilityMember_1" xml:lang="en-US">Volatility</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_MeasurementInputRiskFreeInterestRateMember_0" xml:lang="en-US">Measurement Input, Risk Free Interest Rate [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_MeasurementInputRiskFreeInterestRateMember_1" xml:lang="en-US">Risk-free interest rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_MeasurementInputTypeAxis_0" xml:lang="en-US">Measurement Input Type [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_MeasurementInputTypeDomain_0" xml:lang="en-US">Measurement Input Type [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NatureOfOperations_0" xml:lang="en-US">Nature of Operations [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_NatureOfOperations_1" xml:lang="en-US">BUSINESS</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_0" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_1" xml:lang="en-US">Net cash provided by financing activities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_0" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_1" xml:lang="en-US">Cash flows from financing activities:</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_0" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_1" xml:lang="en-US">Net cash used in investing&#160;activities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_0" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_1" xml:lang="en-US">Cash flows from investing activities:</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_0" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_1" xml:lang="en-US">Net cash provided by (used in) operating activities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_0" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_1" xml:lang="en-US">Cash flows from operating activities:</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:label="lab_us-gaap_NetIncomeLoss_0" xml:lang="en-US">Net loss</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:label="lab_us-gaap_NetIncomeLoss_1" xml:lang="en-US">Net loss</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NetIncomeLoss_2" xml:lang="en-US">Net Income (Loss) Attributable to Parent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_NetIncomeLoss_3" xml:lang="en-US">Net income</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_NetIncomeLoss_4" xml:lang="en-US">Net loss</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_NetIncomeLoss_5" xml:lang="en-US">Net loss</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_0" xml:lang="en-US">Total loss attributable to common stockholders, for basic and diluted net loss per share</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:label="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_1" xml:lang="en-US">Net loss attributable to common stockholders</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_2" xml:lang="en-US">Net Income (Loss) Available to Common Stockholders, Basic</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_3" xml:lang="en-US">Total loss attributable to common stockholders, for basic and diluted net loss per share</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_4" xml:lang="en-US">Net loss per share attributable to common stockholders, basic and diluted</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract_0" xml:lang="en-US">Net Income (Loss) Available to Common Stockholders, Basic [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract_1" xml:lang="en-US">Numerator:</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_0" xml:lang="en-US">New Accounting Pronouncements, Policy [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_1" xml:lang="en-US">Recently Adopted Accounting Pronouncements</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_NonoperatingIncomeExpense_0" xml:lang="en-US">Financial expenses, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:label="lab_us-gaap_NonoperatingIncomeExpense_1" xml:lang="en-US">Financial expenses, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NonoperatingIncomeExpense_2" xml:lang="en-US">Nonoperating Income (Expense)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_NonoperatingIncomeExpense_3" xml:lang="en-US">Financial expenses (income), net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_NonoperatingIncomeExpense_4" xml:lang="en-US">Financial expenses, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_NonoperatingIncomeExpense_5" xml:lang="en-US">Financial expenses, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OfficeEquipmentMember_0" xml:lang="en-US">Office Equipment [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OperatingExpenses_0" xml:lang="en-US">Operating Expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_OperatingExpenses_1" xml:lang="en-US">Total operating expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_OperatingExpenses_2" xml:lang="en-US">Operating expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OperatingExpensesAbstract_0" xml:lang="en-US">Operating Expenses [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_OperatingExpensesAbstract_1" xml:lang="en-US">Operating expenses:</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:label="lab_us-gaap_OperatingIncomeLoss_0" xml:lang="en-US">Operating loss</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OperatingIncomeLoss_1" xml:lang="en-US">Operating Income (Loss)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_OperatingIncomeLoss_2" xml:lang="en-US">Operating loss</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OperatingLeaseLiabilityCurrent_0" xml:lang="en-US">Operating Lease, Liability, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_OperatingLeaseLiabilityCurrent_1" xml:lang="en-US">Current portion of long-term lease liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_0" xml:lang="en-US">Operating Lease, Liability, Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_1" xml:lang="en-US">Long-term lease liabilities, net of current portion</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_0" xml:lang="en-US">Operating Leases, Future Minimum Payments Due</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_1" xml:lang="en-US">Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsNextRollingTwelveMonths_0" xml:lang="en-US">Operating Leases, Future Minimum Payments, Next Rolling Twelve Months</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsNextRollingTwelveMonths_1" xml:lang="en-US">2022</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear_0" xml:lang="en-US">Operating Leases, Future Minimum Payments, Remainder of Fiscal Year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear_1" xml:lang="en-US">Remaining 2021</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OtherAccruedLiabilitiesCurrent_0" xml:lang="en-US">Other Accrued Liabilities, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_OtherAccruedLiabilitiesCurrent_1" xml:lang="en-US">Other</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OtherAssetsCurrent_0" xml:lang="en-US">Other Assets, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_OtherAssetsCurrent_1" xml:lang="en-US">Other</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OtherAssetsMiscellaneousNoncurrent_0" xml:lang="en-US">Other Assets, Miscellaneous, Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_OtherAssetsMiscellaneousNoncurrent_1" xml:lang="en-US">Other</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OtherAssetsNoncurrent_0" xml:lang="en-US">Other Assets, Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_OtherAssetsNoncurrent_1" xml:lang="en-US">Other assets, noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_OtherAssetsNoncurrent_2" xml:lang="en-US">Total other assets, noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OtherAssetsNoncurrentDisclosureAbstract_0" xml:lang="en-US">Other Assets, Noncurrent Disclosure [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OtherGeneralExpense_0" xml:lang="en-US">Other General Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_OtherGeneralExpense_1" xml:lang="en-US">Other operating expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_OtherGeneralExpense_2" xml:lang="en-US">Expenses on forgiveness of loans</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OtherLiabilitiesNoncurrent_0" xml:lang="en-US">Other Liabilities, Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_OtherLiabilitiesNoncurrent_1" xml:lang="en-US">Other liabilities, noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OtherNonoperatingIncomeExpense_0" xml:lang="en-US">Other Nonoperating Income (Expense)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OtherOperatingIncomeExpenseMember_0" xml:lang="en-US">Other Operating Income (Expense) [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_OtherOperatingIncomeExpenseMember_1" xml:lang="en-US">Other operating expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OtherReceivablesNetCurrent_0" xml:lang="en-US">Other Receivables, Net, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_OtherReceivablesNetCurrent_1" xml:lang="en-US">Government institutions</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_OtherReceivablesNetCurrent_2" xml:lang="en-US">Other Receivables, Net, Current, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveLabel" xlink:label="lab_us-gaap_PaymentsForCommissions_0" xml:lang="en-US">Underwriting discounts and commissions</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PaymentsForCommissions_1" xml:lang="en-US">Payments for Commissions</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_PaymentsForCommissions_2" xml:lang="en-US">Underwriting discounts and commissions</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_PaymentsForRepurchaseOfInitialPublicOffering_0" xml:lang="en-US">Payment related to the conversion of Series F redeemable convertible preferred stock upon initial public offering</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PaymentsForRepurchaseOfInitialPublicOffering_1" xml:lang="en-US">Payments for Repurchase of Initial Public Offering</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_PaymentsForSoftware_0" xml:lang="en-US">Capitalized internal-use software</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PaymentsForSoftware_1" xml:lang="en-US">Payments for Software</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_PaymentsForSoftware_2" xml:lang="en-US">Payments for Software, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_PaymentsForSoftware_3" xml:lang="en-US">Capitalized internal-use software</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_PaymentsOfStockIssuanceCosts_0" xml:lang="en-US">Payment of deferred offering costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveLabel" xlink:label="lab_us-gaap_PaymentsOfStockIssuanceCosts_1" xml:lang="en-US">Other issuance costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PaymentsOfStockIssuanceCosts_2" xml:lang="en-US">Payments of Stock Issuance Costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PaymentsOfStockIssuanceCosts_3" xml:lang="en-US">Payment of deferred offering costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_PaymentsOfStockIssuanceCosts_4" xml:lang="en-US">Othe issuance costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_PaymentsToAcquireIntangibleAssets_0" xml:lang="en-US">Purchase of intangible assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PaymentsToAcquireIntangibleAssets_1" xml:lang="en-US">Payments to Acquire Intangible Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_PaymentsToAcquireIntangibleAssets_2" xml:lang="en-US">Purchase of intangible assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_0" xml:lang="en-US">Purchases of property and equipment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_1" xml:lang="en-US">Payments to Acquire Property, Plant, and Equipment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_2" xml:lang="en-US">Purchases of property and equipment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_PaymentsToAcquireSoftware_0" xml:lang="en-US">Capitalized internal-use software</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PaymentsToAcquireSoftware_1" xml:lang="en-US">Payments to Acquire Software</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_PaymentsToAcquireSoftware_2" xml:lang="en-US">Capitalized internal-use software</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PlanNameAxis_0" xml:lang="en-US">Plan Name [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PlanNameDomain_0" xml:lang="en-US">Plan Name [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_PreferredStockAccretionOfRedemptionDiscount_0" xml:lang="en-US">Accretion of redeemable convertible preferred stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PreferredStockAccretionOfRedemptionDiscount_1" xml:lang="en-US">Preferred Stock, Accretion of Redemption Discount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_PreferredStockAccretionOfRedemptionDiscount_2" xml:lang="en-US">Accretion of redeemable convertible preferred stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PreferredStockConvertibleConversionRatio_0" xml:lang="en-US">Preferred Stock, Convertible, Conversion Ratio</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PreferredStockParOrStatedValuePerShare_0" xml:lang="en-US">Preferred Stock, Par or Stated Value Per Share</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PreferredStockParOrStatedValuePerShare_1" xml:lang="en-US">Preferred stock, par value (in dollars per share)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_PreferredStockRedemptionDiscount_0" xml:lang="en-US">Redemption of redeemable convertible preferred stock upon initial public offering</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PreferredStockRedemptionDiscount_1" xml:lang="en-US">Preferred Stock Redemption Discount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_PreferredStockRedemptionDiscount_2" xml:lang="en-US">Redemption of redeemable convertible preferred stock upon initial public offering</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PreferredStockRedemptionPremium_0" xml:lang="en-US">Proceeds from Issuance of Preferred Stock and Preference Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PreferredStockRedemptionPremium_1" xml:lang="en-US">Preferred stock accretion</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PreferredStockSharesAuthorized_0" xml:lang="en-US">Preferred Stock, Shares Authorized</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PreferredStockSharesAuthorized_1" xml:lang="en-US">Preferred stock, shares authorized</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PreferredStockSharesIssued_0" xml:lang="en-US">Preferred Stock, Shares Issued</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PreferredStockSharesIssued_1" xml:lang="en-US">Preferred stock, shares issued</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PreferredStockSharesOutstanding_0" xml:lang="en-US">Preferred Stock, Shares Outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PreferredStockSharesOutstanding_1" xml:lang="en-US">Preferred stock, shares outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PreferredStockValue_0" xml:lang="en-US">Preferred Stock, Value, Issued</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PreferredStockValue_1" xml:lang="en-US">Preferred stock, $0.0001 par value per share, 20,000,000 and 0 shares authorized as of September 30, 2021 and December 31, 2020, respectively; 0 issued and outstanding as of September 30, 2021 and December 31, 2020</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PrepaidExpenseAndOtherAssets_0" xml:lang="en-US">Prepaid Expense and Other Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PrepaidExpenseAndOtherAssets_1" xml:lang="en-US">Prepaid expenses and other current assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PrepaidExpenseAndOtherAssetsAbstract_0" xml:lang="en-US">Prepaid Expense and Other Assets [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_0" xml:lang="en-US">Prepaid Expense and Other Assets, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_1" xml:lang="en-US">Total prepaid expenses and other current assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PrepaidExpenseCurrent_0" xml:lang="en-US">Prepaid Expense, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PrepaidExpenseCurrent_1" xml:lang="en-US">Prepaid expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ProceedsFromCommissionsReceived_0" xml:lang="en-US">Proceeds from Commissions Received</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ProceedsFromCommissionsReceived_1" xml:lang="en-US">Proceeds from commissions received</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ProceedsFromDebtNetOfIssuanceCosts_0" xml:lang="en-US">Proceeds from Debt, Net of Issuance Costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_ProceedsFromDebtNetOfIssuanceCosts_1" xml:lang="en-US">Proceeds from Issuance of Long-term Debt, Total</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ProceedsFromIssuanceInitialPublicOffering_0" xml:lang="en-US">Proceeds from Issuance Initial Public Offering</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ProceedsFromIssuanceInitialPublicOffering_1" xml:lang="en-US">Proceeds from initial public offering, net of underwriting discounts and commissions</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ProceedsFromIssuanceInitialPublicOffering_2" xml:lang="en-US">Net proceeds after deducting underwriting discounts</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt_1" xml:lang="en-US">Proceeds from long term loans, net of debt issuance cost</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfWarrants_0" xml:lang="en-US">Proceeds from Issuance of Warrants</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfWarrants_1" xml:lang="en-US">Issuance of warrants</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_0" xml:lang="en-US">Proceeds from Sale of Property, Plant, and Equipment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_1" xml:lang="en-US">Proceeds from sale of property and equipment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_ProceedsFromStockOptionsExercised_0" xml:lang="en-US">Proceeds from exercise of options by employees</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ProceedsFromStockOptionsExercised_1" xml:lang="en-US">Proceeds from Stock Options Exercised</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ProceedsFromStockOptionsExercised_2" xml:lang="en-US">Proceeds from exercise of options by employees</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentAbstract_0" xml:lang="en-US">Property, Plant and Equipment [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_0" xml:lang="en-US">Long-Lived Tangible Asset [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_0" xml:lang="en-US">Property, Plant and Equipment Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_1" xml:lang="en-US">PROPERTY AND EQUIPMENT, NET</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentDisposals_0" xml:lang="en-US">Property, Plant and Equipment, Disposals</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentDisposals_1" xml:lang="en-US">General and administrative expenses and disposed total assets gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentGross_0" xml:lang="en-US">Property, Plant and Equipment, Gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentGross_1" xml:lang="en-US">Cost</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentLineItems_0" xml:lang="en-US">Property, Plant and Equipment [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveTerseLabel" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_0" xml:lang="en-US">Long-lived assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_1" xml:lang="en-US">Property, Plant and Equipment, Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_2" xml:lang="en-US">Property and equipment, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_3" xml:lang="en-US">Depreciated cost</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_4" xml:lang="en-US">Depreciated cost</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentTextBlock_0" xml:lang="en-US">Property, Plant and Equipment [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentTextBlock_1" xml:lang="en-US">Schedule of property and equipment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_0" xml:lang="en-US">Long-Lived Tangible Asset [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PurchaseObligation_0" xml:lang="en-US">Purchase Obligation</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_PurchaseObligation_1" xml:lang="en-US">Total purchase commitment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PurchaseObligationDueInFifthYear_0" xml:lang="en-US">Purchase Obligation, to be Paid, Year Five</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PurchaseObligationDueInFifthYear_1" xml:lang="en-US">2026</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PurchaseObligationDueInFourthYear_0" xml:lang="en-US">Purchase Obligation, to be Paid, Year Four</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_PurchaseObligationDueInFourthYear_1" xml:lang="en-US">2025</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PurchaseObligationDueInNextTwelveMonths_0" xml:lang="en-US">Purchase Obligation, to be Paid, Year One</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PurchaseObligationDueInNextTwelveMonths_1" xml:lang="en-US">Remaining 2021</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_PurchaseObligationDueInNextTwelveMonths_2" xml:lang="en-US">2022</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PurchaseObligationDueInSecondYear_0" xml:lang="en-US">Purchase Obligation, to be Paid, Year Two</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_PurchaseObligationDueInSecondYear_1" xml:lang="en-US">2023</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PurchaseObligationDueInThirdYear_0" xml:lang="en-US">Purchase Obligation, to be Paid, Year Three</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_PurchaseObligationDueInThirdYear_1" xml:lang="en-US">2024</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PurchaseObligationFutureMinimumPaymentsRemainderOfFiscalYear_0" xml:lang="en-US">Purchase Obligation, to be Paid, Remainder of Fiscal Year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PurchaseObligationFutureMinimumPaymentsRemainderOfFiscalYear_1" xml:lang="en-US">Remaining 2021</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_ReceivableFromShareholdersOrAffiliatesForIssuanceOfCapitalStock_0" xml:lang="en-US">Receivables on account of stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ReceivableFromShareholdersOrAffiliatesForIssuanceOfCapitalStock_1" xml:lang="en-US">Receivable from Shareholders or Affiliates for Issuance of Capital Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ReceivableFromShareholdersOrAffiliatesForIssuanceOfCapitalStock_2" xml:lang="en-US">Receivables on account of stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ReceivablesFromStockholderMember_0" xml:lang="en-US">Receivables from Stockholder [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ReceivablesFromStockholderMember_1" xml:lang="en-US">Receivables on account of stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ReceivablesNetCurrent_0" xml:lang="en-US">Receivables, Net, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ReceivablesNetCurrent_1" xml:lang="en-US">Trade receivables</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RedeemableConvertiblePreferredStockMember_0" xml:lang="en-US">Redeemable Convertible Preferred Stock [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_RedeemableConvertiblePreferredStockMember_1" xml:lang="en-US">Redeemable convertible preferred stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_RedeemableConvertiblePreferredStockMember_2" xml:lang="en-US">Redeemable convertible preferred stock, $ 0.0001 par value per share, 0 and 15,968,831 shares authorized as of September 30, 2021, and December 31, 2020, respectively; 0 and 15,779,322 issued and outstanding as of September 30, 2021, and December 31, 2020, respectively; aggregate liquidation preference of 0 and $185,425 as of September 30, 2021, and December 31, 2020, respectively;</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RedeemablePreferredStockMember_0" xml:lang="en-US">Redeemable Preferred Stock [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_RedeemablePreferredStockMember_1" xml:lang="en-US">Redeemable Preferred Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RelatedPartyDomain_0" xml:lang="en-US">Related Party [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RelatedPartyTransactionDescriptionOfTransaction_0" xml:lang="en-US">Related Party Transaction, Description of Transaction</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_RelatedPartyTransactionDescriptionOfTransaction_1" xml:lang="en-US">Description of related party transaction</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RelatedPartyTransactionLineItems_0" xml:lang="en-US">Related Party Transaction [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RelatedPartyTransactionsAbstract_0" xml:lang="en-US">Related Party Transactions [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_0" xml:lang="en-US">Related Party [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_0" xml:lang="en-US">Related Party Transactions Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_1" xml:lang="en-US">RELATED PARTY TRANSACTIONS</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_RepaymentsOfDebt_0" xml:lang="en-US">Repayment of long-term loans</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RepaymentsOfDebt_1" xml:lang="en-US">Repayments of Debt</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_RepaymentsOfLongTermCapitalLeaseObligations_0" xml:lang="en-US">Principal payments on finance leases</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RepaymentsOfLongTermCapitalLeaseObligations_1" xml:lang="en-US">Repayments of Long-term Capital Lease Obligations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ResearchAndDevelopmentExpense_0" xml:lang="en-US">Research and Development Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ResearchAndDevelopmentExpense_1" xml:lang="en-US">Research and development</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ResearchAndDevelopmentExpenseMember_0" xml:lang="en-US">Research and Development Expense [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ResearchAndDevelopmentExpenseMember_1" xml:lang="en-US">Research and development</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RestrictedCashNoncurrent_0" xml:lang="en-US">Restricted Cash, Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_RestrictedCashNoncurrent_1" xml:lang="en-US">Restricted cash</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_RestrictedCashNoncurrent_2" xml:lang="en-US">Restricted cash included in other assets, non-current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RetainedEarningsAccumulatedDeficit_0" xml:lang="en-US">Retained Earnings (Accumulated Deficit)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_RetainedEarningsAccumulatedDeficit_1" xml:lang="en-US">Accumulated deficit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RetainedEarningsMember_0" xml:lang="en-US">Retained Earnings [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_RetainedEarningsMember_1" xml:lang="en-US">Accumulated deficit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerAbstract_0" xml:lang="en-US">Revenue from Contract with Customer [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveLabel" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_0" xml:lang="en-US">Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_1" xml:lang="en-US">Revenue from Contract with Customer, Excluding Assessed Tax</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_2" xml:lang="en-US">Total revenue</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_3" xml:lang="en-US">Revenue from Contract with Customer, Excluding Assessed Tax, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_4" xml:lang="en-US">Revenues</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveLabel" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_0" xml:lang="en-US">Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_1" xml:lang="en-US">Revenue from Contract with Customer, Including Assessed Tax</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_2" xml:lang="en-US">Total revenue</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_3" xml:lang="en-US">Revenues</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerTextBlock_0" xml:lang="en-US">Revenue from Contract with Customer [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerTextBlock_1" xml:lang="en-US">REVENUES FROM CONTRACTS WITH CUSTOMERS</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RevenueFromRightsConcentrationRiskMember_0" xml:lang="en-US">Revenue from Rights Concentration Risk [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_RevenueFromRightsConcentrationRiskMember_1" xml:lang="en-US">Revenue concentration risk</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_RevenueRemainingPerformanceObligation_1" xml:lang="en-US">Aggregate amount of transaction price allocated to remaining performance obligations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RevenueRemainingPerformanceObligationPercentage_0" xml:lang="en-US">Revenue, Remaining Performance Obligation, Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_RevenueRemainingPerformanceObligationPercentage_1" xml:lang="en-US">Percentage of remaining performance obligations</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RevolvingCreditFacilityMember_0" xml:lang="en-US">Revolving Credit Facility [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_RevolvingCreditFacilityMember_1" xml:lang="en-US">Revolving Credit Facility</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_SaleOfStockNameOfTransactionDomain_0" xml:lang="en-US">Sale of Stock [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_SalesRevenueNetMember_0" xml:lang="en-US">Revenue Benchmark [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_SalesRevenueNetMember_1" xml:lang="en-US">Revenue benchmark</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_0" xml:lang="en-US">Schedule of Accrued Liabilities [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_1" xml:lang="en-US">Schedule of accrued expenses and other current liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_0" xml:lang="en-US">Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_1" xml:lang="en-US">Schedule of antidilutive securities excluded from computation of earnings per share</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_0" xml:lang="en-US">Schedule of Business Acquisitions, by Acquisition [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock_0" xml:lang="en-US">Share-based Payment Arrangement, Cost by Plan [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock_1" xml:lang="en-US">Schedule of share-based compensation expense by line item</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_0" xml:lang="en-US">Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_1" xml:lang="en-US">Schedule of the computation of basic and diluted net earnings (loss) per share</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_0" xml:lang="en-US">Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_0" xml:lang="en-US">Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_1" xml:lang="en-US">Schedule of share-based compensation expense by line item</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_0" xml:lang="en-US">Schedule of Revenue by Major Customers, by Reporting Segments [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_0" xml:lang="en-US">Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_1" xml:lang="en-US">Schedule of assets and liabilities measured at fair value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTextBlock_0" xml:lang="en-US">Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTextBlock_1" xml:lang="en-US">Schedule of identified intangible assets acquired</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_0" xml:lang="en-US">Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_1" xml:lang="en-US">Schedule of future amortization related to intangible assets other than goodwill</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_0" xml:lang="en-US">Schedule of Finite-Lived Intangible Assets [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock_0" xml:lang="en-US">Schedule of Finite-Lived Intangible Assets [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock_1" xml:lang="en-US">Schedule of carrying amounts and accumulated amortization expenses of intangible assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfFutureMinimumLeasePaymentsForCapitalLeasesTableTextBlock_0" xml:lang="en-US">Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ScheduleOfFutureMinimumLeasePaymentsForCapitalLeasesTableTextBlock_1" xml:lang="en-US">Schedule of future minimum lease payments under capital leases</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_0" xml:lang="en-US">Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_1" xml:lang="en-US">Schedule of future minimum annual payments under non-cancelable operating leases</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfGoodwillTable_0" xml:lang="en-US">Schedule of Goodwill [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfGoodwillTextBlock_0" xml:lang="en-US">Schedule of Goodwill [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ScheduleOfGoodwillTextBlock_1" xml:lang="en-US">Schedule of goodwill</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_0" xml:lang="en-US">Schedule of Maturities of Long-term Debt [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_1" xml:lang="en-US">Schedule of aggregate principal annual maturities of long-term loans</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfOtherAssetsNoncurrentTextBlock_0" xml:lang="en-US">Schedule of Other Assets, Noncurrent [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ScheduleOfOtherAssetsNoncurrentTextBlock_1" xml:lang="en-US">Schedule of other assets, noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_0" xml:lang="en-US">Property, Plant and Equipment [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock_0" xml:lang="en-US">Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock_1" xml:lang="en-US">Schedule of assets acquired and liabilities assumed</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_0" xml:lang="en-US">Schedule of Related Party Transactions, by Related Party [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock_0" xml:lang="en-US">Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock_1" xml:lang="en-US">Schedule of revenue by major customers by reporting segments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfRevenueFromExternalCustomersAttributedToForeignCountriesByGeographicAreaTextBlock_0" xml:lang="en-US">Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ScheduleOfRevenueFromExternalCustomersAttributedToForeignCountriesByGeographicAreaTextBlock_1" xml:lang="en-US">Schedule of disaggregated revenue by category</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock_0" xml:lang="en-US">Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock_1" xml:lang="en-US">Schedule of revenue by region based on the billing address of customers</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_0" xml:lang="en-US">Schedule of Revenues from External Customers and Long-Lived Assets [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0" xml:lang="en-US">Schedule of Segment Reporting Information, by Segment [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_0" xml:lang="en-US">Schedule of Segment Reporting Information, by Segment [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_1" xml:lang="en-US">Schedule of reportable operating segments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationActivityTableTextBlock_0" xml:lang="en-US">Share-based Payment Arrangement, Activity [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationActivityTableTextBlock_1" xml:lang="en-US">Schedule of stock option activity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfStockByClassTable_0" xml:lang="en-US">Schedule of Stock by Class [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfStockByClassTextBlock_0" xml:lang="en-US">Schedule of Stock by Class [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ScheduleOfStockByClassTextBlock_1" xml:lang="en-US">Schedule of composition of preferred stock capital</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_SegmentDomain_0" xml:lang="en-US">Segments [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_SegmentReportingAbstract_0" xml:lang="en-US">Segment Reporting [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_SegmentReportingDisclosureTextBlock_0" xml:lang="en-US">Segment Reporting Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_SegmentReportingDisclosureTextBlock_1" xml:lang="en-US">REPORTABLE SEGMENTS</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_SegmentReportingInformationLineItems_0" xml:lang="en-US">Segment Reporting Information [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_SellingAndMarketingExpense_0" xml:lang="en-US">Selling and Marketing Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_SellingAndMarketingExpense_1" xml:lang="en-US">Sales and marketing</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_SellingAndMarketingExpenseMember_0" xml:lang="en-US">Selling and Marketing Expense [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_SellingAndMarketingExpenseMember_1" xml:lang="en-US">Sales and marketing</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ShareBasedCompensation_0" xml:lang="en-US">Share-based Payment Arrangement, Noncash Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ShareBasedCompensation_1" xml:lang="en-US">Stock-based compensation expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_0" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_1" xml:lang="en-US">Vesting period of options</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDescription_0" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Description</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDescription_1" xml:lang="en-US">Description of terms of share-based payment arrangement</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_0" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_1" xml:lang="en-US">Term of options</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_0" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_1" xml:lang="en-US">Additional common shares reserved for issuance of stock options</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_0" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_1" xml:lang="en-US">Common shares reserved for issuance of stock options</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_0" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_1" xml:lang="en-US">Common stock shares available for grant</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_1" xml:lang="en-US">Outstanding as of December 31, 2020</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_0" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_1" xml:lang="en-US">Weighted Average exercise price</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_1" xml:lang="en-US">Forfeited</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_1" xml:lang="en-US">Granted three officers performance-based options exercise price</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment_3" xml:lang="en-US">Redemption of redeemable convertible preferred stock, upon initial public offering</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="lab_us-gaap_TemporaryEquityCarryingAmountAttributableToParent_0" xml:lang="en-US">Balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="lab_us-gaap_TemporaryEquityCarryingAmountAttributableToParent_1" xml:lang="en-US">Balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_TemporaryEquityCarryingAmountAttributableToParent_2" xml:lang="en-US">Temporary Equity, Carrying Amount, Attributable to Parent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_TemporaryEquityCarryingAmountAttributableToParent_3" xml:lang="en-US">Total mezzanine equity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_TemporaryEquityLiquidationPreference_0" xml:lang="en-US">Temporary Equity, Liquidation Preference</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_TemporaryEquityLiquidationPreference_1" xml:lang="en-US">Convertible preferred stock, $ 0.0001 par value per share, 1,043,778 shares authorized, issued and outstanding as of June 30, 2021 and December 31, 2020; aggregate liquidation preference of $ 1,921 as of June 30, 2021;</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_TemporaryEquityLiquidationPreference_2" xml:lang="en-US">Aggregate liquidation preference</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_TemporaryEquityParOrStatedValuePerShare_0" xml:lang="en-US">Temporary Equity, Par or Stated Value Per Share</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_TemporaryEquityParOrStatedValuePerShare_1" xml:lang="en-US">Mezzanine equity, par value per share</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_TemporaryEquitySharesAuthorized_0" xml:lang="en-US">Temporary Equity, Shares Authorized</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_TemporaryEquitySharesAuthorized_1" xml:lang="en-US">Mezzanine equity, shares authorized</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_TemporaryEquitySharesAuthorized_2" xml:lang="en-US">Number of shares authorized</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_TemporaryEquitySharesIssued_0" xml:lang="en-US">Temporary Equity, Shares Issued</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_TemporaryEquitySharesIssued_1" xml:lang="en-US">Mezzanine equity, shares issued</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="lab_us-gaap_TemporaryEquitySharesOutstanding_0" xml:lang="en-US">Balance (in Shares)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="lab_us-gaap_TemporaryEquitySharesOutstanding_1" xml:lang="en-US">Balance (in Shares)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_TemporaryEquitySharesOutstanding_2" xml:lang="en-US">Temporary Equity, Shares Outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_TemporaryEquitySharesOutstanding_3" xml:lang="en-US">Treasury stock, Shares Outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_TemporaryEquitySharesOutstanding_4" xml:lang="en-US">Mezzanine equity, shares outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_TemporaryEquityStockIssuedDuringPeriodValueNewIssues_0" xml:lang="en-US">Reclassification of warrant to common stocks to mezzanine equity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_TemporaryEquityStockIssuedDuringPeriodValueNewIssues_1" xml:lang="en-US">Temporary Equity, Stock Issued During Period, Value, New Issues</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_TemporaryEquityStockIssuedDuringPeriodValueNewIssues_2" xml:lang="en-US">Reclassification of warrant to common stocks to mezzanine equity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_TemporaryEquityStockIssuedDuringPeriodValueNewIssues_3" xml:lang="en-US">Issuance of preferred stock upon exercise of warrants</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_TemporaryEquityTableTextBlock_0" xml:lang="en-US">Temporary Equity [Table Text Block]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_TrademarksMember_0" xml:lang="en-US">Trademarks [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_TreasuryStockMember_1" xml:lang="en-US">Treasury stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="lab_us-gaap_TreasuryStockShares_0" xml:lang="en-US">Treasury Stock, Shares, Ending Balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="lab_us-gaap_TreasuryStockShares_1" xml:lang="en-US">Treasury Stock, Shares, Beginning Balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_TreasuryStockShares_2" xml:lang="en-US">Treasury Stock, Shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_TreasuryStockShares_3" xml:lang="en-US">Treasury stock, Shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_TreasuryStockShares_4" xml:lang="en-US">Treasury Stock, Shares, Total</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="lab_us-gaap_WarrantsAndRightsOutstanding_0" xml:lang="en-US">Balance at the end of the period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="lab_us-gaap_WarrantsAndRightsOutstanding_1" xml:lang="en-US">Balance at January 1</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_WarrantsAndRightsOutstanding_2" xml:lang="en-US">Warrants and Rights Outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_WarrantsAndRightsOutstanding_3" xml:lang="en-US">Warrants to purchase preferred and common stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_WarrantsAndRightsOutstandingMeasurementInput_0" xml:lang="en-US">Warrants and Rights Outstanding, Measurement Input</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_WarrantsAndRightsOutstandingMeasurementInput_1" xml:lang="en-US">Estimating the warrants' fair value using assumptions</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_1" xml:lang="en-US">Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_0" xml:lang="en-US">Weighted Average Number of Shares Outstanding, Diluted</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_1" xml:lang="en-US">Weighted average number of shares used in computing diluted net loss per share attributable to common stockholders (in shares)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_2" xml:lang="en-US">Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_3" xml:lang="en-US">Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_0" xml:lang="en-US">Weighted Average Number of Shares Outstanding, Basic and Diluted</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_1" xml:lang="en-US">Weighted average number of shares used in computing basic and diluted net loss per share attributable to common stockholders (in shares)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_2" xml:lang="en-US">Weighted Average Number of Shares Outstanding, Diluted, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_3" xml:lang="en-US">Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted</label>
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