BAND


Line plots across dimensions of each concept
Line plots across concepts
Tables

Table of contents



us-gaap:CommonStockValue
us-gaap:StatementClassOfStock

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareBasicAndDiluted

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare

us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:IncomeStatementLocation

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:CostOfGoodsAndServicesSold
us-gaap:ChangeInAccountingEstimateByType
us-gaap:StatementBusinessSegments

us-gaap:CostOfRevenue

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GrossProfit
us-gaap:StatementBusinessSegments

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaidNet

us-gaap:InterestExpenseDebt
us-gaap:DebtInstrument

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:OperatingExpenses

us-gaap:OperatingIncomeLoss

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:ResearchAndDevelopmentExpense

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ChangeInAccountingEstimateByType
us-gaap:ProductOrService
us-gaap:ProductOrService, us-gaap:StatementGeographical
us-gaap:StatementBusinessSegments

us-gaap:Revenues

us-gaap:SellingAndMarketingExpense

us-gaap:Assets
us-gaap:StatementGeographical

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:AccountsReceivableNetCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AmortizationOfIntangibleAssets
us-gaap:IncomeStatementLocation

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:Goodwill
us-gaap:BusinessAcquisition

us-gaap:IntangibleAssetsNetExcludingGoodwill
us-gaap:BusinessAcquisition

us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:BusinessAcquisition, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:AccruedLiabilitiesCurrent

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:LiabilitiesCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:LongTermDebt
us-gaap:DebtInstrument

us-gaap:LongTermDebtNoncurrent

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue
us-gaap:StatementClassOfStock

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:AmortizationOfFinancingCosts
us-gaap:DebtInstrument

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:EffectiveIncomeTaxRateContinuingOperations
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance

band:AccountsReceivableAllowanceForCreditLossForeignCurrencyTranslation

band:AdjustmentsToAdditionalPaidInCapitalCappedCallOptionPurchaseCost
us-gaap:StatementEquityComponents

band:AdjustmentsToAdditionalPaidInCapitalConvertibleDebtIssuanceCost
us-gaap:StatementEquityComponents
us-gaap:CounterpartyName, us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
band:AreaOfLandSold

band:CappedCallOptionIssuanceCost

band:DebtInstrumentConvertibleBeneficialConversionFeatureNet
us-gaap:DebtInstrument
us-gaap:StatementClassOfStock
band:DebtInstrumentConvertibleConversionCappedCallShares

band:DebtIssuanceCostsIncurredButNotYetPaid

band:DepreciationAndAmortizationNetOfAmortizationOfDebtIssuanceCosts

band:DepreciationandAmortizationNetofAmortizationofDebtIssuanceCosts

band:EquityAwardsWithheldForTaxLiabilitiesAccruedButNotPaid
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
band:EstimatedCostOfConstruction

band:IncreaseDecreaseInOperatingLeaseLiability
us-gaap:BusinessAcquisition
band:PaymentsForCashConsideration
us-gaap:BusinessAcquisition
band:WorldGrossDomesticProductOperationsPercent

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature
us-gaap:StatementEquityComponents

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:AmortizationOfDebtDiscountPremium
us-gaap:DebtInstrument

us-gaap:AmortizationOfFinancingCostsAndDiscounts
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationConsiderationTransferred1
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType
us-gaap:BusinessAcquisition, us-gaap:EquityInterestIssuedOrIssuableByType
us-gaap:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:CapitalizedComputerSoftwareAdditions

us-gaap:CapitalizedComputerSoftwareAmortization1
us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark
us-gaap:ConcentrationRiskPercentage1

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:DebtInstrumentConvertibleBeneficialConversionFeature
us-gaap:DebtInstrument
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanInterestCost
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanServiceCost

us-gaap:DefinedContributionPlanEmployerDiscretionaryContributionAmount

us-gaap:Depreciation
us-gaap:IncomeStatementLocation

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:FinanceLeaseInterestExpense

us-gaap:FinanceLeaseInterestPaymentOnLiability

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeaseRightOfUseAssetAmortization

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

us-gaap:IncomeLossAttributableToParent

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInDeferredCharges

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:InterestExpenseDebtExcludingAmortization
us-gaap:DebtInstrument

us-gaap:LeaseCost

us-gaap:NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeaseRightOfUseAssetAmortizationExpense

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax

us-gaap:PaymentsForHedgeFinancingActivities

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation
us-gaap:BusinessAcquisition
us-gaap:PaymentsToAcquireBusinessesGross
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:PaymentsToAcquireLandHeldForUse

us-gaap:PaymentsToDevelopSoftware
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:ProceedsFromCollectionOfAdvanceToAffiliate

us-gaap:ProceedsFromConvertibleDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNet

us-gaap:ProceedsFromSaleAndMaturityOfOtherInvestments
us-gaap:CounterpartyName, us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:ProceedsFromSaleOfLandHeldForUse

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProvisionForDoubtfulAccounts
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RevenueFromRelatedParties
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1

us-gaap:ShortTermLeaseCost

us-gaap:StockIssuedDuringPeriodValueAcquisitions
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:ConversionOfStockByUniqueDescription
us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecurities
us-gaap:ConversionOfStockByUniqueDescription, us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised
us-gaap:StatementEquityComponents

us-gaap:SubleaseIncome

band:ContractWithCustomerLiabilityRevenueExpectedToBeRecognizedInTheNextTwelveMonths
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
band:DebtInstrumentConvertibleInitialCapPrice
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
band:DebtInstrumentConvertibleInitialConversionStrikePrice
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
band:DebtInstrumentInterestRateAnnualEffectivePercentage

band:DebtIssuanceCostsConvertibleDebtEquityComponent
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
band:DebtIssuanceCostsConvertibleDebtLiabilityComponent

band:DeferredTaxAssetsOperatingLeaseArrangements

band:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfSalaryIncrease
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
band:DefinedBenefitPlanExpectedFutureBenefitPayments

band:FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour

band:LandUseParkingLiability

band:LeaseLiability

band:LeaseRightOfUseAsset

band:LesseeLeaseRestorationObligation

band:LesseeOperatingLeaseLiabilityToBePaidAfterYearFour

band:OperatingLeaseRightOfUseAssetAccumulatedAmortization
us-gaap:RelatedPartyTransactionsByRelatedParty
band:SubleaseAreaOfRealEstateProperty
us-gaap:StatementClassOfStock
dei:EntityCommonStockSharesOutstanding

us-gaap:AccountsReceivableGrossCurrent
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:AccountsReceivableRelatedPartiesCurrent

us-gaap:AccruedLiabilitiesAndOtherLiabilities

us-gaap:AccruedLiabilitiesCurrentAndNoncurrent

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:AreaOfLand

us-gaap:AreaOfRealEstateProperty
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationAcquiredReceivablesEstimatedUncollectible
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationAcquiredReceivablesGrossContractualAmount
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
us-gaap:BusinessAcquisition, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentAssets
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet

us-gaap:CapitalizedComputerSoftwareGross
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:CashAndCashEquivalentsFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:ContractWithCustomerAssetNet

us-gaap:ContractWithCustomerLiability

us-gaap:ContractWithCustomerLiabilityNoncurrent

us-gaap:ContractWithCustomerRefundLiability
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentConvertibleConversionPrice1
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentInterestRateEffectivePercentage

us-gaap:DebtInstrumentUnamortizedDiscount
us-gaap:DebtInstrument

us-gaap:DebtIssuanceCostsLineOfCreditArrangementsNet
us-gaap:BalanceSheetLocation

us-gaap:DeferredCosts

us-gaap:DeferredCostsCurrent

us-gaap:DeferredFinanceCostsNet
us-gaap:DebtInstrument

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsDeferredIncome

us-gaap:DeferredTaxAssetsGoodwillAndIntangibleAssets

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts

us-gaap:DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesLeasingArrangements

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanBenefitObligation
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear
us-gaap:RelatedPartyTransaction, us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanFairValueOfPlanAssets
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanFundedStatusOfPlan
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsAccumulatedBenefitObligation
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets
us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:DueToRelatedPartiesCurrentAndNoncurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:EscrowDeposit

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseRightOfUseAssetAccumulatedAmortization

us-gaap:FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisition, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
us-gaap:BusinessAcquisition, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:HostingArrangementServiceContractImplementationCostCapitalizedBeforeAccumulatedAmortization
us-gaap:AdjustmentsForNewAccountingPronouncements
us-gaap:BalanceSheetLocation

us-gaap:IntangibleAssetsGrossExcludingGoodwill
us-gaap:BusinessAcquisition
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:InvestmentsFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:LeaseIncentivePayableCurrentAndNoncurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LessorOperatingLeasePaymentsToBeReceived

us-gaap:LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths

us-gaap:LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongTermDebtFairValue

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:StatementScenario
us-gaap:OperatingLeasesFutureMinimumPaymentsDue
us-gaap:IncomeTaxAuthority
us-gaap:OperatingLossCarryforwards

us-gaap:OtherCommitmentDueInNextTwelveMonths

us-gaap:OtherCommitmentDueInSecondYear

us-gaap:OtherInvestments

us-gaap:OtherReceivablesNetCurrent
us-gaap:BalanceSheetLocation, us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:RestrictedCashAndCashEquivalents

us-gaap:RevenueRemainingPerformanceObligation

us-gaap:SalesAndExciseTaxPayableCurrent
us-gaap:CounterpartyName, us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:SecurityDeposit
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice

us-gaap:TaxCreditCarryforwardAmount

us-gaap:UnbilledReceivablesCurrent

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount

Plots across concepts


IncomeStatement
Net Income Loss
Expenses
Other Nonoperating Income Expense
Balance Sheet
Operating Lease Right Of Use Asset
Assets
Operating Lease Right Of Use Asset
Current Assets
Prepaid Expense And Other Assets Current
NonCurrent Assets
Other Assets Noncurrent
PropertyPlantAndEquipmentNet
Property Plant And Equipment Net
Liabilities
Operating Lease Liability
Current Liabilities
Other Accrued Liabilities Current
Noncurrent Liabilities
Other Liabilities Noncurrent
Stockholders Equity
Retained Earnings Accumulated Deficit
CashFlow
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInOperatingActivities
Net Income Loss
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
Shares
Weighted Average Number Of Diluted Shares Outstanding
OperatingLeaseLiability
Operating Lease Liability Current
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Due Year Four
FiniteLivedIntangibleAssets
Finite Lived Intangible Assets Accumulated Amortization
AccountsReceivable
Allowance For Doubtful Accounts Receivable Current

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
us-gaap:CommonStockValue ▅▅▅▅▅▄▅▄▄▄▂▂▂▂▁█0.0250.0250.0240.0240.0240.0230.0240.0230.0230.0230.0190.0190.0190.0180.0170.03NANA0.03NA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁25.09602625.015948NA24.17576223.97366323.563569NA23.42645524.44741721.975944NA21.14612420.89365320.484753NA33.131842532.22333532.4315225NA32.0259475
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁25.09602625.015948NA24.17576223.97366323.563569NA23.42645523.10255320.498104NA19.07219618.15496417.658611NA29.571642529.5364629.4964125NA29.0004725
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount NA2.414442NANANA1.314975NA0.0NANANA0.0NANANANANANANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities us-gaap:ConvertibleDebtSecurities▁█1.2064931.812134NA1.692546NANANANANANANANANANANANANANANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities us-gaap:EmployeeStockOption▁█0.1919710.196433NA0.2691080.3139560.820966NA0.8646050.00.0NA0.00.00.094126NA0.1101250.7475810.588365NA0.569947
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities us-gaap:RestrictedStockUnitsRSU▁█0.3808080.405875NA0.4474490.4687970.494009NA0.411422NANANANANANANANANANANANA
us-gaap:EarningsPerShareBasic -0.28NA-0.8200000000000001-0.1-0.86-0.04-0.09000000000000001-0.040.150.1-0.090000000000000080.130.580.350.227999999999999980.048NANA0.428000000000000050.1
us-gaap:EarningsPerShareDiluted -0.28NA-0.8200000000000001-0.1-0.86-0.04-0.09-0.040.140.09-0.060000000000000050.120.50.30.201999999999999990.044000000000000004NANA0.392000000000000070.08800000000000001
us-gaap:EarningsPerShareBasicAndDiluted NA-0.21NANANA-0.04NANANANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsPerBasicShare ▃▃▁▄▁▄▄▄▅▅▄▅▆▅▄▅▅▅█▅-2.8e-07-2.1e-07-8.200000000000001e-07-1.0000000000000001e-07-8.6e-07-4e-08-9.000000000000001e-08-4e-081.5e-071.0000000000000001e-07-9.000000000000008e-081.3e-075.8e-073.5e-07-6e-081.2e-071.4e-072.2e-071.0299999999999999e-063e-07
us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare ▃▄▁▄▁▄▄▄▅▅▄▅▆▆▄▅▅▅█▅-2.8e-07-2.1e-07-8.200000000000001e-07-1.0000000000000001e-07-8.6e-07-4e-08-9e-08-4e-081.4e-079e-08-6.000000000000005e-081.2e-075e-073e-07-4.999999999999999e-081.1e-071.3e-072.0000000000000002e-079.399999999999999e-072.7e-07
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
 COGS Ratio us-gaap:ChangeInAccountingEstimateByType band:EstimatedPeriodOfBenefitForNonrefundableUpfrontFeesNANA-2.9110.4030.4370.439NANANANANANANANANANANANANANA
 COGS Ratio us-gaap:StatementBusinessSegments band:CPaaS█▇▇▅▄▃▃▂▂▂▂▁▁▁105.039100.14698.13173.76267.07659.12153.44351.49947.98945.01344.14841.53739.83338.897NANANANANANA
 COGS Ratio us-gaap:StatementBusinessSegments us-gaap:AllOtherSegments█▆▇▄▂▂▁▂▂▁▁▂▁▇15.61913.33314.91610.9969.7149.3978.568.9928.798.3088.1958.9178.47114.115NANANANANANA
 Gross Margin us-gaap:StatementBusinessSegments band:CPaaS██▇▅▄▄▃▃▃▂▂▂▂▂▁▁▁▁▁▁105.039100.14698.13173.76267.07659.12153.44351.49947.98945.01344.14841.53739.83338.89734.98133.39731.54731.64730.17830.249
 Gross Margin us-gaap:StatementBusinessSegments us-gaap:AllOtherSegments█▆▇▄▃▃▂▂▂▂▂▂▂▇▁▁▁▁▂▂15.61913.33314.91610.9969.7149.3978.568.9928.798.3088.1958.9178.47114.1157.4857.9417.9797.9788.5848.354
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
 TTM Greenblatt ROC _ _▅▅▁▆▅▄▄▄▄▃▄▅▅█▆▆▆0.934-0.037-12.2171.864-0.268-2.884-3.461-4.605-3.783-5.844-3.270.0871.1598.7762.2113.0714.153NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
us-gaap:AllocatedShareBasedCompensationExpense ▆█▅▅▅▅▃▃▃▃▃▂▂▁▂▂▁▁▁▁3.3774.392.5752.3822.4252.4991.6661.6541.631.6761.3220.7620.7620.4930.7010.6120.2440.2460.2710.245
us-gaap:ComprehensiveIncomeNetOfTax ▅▁▇▅▂▅▅▅▆▆▅▆▇▇▆▆▆▆█▆-0.913-28.5017.954-2.213-20.664-1.154-1.88-1.0813.4972.0-1.2882.50910.5166.185-0.5991.6341.9472.98914.5083.288
us-gaap:CostOfGoodsAndServicesSold █▇▇▅▄▃▃▃▂▂▂▂▂▂▁▁▁▁▁▁66.05961.32861.35745.52742.00936.35932.97933.10430.1128.76628.74127.47426.56625.36422.83122.57122.29421.56621.04121.514
us-gaap:CostOfRevenue █▇▇▅▄▃▃▃▂▂▂▂▂▂▁▁▁▁▁▁66.05961.32861.35745.52742.00936.35932.97933.10430.1128.76628.74127.47426.56625.36422.83122.57122.29421.56621.04121.514
us-gaap:GeneralAndAdministrativeExpense ▆▅█▃▃▃▃▃▃▃▂▂▂▂▂▂▁▁▂▁28.26426.86337.68518.13416.8416.09614.96315.26914.28214.33313.95311.57611.4910.56911.3789.7978.2577.63710.2887.899
us-gaap:GrossProfit ██▇▅▄▄▃▃▃▂▂▂▂▃▁▁▁▁▁▁54.59952.15151.6939.23134.78132.15929.02427.38726.66924.55523.60222.9821.73827.64819.63518.76717.23218.05917.72117.089
us-gaap:IncomeTaxExpenseBenefit ▄▄▄▄█▃▄▃▂▂▃▃▂▅▅▄▄▄▁▄0.272-0.3321.2220.0116.505-2.732-0.747-2.81-6.526-7.635-1.921-2.32-9.2632.6343.0320.8991.2151.772-11.50.137
us-gaap:IncomeTaxesPaidNet █▁▇▄▄▂▄▁▄▄▄▄▄▄▅▅▇▃0.694-0.3940.6060.0020.075-0.2290.0-0.3350.0430.1140.00.00.0650.090.1640.2070.517-0.033NANA
us-gaap:InterestExpenseDebt ▆▄█▁▄▂7.6215.46911.5850.034.7911.831NA4.821NANANANANANANANANANANANA
us-gaap:InterestPaidNet ▁█▁█▁▁▁▄▂▁▁▁▁▁▄0.0160.5250.0230.5240.0320.00.0370.2080.0630.0330.0330.0290.0260.0190.189NANANANANA
us-gaap:NetIncomeLoss ▄▄▁▅▁▅▅▅▆▆▅▆▇▆▅▅▅▆█▆-6.928-5.316-19.926-2.352-20.641-1.058-1.956-1.0143.4721.992-1.292.5110.5126.191-0.5991.6341.9472.98914.5083.288
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▄▄▁▅▁▅▅▅▆▆▅▆█▇-6.928-5.316-19.926-2.352-20.641-1.058-1.956-1.0143.4721.992-1.292.5110.5126.191NANANANANANA
us-gaap:OperatingExpenses ▇▆█▄▄▄▄▄▃▃▃▂▂▂▂▁▁▁▁▁53.66552.18863.90737.36735.04935.04332.48531.99230.45230.39926.87222.89320.57918.87217.42415.69613.07912.87715.06912.707
us-gaap:OperatingIncomeLoss ▅▅▁▆▅▄▄▄▄▃▄▅▅█▆▆▆▇▆▇0.934-0.037-12.2171.864-0.268-2.884-3.461-4.605-3.783-5.844-3.270.0871.1598.7762.2113.0714.1535.1822.6524.382
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax ▅▁█▄▄▄▄▄▄6.015-23.18527.880.139-0.023-0.0960.075-0.0460.012NANANANANANANANANANANA
us-gaap:OtherNonoperatingIncomeExpense ▁▃▂▄▄▇████▇▇▇▇█▇▇▇▇▇-7.59-5.611-6.487-4.206-3.868-0.9060.7580.7810.7290.2010.0590.1030.090.0490.222-0.538-0.991-0.421-0.311-0.229
us-gaap:ResearchAndDevelopmentExpense ███▆▆▆▅▅▄▄▄▃▂▂▁▁▁▁▁▁12.81713.33312.74310.2329.5549.538.1497.9397.6567.7176.7865.8954.4353.7812.9272.7712.4092.6822.3632.39
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax █▇▇▅▄▄▃▃▃▂▂▂▂▂▁▁▁▁▁▁120.658113.479113.04784.75876.7968.51862.00360.49156.77953.32152.34350.45448.30453.01242.46641.33839.52639.62538.76238.603
us-gaap:Revenues █▇▇▅▄▄▃▃▃▂▂▂▂▂▁▁▁▁▁▁120.658113.479113.04784.75876.7968.51862.00360.49156.77953.32152.34350.45448.30453.01242.46641.33839.52639.62538.76238.603
us-gaap:SellingAndMarketingExpense ▇▇█▅▅▅▅▅▅▅▃▃▂▂▁▁▁▁▁▁12.58411.99213.4799.0018.6559.4179.3738.7848.5148.3496.1335.4224.6544.5223.1193.1282.4132.5582.4182.418
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
us-gaap:Assets ██▇▅▅▅▃▃▃▃▂▂▁▁▁▁1094.431070.349890.608670.432657.957665.276341.416320.954313.495303.655150.42149.093136.553115.764104.49472.55NANA69.973NA
us-gaap:Liabilities ██▆▅▅▄▁▁▁▁▁▁▁▁▁▁649.417627.611460.685357.293345.023337.11771.32650.56844.3741.7841.6540.85735.16732.58927.78365.231NANA70.529NA
us-gaap:LiabilitiesAndStockholdersEquity ██▇▅▅▅▃▃▃▃▂▂▁▁▁▁1094.431070.349890.608670.432657.957665.276341.416320.954313.495303.655150.42149.093136.553115.764104.49472.55NANA69.973NA
us-gaap:StockholdersEquity ███▆▆▆▅▅▅▅▃▃▃▂▂▁445.013442.738429.923313.139312.934328.159270.09270.386269.125261.875108.77108.236101.38683.17576.711-14.499NANA-22.374NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
us-gaap:AssetsCurrent ▆▆▃███▃▄▄▄▂▂▂▂▁▁408.229406.674193.599590.815577.331566.873226.949233.312233.219235.60491.41495.12987.19478.62265.25230.225NANA28.042NA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▅▆▂▅▅█▄▄▃▃▂▂▂▁▁▁▁309.615319.73172.163300.179290.979491.982184.414192.41140.091138.87141.26148.57445.80638.77337.6275.3665.679NA6.7885.819
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▅▅▂▅▅█▃▄▃▃▁▂▂▁▁▁▁▁▁319.021329.25881.437301.323291.909517.86185.004192.801140.583139.09541.50148.80746.00438.97337.875.5925.9025.747.028NA
us-gaap:AccountsReceivableNetCurrent █▆▇▅▅▄▃▃▂▂▂▂▂▂▁▁63.09851.45855.24346.45241.77937.07230.18730.0326.69527.89824.00923.7823.00124.40421.22518.702NANA16.838NA
us-gaap:PrepaidExpenseAndOtherAssetsCurrent █▄▅▃▄▃▃▃▃▂▂▂▂▂▁▂23.3613.38614.50810.02210.87110.1499.268.358.5416.9716.1147.8397.3956.9533.7676.157NANA4.416NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
us-gaap:PropertyPlantAndEquipmentGross NANANA88.36785.04981.97476.56775.57769.1261.91658.83853.90950.21446.34844.37340.681NANA36.077NA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType band:ComputerandOfficeEquipmentNANANA4.7834.7644.7254.6278.0737.9467.8277.6627.3427.0287.457.5457.525NANA7.539NA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType band:TelecommunicationsEquipmentNANANA52.8750.43148.4644.32438.69935.86531.1730.69424.18122.75821.4919.98516.815NANA13.718NA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:FurnitureAndFixturesNANANA2.3892.3882.3872.3732.5092.0861.7931.7411.3380.8720.8720.8630.68NANA0.68NA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LeaseholdImprovementsNANANA5.8465.8465.8535.2634.6323.4672.3882.4381.9172.3740.4530.4530.453NANA0.453NA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:SoftwareAndSoftwareDevelopmentCostsNANANA2.9612.4272.0272.018NANANA1.805NANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:SoftwareDevelopmentNANANA19.50819.18318.51217.95221.65419.74618.72816.29319.12117.17216.07315.51715.198NANA13.677NA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment NANANA44.44141.27938.06934.91339.49237.32135.55333.70232.13930.88330.44629.42728.292NANA24.896NA
us-gaap:AmortizationOfIntangibleAssets ██▆▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁4.8644.8673.2760.130.130.130.130.130.130.130.130.130.130.1650.210.210.210.210.2220.222
us-gaap:PropertyPlantAndEquipmentNet NANANA43.92643.7743.90541.65436.08531.79926.36325.13621.7719.33115.90214.94612.389NANA11.181NA
us-gaap:Goodwill ███▁▁▁▁▁▁▁▁▁▁▁▁▁360.551356.379372.2396.8676.8676.8676.8676.8676.8676.8676.8676.8676.8676.8676.8676.867NANA6.867NA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▇██▁▁▁▁▁▁▁▁▁▁▁▁▁230.711232.804248.0556.1796.3096.4396.5696.6996.8296.9597.0897.2197.3487.4787.6437.853NANA8.482NA
us-gaap:FiniteLivedIntangibleAssetsNet ▇██▁▁▁▁▁▁▁▁▁▁▁▁▁229.947232.04247.2915.4155.5455.6755.8055.9356.0656.1956.3256.4556.5846.7146.8797.089NANANANA
us-gaap:OperatingLeaseRightOfUseAsset ▁▃▅▂▄▆█16.89418.00819.49117.50918.69919.87321.031NANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent █▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁7.3732.0291.9751.7241.9391.6261.5331.252.1281.4090.7270.7690.7981.0471.1921.069NANA1.011NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
us-gaap:AccountsPayableCurrent ▆▆█▅▃▄▃▂▂▂▂▃▁▂▂▂8.2059.3611.6657.7764.4745.3254.193.3433.0893.3693.4184.2941.7863.1543.0252.518NANA4.688NA
us-gaap:AccruedLiabilitiesCurrent █▇█▄▃▂▃▃▂▂▂▂▂▁▁▁66.55355.88463.06534.3629.40523.78127.32828.00224.1221.76821.39320.29418.53114.47115.63315.783NANA14.649NA
us-gaap:ContractWithCustomerLiabilityCurrent ▅▅▅▂▂▁▂▁▁▂█6.5916.5196.5155.5275.2365.0465.1775.024.8875.4217.912NANANA5.768NANANANANA
us-gaap:LiabilitiesCurrent █▇█▄▃▃▃▃▂▂▂▂▁▁▁▁92.34781.59992.18957.84148.70543.97645.73841.08534.77232.76132.72331.6425.92424.77224.51825.86NANA30.469NA
us-gaap:OperatingLeaseLiabilityCurrent █▅▅▃▂▂▁6.05.5945.5155.1625.0674.9734.876NANANANANANANANANANANANANA
us-gaap:OtherAccruedLiabilitiesCurrent ▆██▁▁▄▃▃▃▃▂▃▃▂▂▂1.8392.5882.6570.2370.4051.1470.9040.8390.8580.7940.7380.9460.930.6380.5150.483NANA0.654NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
us-gaap:LongTermDebt ██▁▁▁▁471.987464.848282.196277.483272.901268.383NANANANANANANANANANANANANANA
us-gaap:LongTermDebtNoncurrent ██▅▅▅▅▁471.987464.848282.196277.483272.901268.3830.0NANANANANANANANANANANANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet ▅▁█59.29457.32861.005NANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent █▁▁4.871.6351.707NANANANANANANANA2.6052.3920.7040.7161.431NANA0.611NA
us-gaap:OperatingLeaseLiabilityNoncurrent ▁▃▅▃▅▆█14.04815.60917.20215.63817.06518.48619.868NANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo ▆▅█▁6.6016.5936.7556.302NANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree ▁▁█▇2.6792.676.6235.926NANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour ▁▁█▃1.6571.6482.7011.987NANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA1.6810.949NANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA0.751NANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
us-gaap:StockholdersEquity ███▆▆▆▅▅▅▅▃▃▃▂▂▁445.013442.738429.923313.139312.934328.159270.09270.386269.125261.875108.77108.236101.38683.17576.711-14.499NANA-22.374NA
us-gaap:CommonStockValue ▅▅▅▅▅▄▅▄▄▄▂▂▂▂▁█0.0250.0250.0240.0240.0240.0230.0240.0230.0230.0230.0190.0190.0190.0180.0170.03NANA0.03NA
us-gaap:AdditionalPaidInCapital ██▇▆▆▆▅▅▅▅▃▃▂▂▂▁495.966492.778451.463342.633340.215334.777275.553273.97271.628267.875116.6114.778110.437102.743102.46510.661NANA9.356NA
us-gaap:RetainedEarningsAccumulatedDeficit ▁▂▂▅▅█████▇█▇▆▅▅-61.749-54.821-49.505-29.579-27.227-6.586-5.528-3.572-2.558-6.03-7.848-6.558-9.068-19.58-25.771-25.172NANA-31.742NA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▄▂█▁▁▁▁▁▁▁▁▁▁▁▁10.7714.75627.9410.061-0.078-0.0550.041-0.0350.0320.007-0.001-0.003-0.002-0.0060.0NANANANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue ▆█▅▄▄▅▃▃▃▃▂▁▁▁3.3774.392.5752.3822.4252.4991.6661.6541.631.6761.3220.7620.7620.493NANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▄▇▂█▇▁▅▅▅▁▄▆▆█▆▆▆▄▄-1.16410.009-6.81311.6477.291-7.6072.2271.9323.623-9.0350.6326.8845.87411.2434.7774.845.975-0.9690.04NA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▇▂▇▁▇▇█▇▆▇▇▇▇▇▇▇▇▇-7.77822.116-212.923-2.334-235.4-4.428-9.92349.722-3.628-43.824-8.394-7.637-5.752-9.9-3.054-2.191-1.911-0.807-2.142NA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▅▁▁▁█▁▁▁▄▁▁▁▁▂▁-1.097215.294-0.2110.0452.141344.916-0.1110.5821.494150.4530.4563.5566.909-0.2430.557-2.961NANANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▄▇▁▄▁█▄▄▄▅▄▄▄▄▄▄▄▄-10.237247.821-219.8869.414-225.951332.856-7.79752.2181.48897.594-7.3062.8037.0311.10332.278-0.310.162-1.288NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
us-gaap:AmortizationOfFinancingCosts NANA10.3140.03NANA0.0180.020.0170.1220.0160.0160.0160.0160.280.0320.0320.0320.025NA
 us-gaap:AmortizationOfFinancingCosts us-gaap:DebtInstrument band:ZeroPointFiveZeroPercentConvertibleSeniorNotesDue2028█▁2.0040.333NANANANANANANANANANANANANANANANANANA
 us-gaap:AmortizationOfFinancingCosts us-gaap:DebtInstrument band:ZeroPointTwoFivePercentConvertibleSeniorNotesDue2026█▁4.5874.51NANA4.2621.629NANANANANANANANANANANANANANA
us-gaap:DeferredIncomeTaxExpenseBenefit ▄▄▄▄█▃▄▃▂▂▃▃▂▄▅▄▄▄▁1.308-1.0950.0120.016.591-2.337-0.411-2.828-6.599-7.664-1.792-2.364-9.2882.6112.7180.9940.8941.562-11.339NA
us-gaap:IncreaseDecreaseInAccountsPayable ▄▆▁█▄▅▆▄▅▄▅▆▂▃▄▅▃▂▃-0.2691.387-2.592.864-0.2630.3041.314-0.0740.34-0.4350.6091.597-1.719-0.656-0.2590.827-1.334-1.663-0.844NA
us-gaap:IncreaseDecreaseInAccountsReceivable █▁▄▅▅▆▃▄▂▄▃▃▂▄▄▃▃▃▃11.689-3.532.6144.6094.716.8990.8742.621-1.2063.8890.2290.779-1.4033.1792.5231.734-0.0360.1660.56NA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▄▇▂█▇▁▅▅▅▁▄▆▆█▆▆▆▄▄-1.16410.009-6.81311.6477.291-7.6072.2271.9323.623-9.0350.6326.8845.87411.2434.7774.845.975-0.9690.04NA
us-gaap:NetIncomeLoss ▄▄▁▅▁▅▅▅▆▆▅▆▇▆▅▅▅▆█▆-6.928-5.316-19.926-2.352-20.641-1.058-1.956-1.0143.4721.992-1.292.5110.5126.191-0.5991.6341.9472.98914.5083.288
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▄▄▁▅▁▅▅▅▆▆▅▆█▇-6.928-5.316-19.926-2.352-20.641-1.058-1.956-1.0143.4721.992-1.292.5110.5126.191NANANANANANA
us-gaap:ShareBasedCompensation ▆█▅▅▅▅▃▃▃▃▃▂▂▁▂▂▁▁▁3.3774.392.5752.3822.4252.4991.6661.6541.631.6761.3220.7620.7620.4930.7010.6120.2440.2460.271NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▇▂▇▁▇▇█▇▆▇▇▇▇▇▇▇▇▇-7.77822.116-212.923-2.334-235.4-4.428-9.92349.722-3.628-43.824-8.394-7.637-5.752-9.9-3.054-2.191-1.911-0.807-2.142NA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment NA6.7812.7371.9863.9123.6389.1275.2446.6051.2397.4981.8082.1520.9612.6981.20.9930.131.143NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▅▁▁▁█▁▁▁▄▁▁▁▁▂▁-1.097215.294-0.2110.0452.141344.916-0.1110.5821.494150.4530.4563.5566.909-0.2430.557-2.961NANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value25000.025000.024000.024000.024000.023000.024000.023000.023000.023000.019000.019000.019000.018000.017000.030000.030000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStockValue us-gaap:StatementClassOfStock

us-gaap:CommonClassA


Common
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value22000.019000.013000.04000.00
Percentage of CommonStockValue91.779.268.423.50.0
Percentage of Assets0.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassA0.00.00.00.00.0

us-gaap:CommonClassB


Common
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2000.05000.06000.013000.00
Percentage of CommonStockValue8.320.831.676.50.0
Percentage of Assets0.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassB0.00.00.00.00.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-30
Value252524232323242121202033323232
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-30
Value252524232323232019181729292929
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount


Antidilutive
Period End2021-03-312020-03-312019-09-302018-09-30
Value2414400.01315000.000
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.00.00.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:ConvertibleDebtSecurities


Antidilutive
Period End2021-06-302021-03-312020-09-30
Value1206500.01812100.01692500.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount0.075.10.0

us-gaap:EmployeeStockOption


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-30
Value191970.0196430.0269110.0313960.0820970.0864600.0000094126.0110120.0747580.0588360.0569950.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount0.08.10.00.062.40.00.00.00.00.00.00.00.00.00.0

us-gaap:RestrictedStockUnitsRSU


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-30
Value380810.0405880.0447450.0468800.0494010.0411420.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount0.016.80.00.037.60.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-30
Value-0.28-0.82-0.1-0.86-0.04-0.09-0.040.150.1-0.090.130.580.350.2280.0480.4280.1
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-30
Value-0.28-0.82-0.1-0.86-0.04-0.09-0.040.140.09-0.060.120.50.30.2020.0440.3920.088
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic And Diluted

us-gaap:EarningsPerShareBasicAndDiluted

us-gaap:EarningsPerShareBasicAndDiluted


Earnings
Period End2021-03-312020-03-31
Value-0.21-0.04
Percentage of EarningsPerShareBasicAndDiluted100.0100.0

Income Loss From Continuing Operations Per Basic Share

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-0.28-0.21-0.82-0.1-0.86-0.04-0.09-0.040.150.1-0.090.130.580.35-0.060.120.140.221.030.3
Percentage of IncomeLossFromContinuingOperationsPerBasicShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Income Loss From Continuing Operations Per Diluted Share

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-0.28-0.21-0.82-0.1-0.86-0.04-0.09-0.040.140.09-0.060.120.50.3-0.050.110.130.20.940.27
Percentage of IncomeLossFromContinuingOperationsPerDilutedShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-012017-09-302017-06-302017-03-312016-12-312016-09-30
Value3377000.04390000.02575000.02382000.02425000.02499000.01666000.01654000.01630000.01676000.01322000.0762000.0762000.0493000.0701000.0394000.0612000.0244000.0246000.0271000.0245000.0
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.83.90.02.83.23.60.02.72.93.10.01.51.60.90.00.01.50.60.60.00.6

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:IncomeStatementLocation

us-gaap:CostOfSales


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value66000.072000.047000.046000.0-60000.0175000.053000.052000.050000.056000.035000.030000.032000.018000.023000.017000.021000.020000.016000.017000.0
Percentage of AllocatedShareBasedCompensationExpense2.01.61.81.9-2.57.03.23.13.13.32.63.94.23.73.32.88.68.15.96.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.00.1-0.10.30.00.10.10.10.00.10.10.00.00.00.10.10.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CostOfSales0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:GeneralAndAdministrativeExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value2187000.02936000.01606000.01459000.01489000.01476000.0946000.0951000.0930000.0928000.0961000.0413000.0461000.0323000.0575000.0503000.0150000.0168000.0185000.0161000.0
Percentage of AllocatedShareBasedCompensationExpense64.866.962.461.361.459.156.857.557.155.472.754.260.565.582.082.261.568.368.365.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.82.60.01.71.92.20.01.61.61.70.00.81.00.60.01.20.40.40.00.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:GeneralAndAdministrativeExpense0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ResearchAndDevelopmentExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value666000.0768000.0537000.0508000.0620000.0453000.0360000.0371000.0358000.0372000.0179000.0173000.0129000.074000.055000.038000.030000.031000.030000.030000.0
Percentage of AllocatedShareBasedCompensationExpense19.717.520.921.325.618.121.622.422.022.213.522.716.915.07.86.212.312.611.112.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.60.70.00.60.80.70.00.60.60.70.00.30.30.10.00.10.10.10.00.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ResearchAndDevelopmentExpense0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:SellingAndMarketingExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value458000.0614000.0385000.0369000.0376000.0395000.0307000.0280000.0292000.0320000.0147000.0146000.0140000.078000.048000.054000.043000.027000.040000.037000.0
Percentage of AllocatedShareBasedCompensationExpense13.614.015.015.515.515.818.416.917.919.111.119.218.415.86.88.817.611.014.815.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.50.00.40.50.60.00.50.50.60.00.30.30.10.00.10.10.10.00.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:SellingAndMarketingExpense0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-0.913-28.5017.954-2.213-20.664-1.154-1.88-1.0813.4972.0-1.2882.509106.185-0.5991.6341.9472.989143.288
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.8-25.10.0-2.6-26.9-1.70.0-1.86.23.80.05.021.811.70.04.04.97.50.08.5

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostOfGoodsAndServicesSold


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value6661614542363233302828272625222222212121
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax54.754.00.053.754.753.10.054.753.053.90.054.555.047.80.054.656.454.40.055.7

us-gaap:CostOfGoodsAndServicesSold us-gaap:ChangeInAccountingEstimateByType

band:EstimatedPeriodOfBenefitForNonrefundableUpfrontFees


Cost
Period End2020-12-312020-09-302020-06-302020-03-31
Value-1.6040.1790.2470.319
Percentage of CostOfGoodsAndServicesSold-2.60.40.60.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.20.30.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax band:EstimatedPeriodOfBenefitForNonrefundableUpfrontFees0.044.456.572.7

us-gaap:CostOfGoodsAndServicesSold us-gaap:StatementBusinessSegments

band:CPaaS


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value5653523937312929262525232321
Percentage of CostOfGoodsAndServicesSold84.987.585.186.488.687.788.888.587.988.087.987.387.186.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax46.547.30.046.448.546.50.048.446.647.40.047.647.941.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax band:CPaaS53.453.60.053.355.553.90.056.955.256.20.057.858.156.3

us-gaap:AllOtherSegments


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value9.9657.6479.1186.1814.784.4673.7063.8073.6373.4663.4833.4783.4293.459
Percentage of CostOfGoodsAndServicesSold15.112.514.913.611.412.311.211.512.112.012.112.712.913.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.36.70.07.36.26.50.06.36.46.50.06.97.16.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AllOtherSegments63.857.40.056.249.247.50.042.341.441.70.039.040.524.5

Cost Of Revenue

us-gaap:CostOfRevenue

us-gaap:CostOfRevenue


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value6661614542363233302828272625222222212121
Percentage of CostOfRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax54.754.00.053.754.753.10.054.753.053.90.054.555.047.80.054.656.454.40.055.7

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value2826371816161415141413111110119.7978.2577.637107.899
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax23.423.70.021.421.923.50.025.225.226.90.022.923.819.90.023.720.919.30.020.5

Gross Profit

us-gaap:GrossProfit

us-gaap:GrossProfit


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value5452513934322927262423222127191817181717
Percentage of GrossProfit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax45.346.00.046.345.346.90.045.347.046.10.045.545.052.20.045.443.645.60.044.3

us-gaap:GrossProfit us-gaap:StatementBusinessSegments

band:CPaaS


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value4846453429272422211918171616151412131212
Percentage of GrossProfit89.689.188.887.785.884.783.381.180.780.380.076.376.861.579.075.473.374.370.770.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax40.640.90.040.638.939.70.036.737.937.00.034.834.632.10.034.231.933.90.031.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax band:CPaaS46.646.40.046.744.546.10.043.144.843.80.042.241.943.70.042.440.042.40.039.8

us-gaap:AllOtherSegments


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value5.6545.6865.7984.8154.9344.934.8545.1855.1534.8424.7125.4395.042104.1194.6174.6044.645.1855.037
Percentage of GrossProfit10.410.911.212.314.215.316.718.919.319.720.023.723.238.521.024.626.725.729.329.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.75.00.05.76.47.20.08.69.19.10.010.810.420.10.011.211.611.70.013.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AllOtherSegments36.242.60.043.850.852.50.057.758.658.30.061.059.575.50.058.157.758.20.060.3

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0.272-0.3321.2220.0116-2.732-0.747-2.81-6.526-7.635-1.921-2.32-9.2632.6343.0320.8991.2151.772-11.50.137
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.2-0.30.00.021.5-4.00.0-4.6-11.5-14.30.0-4.6-19.25.00.02.23.14.50.00.4

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value694000.0-394000.0606000.02000.075000.0-229000.00-335000.043000.0114000.00065000.090000.0164000.0207000.0517000.0-33000.0
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.6-0.30.00.00.1-0.30.0-0.60.10.20.00.00.10.20.00.51.3-0.1

Interest Expense Debt

us-gaap:InterestExpenseDebt

us-gaap:InterestExpenseDebt


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-30
Value7.6215.469110.034.7911.8314.821
Percentage of InterestExpenseDebt100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.34.80.00.06.22.78.0

us-gaap:InterestExpenseDebt us-gaap:DebtInstrument

band:ZeroPointFiveZeroPercentConvertibleSeniorNotesDue2028


Interest
Period End2021-06-302021-03-31
Value2.4830.413
Percentage of InterestExpenseDebt32.67.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.10.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax band:ZeroPointFiveZeroPercentConvertibleSeniorNotesDue20280.00.0

band:ZeroPointTwoFivePercentConvertibleSeniorNotesDue2026


Interest
Period End2021-06-302021-03-312020-06-302020-03-31
Value5.1385.0564.7911.831
Percentage of InterestExpenseDebt67.492.4100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.34.56.22.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax band:ZeroPointTwoFivePercentConvertibleSeniorNotesDue20260.00.00.00.0

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value16000.0525000.023000.0524000.032000.0037000.0208000.063000.033000.033000.029000.026000.019000.0189000.0
Percentage of InterestPaidNet100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.50.00.60.00.00.00.30.10.10.00.10.10.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-6.928-5.316-19.926-2.352-20.641-1.058-1.956-1.0143.4721.992-1.292.51106.191-0.5991.6341.9472.989143.288
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-5.7-4.70.0-2.8-26.9-1.50.0-1.76.13.70.05.021.811.70.04.04.97.50.08.5

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-6.928-5.316-19.926-2.352-20.641-1.058-1.956-1.0143.4721.992-1.292.51106.191
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-5.7-4.70.0-2.8-26.9-1.50.0-1.76.13.70.05.021.811.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Expenses

us-gaap:OperatingExpenses

us-gaap:OperatingExpenses


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value5352633735353231303026222018171513121512
Percentage of OperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax44.546.00.044.145.651.10.052.953.657.00.045.442.635.60.038.033.132.50.032.9

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0.934-0.037-12.2171.864-0.268-2.884-3.461-4.605-3.783-5.844-3.270.0871.1598.7762.2113.0714.1535.1822.6524.382
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.8-0.00.02.2-0.3-4.20.0-7.6-6.7-11.00.00.22.416.60.07.410.513.10.011.4

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value6.015-23.185270.139-0.023-0.0960.075-0.0460.012
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.0-20.40.00.2-0.0-0.10.0-0.10.0

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value6.015-23.185270.139-0.023-0.0960.075-0.0460.012
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.0-20.40.00.2-0.0-0.10.0-0.10.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-7590000.0-5611000.0-6487000.0-4206000.0-3868000.0-906000.0758000.0781000.0729000.0201000.059000.0103000.090000.049000.0222000.0-538000.0-991000.0-421000.0-311000.0-229000.0
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-6.3-4.90.0-5.0-5.0-1.30.01.31.30.40.00.20.20.10.0-1.3-2.5-1.10.0-0.6

Research And Development Expense

us-gaap:ResearchAndDevelopmentExpense

us-gaap:ResearchAndDevelopmentExpense


Research
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value121312109.5549.538.1497.9397.6567.7176.7865.8954.4353.7812.9272.7712.4092.6822.3632.39
Percentage of ResearchAndDevelopmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.611.70.012.112.413.90.013.113.514.50.011.79.27.10.06.76.16.80.06.2

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1201131138476686260565352504853424139393838
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ChangeInAccountingEstimateByType

band:EstimatedPeriodOfBenefitForNonrefundableUpfrontFees


Revenue
Period End2020-12-312020-09-302020-06-302020-03-31
Value-2.9110.4030.4370.439
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.60.50.60.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.60.50.60.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax band:EstimatedPeriodOfBenefitForNonrefundableUpfrontFees100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService

band:CPaaS


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value105100987367595351474544413938
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax87.188.386.887.087.386.386.285.184.584.484.382.382.573.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax87.188.386.887.087.386.386.285.184.584.484.382.382.573.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax band:CPaaS100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductAndServiceOther


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value151314109.7149.3978.568.9928.798.3088.1958.9178.47114
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.911.713.213.012.713.713.814.915.515.615.717.717.526.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.911.713.213.012.713.713.814.915.515.615.717.717.526.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductAndServiceOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService, us-gaap:StatementGeographical

band:CPaaS, country:US


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value9288877165574950474444413938
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax77.178.377.384.784.983.879.882.984.484.384.382.282.373.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax77.178.377.384.784.983.879.882.984.484.384.382.282.373.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax band:CPaaS country:US100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

band:CPaaS, us-gaap:NonUs


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1211101.9531.8691.7233.9361.3510.0820.0690.0270.0550.080.118
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.09.99.52.32.42.56.32.20.10.10.10.10.20.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.09.99.52.32.42.56.32.20.10.10.10.10.20.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax band:CPaaS us-gaap:NonUs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductAndServiceOther, country:US


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value131113109.4189.1258.0618.6528.7228.2298.1438.8438.40114
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.510.512.012.512.313.313.014.315.415.415.617.517.426.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.510.512.012.512.313.313.014.315.415.415.617.517.426.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductAndServiceOther country:US100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductAndServiceOther, us-gaap:NonUs


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1.7031.3971.3510.4120.2960.2720.4990.340.0680.0790.0520.0740.070.07
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.41.21.20.50.40.40.80.60.10.10.10.10.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.41.21.20.50.40.40.80.60.10.10.10.10.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductAndServiceOther us-gaap:NonUs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementBusinessSegments

band:CPaaS


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value105100987367595351474544413938343331313030
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax87.188.386.887.087.386.386.285.184.584.484.382.382.573.482.480.879.879.977.978.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax87.188.386.887.087.386.386.285.184.584.484.382.382.573.482.480.879.879.977.978.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax band:CPaaS100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllOtherSegments


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value151314109.7149.3978.568.9928.798.3088.1958.9178.471147.4857.9417.9797.9788.5848.354
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.911.713.213.012.713.713.814.915.515.615.717.717.526.617.619.220.220.122.121.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.911.713.213.012.713.713.814.915.515.615.717.717.526.617.619.220.220.122.121.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AllOtherSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1201131138476686260565352504853424139393838
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Selling And Marketing Expense

us-gaap:SellingAndMarketingExpense

us-gaap:SellingAndMarketingExpense


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1211139.0018.6559.4179.3738.7848.5148.3496.1335.4224.6544.5223.1193.1282.4132.5582.4182.418
Percentage of SellingAndMarketingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.410.611.910.611.313.715.114.515.015.711.710.79.68.57.37.66.16.56.26.3

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value109410708906706576653413203133031501491361151047269
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:StatementGeographical

us-gaap:NonUs


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value1010112.2782.3212.4372.9240.0
Percentage of Assets1.01.01.30.30.40.40.90.0
Percentage of Assets1.01.01.30.30.40.40.90.0
Percentage of Assets us-gaap:NonUs100.0100.0100.0100.0100.0100.0100.00.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value6496274603573453377150444141403532276570
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets59.358.651.753.352.450.720.915.814.213.827.727.425.828.226.689.9100.8

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value109410708906706576653413203133031501491361151047269
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-312014-12-31
Value4454424293133123282702702692611081081018376-14.499-22.374-19.074-16.748
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets40.741.448.346.747.649.379.184.285.886.272.372.674.271.873.4-20.0-32.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:CommonClassA, us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-31
Value0.0230.0230.0220.0210.020.0190.0190.0180.0180.0170.0130.0120.0120.0050.0040.00.00.0
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-0.0-0.0-0.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassA us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonClassB, us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-31
Value0.0020.0020.0020.0030.0040.0040.0050.0050.0050.0060.0060.0070.0070.0130.0130.00.00.0
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-0.0-0.0-0.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassB us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value104.756270.061-0.078-0.0550.041-0.0350.0320.007-0.001-0.003-0.002-0.0060.00.00.0
Percentage of StockholdersEquity2.41.16.50.0-0.0-0.00.0-0.00.00.0-0.0-0.0-0.0-0.00.0-0.0-0.0
Percentage of Assets1.00.43.10.0-0.0-0.00.0-0.00.00.0-0.0-0.0-0.0-0.00.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-31
Value4954924513423403342752732712671161141101021029.3563531
Percentage of StockholdersEquity111.4111.3105.0109.4108.7102.0102.0101.3100.9102.3107.2106.0108.9123.5133.6-41.8-185.8-185.5
Percentage of Assets45.346.050.751.151.750.380.785.486.688.277.577.080.988.898.113.40.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-31
Value-61.749-54.821-49.505-29.579-27.227-6.586-5.528-3.572-2.558-6.03-7.848-6.558-9.068-19.58-25.771-31.742-54.52-47.82
Percentage of StockholdersEquity-13.9-12.4-11.5-9.4-8.7-2.0-2.0-1.3-1.0-2.3-7.2-6.1-8.9-23.5-33.6141.9285.8285.5
Percentage of Assets-5.6-5.1-5.6-4.4-4.1-1.0-1.6-1.1-0.8-2.0-5.2-4.4-6.6-16.9-24.7-45.40.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value40840619359057756622623323323591958778653028
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets37.338.021.788.187.785.266.572.774.477.660.863.863.967.962.441.740.1

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302015-12-312014-12-31
Value3093197230029049118419214013841484538375.3665.6796.7885.819108.792
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets28.329.98.144.844.274.054.059.944.745.727.432.633.533.536.07.40.09.70.00.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value3193298130129151718519214013941484638375.5925.9025.747.02810
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets29.130.89.144.944.477.854.260.144.845.827.632.733.733.736.27.70.00.010.00.0

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value6351554641373030262724232324211816
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.84.86.26.96.35.68.89.48.59.216.015.916.821.120.325.824.1

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value2313141010109.268.358.5416.9716.1147.8397.3956.9533.7676.1574.416
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.11.31.61.51.71.52.72.62.72.34.15.35.46.03.68.56.3

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value8885817675696158535046444036
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets13.212.912.322.423.522.020.439.136.236.840.042.556.151.6

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

band:ComputerandOfficeEquipment


Property
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value4.7834.7644.7254.6278.0737.9467.8277.6627.3427.0287.457.5457.5257.539
Percentage of PropertyPlantAndEquipmentGross5.45.65.86.010.711.512.613.013.614.016.117.018.520.9
Percentage of Assets0.70.70.71.42.52.52.65.14.95.16.47.210.410.8
Percentage of Assets band:ComputerandOfficeEquipment0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

band:TelecommunicationsEquipment


Property
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value5250484438353130242221191613
Percentage of PropertyPlantAndEquipmentGross59.859.359.157.951.251.950.352.244.945.346.445.041.338.0
Percentage of Assets7.97.77.313.012.111.410.320.416.216.718.619.123.219.6
Percentage of Assets band:TelecommunicationsEquipment0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FurnitureAndFixtures


Property
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value2.3892.3882.3872.3732.5092.0861.7931.7411.3380.8720.8720.8630.680.68
Percentage of PropertyPlantAndEquipmentGross2.72.82.93.13.33.02.93.02.51.71.91.91.71.9
Percentage of Assets0.40.40.40.70.80.70.61.20.90.60.80.80.91.0
Percentage of Assets us-gaap:FurnitureAndFixtures0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LeaseholdImprovements


Property
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value5.8465.8465.8535.2634.6323.4672.3882.4381.9172.3740.4530.4530.4530.453
Percentage of PropertyPlantAndEquipmentGross6.66.97.16.96.15.03.94.13.64.71.01.01.11.3
Percentage of Assets0.90.90.91.51.41.10.81.61.31.70.40.40.60.6
Percentage of Assets us-gaap:LeaseholdImprovements0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:SoftwareAndSoftwareDevelopmentCosts


Property
Period End2020-09-302020-06-302020-03-312019-12-312018-12-31
Value2.9612.4272.0272.0181.805
Percentage of PropertyPlantAndEquipmentGross3.42.92.52.63.1
Percentage of Assets0.40.40.30.61.2
Percentage of Assets us-gaap:SoftwareAndSoftwareDevelopmentCosts0.00.00.00.00.0

us-gaap:SoftwareDevelopment


Property
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value1919181721191816191716151513
Percentage of PropertyPlantAndEquipmentGross22.122.622.623.428.728.630.227.735.534.234.735.037.437.9
Percentage of Assets2.92.92.85.36.76.36.210.812.812.613.914.820.919.5
Percentage of Assets us-gaap:SoftwareDevelopment0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value4441383439373533323030292824
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.66.35.710.212.311.911.722.421.622.626.328.239.035.6

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value4864000.04867000.03276000.0130000.0130000.0130000.0130000.0130000.0130000.0130000.0130000.0130000.0130000.0165000.0210000.0210000.0210000.0210000.0222000.0222000.0
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AmortizationOfIntangibleAssets us-gaap:IncomeStatementLocation

us-gaap:CostOfSales


Amortization
Period End2021-06-30
Value2175000.0
Percentage of AmortizationOfIntangibleAssets44.7
Percentage of Assets0.0
Percentage of Assets us-gaap:CostOfSales0.0

us-gaap:GeneralAndAdministrativeExpense


Amortization
Period End2021-06-302020-06-30
Value2689000.0130000.0
Percentage of AmortizationOfIntangibleAssets55.3100.0
Percentage of Assets0.00.0
Percentage of Assets us-gaap:GeneralAndAdministrativeExpense0.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value4343434136312625211915141211
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.66.76.612.211.210.18.716.714.614.213.714.317.116.0

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value3603563726.8676.8676.8676.8676.8676.8676.8676.8676.8676.8676.8676.8676.8676.867
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets32.933.341.81.01.01.02.02.12.22.34.64.65.05.96.69.59.8

us-gaap:Goodwill us-gaap:BusinessAcquisition

band:VoxboneSA


Goodwillus-gaap:
Period End2020-11-02
Value346
Percentage of Goodwill0.0
Percentage of Assets0.0
Percentage of Assets band:VoxboneSA0.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value2302322486.1796.3096.4396.5696.6996.8296.9597.0897.2197.3487.4787.6437.8538.482
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets21.121.827.90.91.01.01.92.12.22.34.74.85.46.57.310.812.1

us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:BusinessAcquisition

band:Dash


Intangible
Period End2021-06-302021-03-312020-12-312019-12-31
Value5.7895.9196.0496.569
Percentage of IntangibleAssetsNetExcludingGoodwill2.52.52.4100.0
Percentage of Assets0.50.60.71.9
Percentage of Assets band:Dash0.00.00.00.0

band:VoxboneSA


Intangible
Period End2021-06-302021-03-312020-12-31
Value224226242
Percentage of IntangibleAssetsNetExcludingGoodwill97.597.597.6
Percentage of Assets20.621.227.2
Percentage of Assets band:VoxboneSA0.00.00.0

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value2292322475.4155.5455.6755.8055.9356.0656.1956.3256.4556.5846.7146.8797.089
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets21.021.727.80.80.80.91.71.81.92.04.24.34.85.86.69.8

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:BusinessAcquisition, us-gaap:FiniteLivedIntangibleAssetsByMajorClass

band:Dash, us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312019-12-31
Value5.0255.1555.2855.805
Percentage of FiniteLivedIntangibleAssetsNet2.22.22.1100.0
Percentage of Assets0.50.50.61.7
Percentage of Assets band:Dash us-gaap:CustomerRelationships0.00.00.00.0

band:VoxboneSA, us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-31
Value144145154
Percentage of FiniteLivedIntangibleAssetsNet63.062.762.6
Percentage of Assets13.213.617.4
Percentage of Assets band:VoxboneSA us-gaap:CustomerRelationships0.00.00.0

band:VoxboneSA, us-gaap:DevelopedTechnologyRights


Finite
Period End2021-06-302021-03-312020-12-31
Value808187
Percentage of FiniteLivedIntangibleAssetsNet34.835.035.3
Percentage of Assets7.37.69.8
Percentage of Assets band:VoxboneSA us-gaap:DevelopedTechnologyRights0.00.00.0

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


Finite
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value5.4155.5455.6755.8055.9356.0656.1956.3256.4556.5846.7146.8446.9747.364
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.099.598.40.0
Percentage of Assets0.80.80.91.71.81.92.04.24.34.85.86.59.610.5
Percentage of Assets us-gaap:CustomerRelationships0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value16181917181921
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.51.72.22.62.83.06.2

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value7373000.02029000.01975000.01724000.01939000.01626000.01533000.01250000.02128000.01409000.0727000.0769000.0798000.01047000.01192000.01069000.01011000.0
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.20.20.30.30.20.40.40.70.50.50.50.60.91.11.51.4

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value8.2059.36117.7764.4745.3254.193.3433.0893.3693.4184.2941.7863.1543.0252.5184.688
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.91.31.20.70.81.21.01.01.12.32.91.32.72.93.56.7

Accrued Liabilities Current

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AccruedLiabilitiesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value6655633429232728242121201814151514
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.15.27.15.14.53.68.08.77.77.214.213.613.612.515.021.820.9

Contract With Customer Liability Current

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:ContractWithCustomerLiabilityCurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value6591000.06519000.06515000.05527000.05236000.05046000.05177000.05020000.04887000.05421000.07912000.05768000.0
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.60.60.70.80.80.81.51.61.61.85.35.5

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value9281925748434541343232312524242530
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.47.610.48.67.46.613.412.811.110.821.821.219.021.423.535.643.5

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value6000000.05594000.05515000.05162000.05067000.04973000.04876000.0
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.50.60.80.80.71.4

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherAccruedLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value1839000.02588000.02657000.0237000.0405000.01147000.0904000.0839000.0858000.0794000.0738000.0946000.0930000.0638000.0515000.0483000.0654000.0
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.30.00.10.20.30.30.30.30.50.60.70.60.50.70.9

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value471464282277272268
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0
Percentage of Assets43.143.431.741.441.540.3

us-gaap:LongTermDebt us-gaap:DebtInstrument

band:ZeroPointFiveZeroPercentConvertibleSeniorNotesDue2028


Long
Period End2021-06-302021-03-31
Value180177
Percentage of LongTermDebt38.238.3
Percentage of Assets16.516.6
Percentage of Assets band:ZeroPointFiveZeroPercentConvertibleSeniorNotesDue20280.00.0

band:ZeroPointTwoFivePercentConvertibleSeniorNotesDue2026


Long
Period End2021-06-302021-03-312020-12-31
Value291287282
Percentage of LongTermDebt61.861.7100.0
Percentage of Assets26.726.831.7
Percentage of Assets band:ZeroPointTwoFivePercentConvertibleSeniorNotesDue20260.00.00.0

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value4714642822772722680.0
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.00.0
Percentage of Assets43.143.431.741.441.540.30.0

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-06-302021-03-312020-12-31
Value595761
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0
Percentage of Assets5.45.46.8

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value4870000.01635000.01707000.02605000.02392000.0704000.0716000.01431000.0611000.0
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.20.21.71.80.60.72.00.9

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value14151715171819
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.31.51.92.32.62.85.8

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value6601000.06593000.06755000.06302000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0100.0
Percentage of Assets0.60.60.80.9

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value2679000.02670000.06623000.05926000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0100.0100.0
Percentage of Assets0.20.20.70.9

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value1657000.01648000.02701000.01987000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0100.0100.0
Percentage of Assets0.20.20.30.3

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-312020-09-30
Value1681000.0949000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0100.0
Percentage of Assets0.20.1

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value751000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets0.1

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value20212220222324
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.82.02.63.13.43.57.2

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value21232422
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0100.0100.0
Percentage of Assets2.02.22.83.4

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value1676000.01918000.02202000.02034000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0100.0
Percentage of Assets0.20.20.20.3

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-312014-12-31
Value4454424293133123282702702692611081081018376-14.499-22.374-19.074-16.748
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets40.741.448.346.747.649.379.184.285.886.272.372.674.271.873.4-20.0-32.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:CommonClassA, us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-31
Value0.0230.0230.0220.0210.020.0190.0190.0180.0180.0170.0130.0120.0120.0050.0040.00.00.0
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-0.0-0.0-0.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassA us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonClassB, us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-31
Value0.0020.0020.0020.0030.0040.0040.0050.0050.0050.0060.0060.0070.0070.0130.0130.00.00.0
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-0.0-0.0-0.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassB us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value104.756270.061-0.078-0.0550.041-0.0350.0320.007-0.001-0.003-0.002-0.0060.00.00.0
Percentage of StockholdersEquity2.41.16.50.0-0.0-0.00.0-0.00.00.0-0.0-0.0-0.0-0.00.0-0.0-0.0
Percentage of Assets1.00.43.10.0-0.0-0.00.0-0.00.00.0-0.0-0.0-0.0-0.00.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-31
Value4954924513423403342752732712671161141101021029.3563531
Percentage of StockholdersEquity111.4111.3105.0109.4108.7102.0102.0101.3100.9102.3107.2106.0108.9123.5133.6-41.8-185.8-185.5
Percentage of Assets45.346.050.751.151.750.380.785.486.688.277.577.080.988.898.113.40.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-31
Value-61.749-54.821-49.505-29.579-27.227-6.586-5.528-3.572-2.558-6.03-7.848-6.558-9.068-19.58-25.771-31.742-54.52-47.82
Percentage of StockholdersEquity-13.9-12.4-11.5-9.4-8.7-2.0-2.0-1.3-1.0-2.3-7.2-6.1-8.9-23.5-33.6141.9285.8285.5
Percentage of Assets-5.6-5.1-5.6-4.4-4.1-1.0-1.6-1.1-0.8-2.0-5.2-4.4-6.6-16.9-24.7-45.40.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value25000.025000.024000.024000.024000.023000.024000.023000.023000.023000.019000.019000.019000.018000.017000.030000.030000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStockValue us-gaap:StatementClassOfStock

us-gaap:CommonClassA


Common
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value22000.019000.013000.04000.00
Percentage of CommonStockValue91.779.268.423.50.0
Percentage of Assets0.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassA0.00.00.00.00.0

us-gaap:CommonClassB


Common
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2000.05000.06000.013000.00
Percentage of CommonStockValue8.320.831.676.50.0
Percentage of Assets0.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassB0.00.00.00.00.0

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value495492451342340334275273271267116114110102102109.356
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets45.346.050.751.151.750.380.785.486.688.277.577.080.988.898.114.713.4

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value-61749000.0-54821000.0-49505000.0-29579000.0-27227000.0-6586000.0-5528000.0-3572000.0-2558000.0-6030000.0-7848000.0-6558000.0-9068000.0-19580000.0-25771000.0-25172000.0-31742000.0
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-5.6-5.1-5.6-4.4-4.1-1.0-1.6-1.1-0.8-2.0-5.2-4.4-6.6-16.9-24.7-34.7-45.4

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value104.756270.061-0.078-0.0550.041-0.0350.0320.007-0.001-0.003-0.002-0.0060.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets1.00.43.10.0-0.0-0.00.0-0.00.00.0-0.0-0.0-0.0-0.00.0

Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3377000.04390000.02575000.02382000.02425000.02499000.01666000.01654000.01630000.01676000.01322000.0762000.0762000.0493000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3377000.04390000.02575000.02382000.02425000.02499000.01666000.01654000.01630000.01676000.01322000.0762000.0762000.0493000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value-1.16410-6.813117.291-7.6072.2271.9323.623-9.0350.6326.8845.874114.7774.845.975-0.9690.04
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.08.8-6.013.79.5-11.13.63.26.4-16.91.213.612.221.211.211.715.1-2.40.1

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value-7.77822-212.923-2.334-235.4-4.428-9.92349-3.628-43.824-8.394-7.637-5.752-9.9-3.054-2.191-1.911-0.807-2.142
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-6.419.5-188.3-2.8-306.6-6.5-16.082.2-6.4-82.2-16.0-15.1-11.9-18.7-7.2-5.3-4.8-2.0-5.5

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-1.097215-0.2110.0452.141344-0.1110.5821.4941500.4563.5566.909-0.2430-2.961
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.9189.7-0.20.12.8503.4-0.21.02.6282.20.97.014.3-0.572.0-7.2

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-10.237247-219.8869.414-225.951332-7.797521.48897-7.3062.8037.0311.10332-0.310.162-1.288
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-8.5218.4-194.511.1-294.2485.8-12.686.32.6183.0-14.05.614.62.176.0-0.70.4-3.3

Amortization Of Financing Costs

us-gaap:AmortizationOfFinancingCosts

us-gaap:AmortizationOfFinancingCosts


Amortization
Period End2020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-11-142017-12-312017-09-302017-06-302017-03-312016-12-31
Value100.030.0180.020.0170.1220.0160.0160.0160.0160.260.280.0320.0320.0320.025
Percentage of AmortizationOfFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfFinancingCosts us-gaap:DebtInstrument

band:ZeroPointFiveZeroPercentConvertibleSeniorNotesDue2028


Amortization
Period End2021-06-302021-03-31
Value2.0040.333
Percentage of AmortizationOfFinancingCosts0.00.0

band:ZeroPointTwoFivePercentConvertibleSeniorNotesDue2026


Amortization
Period End2021-06-302021-03-312020-06-302020-03-31
Value4.5874.514.2621.629
Percentage of AmortizationOfFinancingCosts0.00.00.00.0

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value1.308-1.0950.0120.016-2.337-0.411-2.828-6.599-7.664-1.792-2.364-9.2882.6112.7180.9940.8941.562-11.339
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value-269000.01387000.0-2590000.02864000.0-263000.0304000.01314000.0-74000.0340000.0-435000.0609000.01597000.0-1719000.0-656000.0-259000.0827000.0-1334000.0-1663000.0-844000.0
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value11-3.532.6144.6094.716.8990.8742.621-1.2063.8890.2290.779-1.4033.1792.5231.734-0.0360.1660.56
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value-1.16410-6.813117.291-7.6072.2271.9323.623-9.0350.6326.8845.874114.7774.845.975-0.9690.04
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.08.8-6.013.79.5-11.13.63.26.4-16.91.213.612.221.211.211.715.1-2.40.1

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-6.928-5.316-19.926-2.352-20.641-1.058-1.956-1.0143.4721.992-1.292.51106.191-0.5991.6341.9472.989143.288
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-5.7-4.7-17.6-2.8-26.9-1.5-3.2-1.76.13.7-2.55.021.811.7-1.44.04.97.537.48.5

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-6.928-5.316-19.926-2.352-20.641-1.058-1.956-1.0143.4721.992-1.292.51106.191
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-5.7-4.7-17.6-2.8-26.9-1.5-3.2-1.76.13.7-2.55.021.811.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value3377000.04390000.02575000.02382000.02425000.02499000.01666000.01654000.01630000.01676000.01322000.0762000.0762000.0493000.0701000.0612000.0244000.0246000.0271000.0
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value-7.77822-212.923-2.334-235.4-4.428-9.92349-3.628-43.824-8.394-7.637-5.752-9.9-3.054-2.191-1.911-0.807-2.142
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-6.419.5-188.3-2.8-306.6-6.5-16.082.2-6.4-82.2-16.0-15.1-11.9-18.7-7.2-5.3-4.8-2.0-5.5

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value6.7812.7371.9863.9123.6389.1275.2446.6051.2397.4981.8082.1520.9612.6981.20.9930.131.143
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-1.097215-0.2110.0452.141344-0.1110.5821.4941500.4563.5566.909-0.2430-2.961
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.9189.7-0.20.12.8503.4-0.21.02.6282.20.97.014.3-0.572.0-7.2

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-4.15.982.4-0.4-3.9910.721-0.1910.7352.1371.352-0.669-12.211-7.4160.2980.1650.3550.3840.372-0.8080.033
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value10.1710.1810.8210.8110.58.098.078.098.117.727.417.397.256.946.88
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-31
Value61
Percentage of DeferredTaxLiabilities100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value4046219.09815
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value2414000.01398000.01046000.0731000.0671000.0456000.0
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312018-12-312017-12-312016-12-31
Value370.00.00.0
Percentage of DeferredTaxAssetsValuationAllowance100.00.00.00.0

band:AccountsReceivableAllowanceForCreditLossForeignCurrencyTranslation

band:AccountsReceivableAllowanceForCreditLossForeignCurrencyTranslation


Accounts
Period End2021-06-302021-03-31
Value6000.0-23000.0
Percentage of AccountsReceivableAllowanceForCreditLossForeignCurrencyTranslation100.0100.0

band:AdjustmentsToAdditionalPaidInCapitalCappedCallOptionPurchaseCost

band:AdjustmentsToAdditionalPaidInCapitalCappedCallOptionPurchaseCost


Adjustments
Period End2021-03-312020-03-31
Value25-43.32
Percentage of AdjustmentsToAdditionalPaidInCapitalCappedCallOptionPurchaseCost100.0100.0

band:AdjustmentsToAdditionalPaidInCapitalCappedCallOptionPurchaseCost us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-03-312020-03-31
Value2543
Percentage of AdjustmentsToAdditionalPaidInCapitalCappedCallOptionPurchaseCost100.0-100.0

band:AdjustmentsToAdditionalPaidInCapitalConvertibleDebtIssuanceCost

band:AdjustmentsToAdditionalPaidInCapitalConvertibleDebtIssuanceCost


Adjustments
Period End2021-06-302021-03-312020-06-302020-03-31
Value-30000.02049000.011000.03731000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalConvertibleDebtIssuanceCost100.0100.0100.0100.0

band:AdjustmentsToAdditionalPaidInCapitalConvertibleDebtIssuanceCost us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-06-302020-03-31
Value-30000.02049000.011000.03731000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalConvertibleDebtIssuanceCost100.0100.0100.0100.0

band:AreaOfLandSold us-gaap:CounterpartyName, us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

band:AreaOfLandSold

band:USEFEdwardsMillOwnerLLC, band:UndevelopedLandRaleighNorthCarolina


Area
Period End2021-06-05
Value23.76
Percentage of AreaOfLandSold100.0

band:CappedCallOptionIssuanceCost

band:CappedCallOptionIssuanceCost


Capped
Period End2021-03-162020-02-28
Value2543
Percentage of CappedCallOptionIssuanceCost100.0100.0

band:DebtInstrumentConvertibleBeneficialConversionFeatureNet

band:DebtInstrumentConvertibleBeneficialConversionFeatureNet


Debt
Period End2021-06-302021-03-312020-12-312020-03-31
Value0.031860.0121
Percentage of DebtInstrumentConvertibleBeneficialConversionFeatureNet100.0100.00.0100.0

band:DebtInstrumentConvertibleBeneficialConversionFeatureNet us-gaap:DebtInstrument

band:ZeroPointFiveZeroPercentConvertibleSeniorNotesDue2028


Debt
Period End2021-06-302021-03-31
Value0.0364
Percentage of DebtInstrumentConvertibleBeneficialConversionFeatureNet100.034.8

band:ZeroPointTwoFivePercentConvertibleSeniorNotesDue2026


Debt
Period End2021-06-302021-03-312020-03-31
Value0.0121121
Percentage of DebtInstrumentConvertibleBeneficialConversionFeatureNet0.065.2100.0

band:DebtInstrumentConvertibleConversionCappedCallShares us-gaap:StatementClassOfStock

band:DebtInstrumentConvertibleConversionCappedCallShares

us-gaap:CommonClassA


Debt
Period End2021-03-162020-02-28
Value1917500.04394300.0
Percentage of DebtInstrumentConvertibleConversionCappedCallShares100.0100.0

band:DebtIssuanceCostsIncurredButNotYetPaid

band:DebtIssuanceCostsIncurredButNotYetPaid


Debt
Period End2021-03-312020-03-312019-03-31
Value659000.0875000.00
Percentage of DebtIssuanceCostsIncurredButNotYetPaid100.0100.00.0

band:DepreciationAndAmortizationNetOfAmortizationOfDebtIssuanceCosts

band:DepreciationAndAmortizationNetOfAmortizationOfDebtIssuanceCosts


Depreciation
Period End2021-06-302021-03-312020-06-302020-03-31
Value9.2029.0433.3423.298
Percentage of DepreciationAndAmortizationNetOfAmortizationOfDebtIssuanceCosts100.0100.0100.0100.0

band:DepreciationandAmortizationNetofAmortizationofDebtIssuanceCosts

band:DepreciationandAmortizationNetofAmortizationofDebtIssuanceCosts


Depreciationand
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value6.8763.2873.3423.2982.912.3072.1122.2091.7151.4261.2961.3871.441.4511.4451.3761.374
Percentage of DepreciationandAmortizationNetofAmortizationofDebtIssuanceCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

band:EquityAwardsWithheldForTaxLiabilitiesAccruedButNotPaid

band:EquityAwardsWithheldForTaxLiabilitiesAccruedButNotPaid


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-289000.0531000.0-101000.076000.034000.0238000.0-3000.0-87000.0-82000.0349000.00000
Percentage of EquityAwardsWithheldForTaxLiabilitiesAccruedButNotPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

band:EstimatedCostOfConstruction us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

band:EstimatedCostOfConstruction

band:UndevelopedLandRaleighNorthCarolina


Estimated
Period End2021-06-04
Value7752000.0
Percentage of EstimatedCostOfConstruction100.0

band:IncreaseDecreaseInOperatingLeaseLiability

band:IncreaseDecreaseInOperatingLeaseLiability


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-1371000.0-1357000.0-1332000.0-1327000.0-1285000.0-875000.0-768000.0-776000.0-938000.0
Percentage of IncreaseDecreaseInOperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0

band:PaymentsForCashConsideration us-gaap:BusinessAcquisition

band:PaymentsForCashConsideration

band:VoxboneSA


Payments
Period End2020-11-02
Value8153000.0
Percentage of PaymentsForCashConsideration100.0

band:WorldGrossDomesticProductOperationsPercent us-gaap:BusinessAcquisition

band:WorldGrossDomesticProductOperationsPercent

band:VoxboneSA


World
Period End2020-11-02
Value93.0
Percentage of WorldGrossDomesticProductOperationsPercent100.0

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value265000.03187000.0273000.0350000.0272000.01021000.0191000.0180000.0274000.0938000.0
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value265000.03187000.0273000.0350000.0272000.01021000.0191000.0180000.0274000.0938000.0
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature

us-gaap:AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature


Adjustments
Period End2021-03-312020-03-31
Value66104
Percentage of AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-03-312020-03-31
Value66104
Percentage of AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs


Allowance
Period End2021-06-302021-03-312020-06-302020-03-31
Value118000.010000.0277000.075000.0
Percentage of AllowanceForDoubtfulAccountsReceivableWriteOffs100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

band:AccountsReceivableExcludingCarrierAccessBillingCAB


Allowance
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value20000.0277000.075000.01053000.0398000.0209000.020000.062000.0102000.0209000.048000.068000.019000.031000.0124000.08000.025000.0
Percentage of AllowanceForDoubtfulAccountsReceivableWriteOffs0.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AmortizationOfDebtDiscountPremium

us-gaap:AmortizationOfDebtDiscountPremium


Amortization
Period End2020-12-312020-09-302019-09-30
Value676000.03000.0283000.0
Percentage of AmortizationOfDebtDiscountPremium100.0100.0100.0

us-gaap:AmortizationOfDebtDiscountPremium us-gaap:DebtInstrument

band:ZeroPointFiveZeroPercentConvertibleSeniorNotesDue2028


Amortization
Period End2021-06-302021-03-31
Value166000.028000.0
Percentage of AmortizationOfDebtDiscountPremium0.00.0

band:ZeroPointTwoFivePercentConvertibleSeniorNotesDue2026


Amortization
Period End2021-06-302021-03-312020-06-302020-03-31
Value301000.0296000.0280000.0106000.0
Percentage of AmortizationOfDebtDiscountPremium0.00.00.00.0

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AmortizationOfFinancingCostsAndDiscounts


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value7.1225.1864.7314.6024.5611.7530.0180.020.0170.122
Percentage of AmortizationOfFinancingCostsAndDiscounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationConsiderationTransferred1 us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationConsiderationTransferred1

band:VoxboneSA


Business
Period End2020-11-02
Value519
Percentage of BusinessCombinationConsiderationTransferred1100.0

us-gaap:BusinessCombinationConsiderationTransferred1 us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType

band:VoiceTopcoLimited, us-gaap:SubsequentEvent


Business
Period End2020-10-12
Value446
Percentage of BusinessCombinationConsiderationTransferred10.0

us-gaap:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable us-gaap:BusinessAcquisition, us-gaap:EquityInterestIssuedOrIssuableByType

us-gaap:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable

band:VoxboneSA, us-gaap:CommonStock


Business
Period End2020-11-02
Value106
Percentage of BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable100.0

us-gaap:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType

band:VoiceTopcoLimited, us-gaap:SubsequentEvent


Business
Period End2020-10-12
Value108
Percentage of BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable0.0

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:CapitalExpendituresIncurredButNotYetPaid


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2269000.01780000.03970000.0991000.0-1513000.02595000.0-1596000.0246000.0957000.01768000.0-903000.0-19000.01341000.0785000.0718000.094000.0-173000.0247000.0
Percentage of CapitalExpendituresIncurredButNotYetPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedComputerSoftwareAdditions

us-gaap:CapitalizedComputerSoftwareAdditions


Capitalized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1301000.01103000.0473000.0348000.0708000.0790000.0863000.01074000.01080000.0595000.0-1483000.01964000.01106000.0441000.0356000.0988000.0921000.0677000.0693000.0612000.0
Percentage of CapitalizedComputerSoftwareAdditions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedComputerSoftwareAmortization1

us-gaap:CapitalizedComputerSoftwareAmortization1


Capitalized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value525000.0420000.0416000.0377000.0588000.0582000.0388000.0463000.0384000.0789000.0496000.0432000.0425000.0448000.0474000.0524000.0556000.0580000.054000.0929000.0
Percentage of CapitalizedComputerSoftwareAmortization1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConcentrationRiskPercentage1 us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark

us-gaap:ConcentrationRiskPercentage1

band:CustomerOne, us-gaap:AccountsReceivable


Concentration
Period End2021-03-312020-03-312019-03-31
Value12.00.150.16
Percentage of ConcentrationRiskPercentage1100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:ContractWithCustomerLiabilityRevenueRecognized


Contract
Period End2020-12-312020-09-302020-06-302019-09-302019-06-30
Value818000.0849000.0846000.01601000.02390000.0
Percentage of ContractWithCustomerLiabilityRevenueRecognized100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentConvertibleBeneficialConversionFeature

us-gaap:DebtInstrumentConvertibleBeneficialConversionFeature


Debt
Period End2020-12-312020-09-302020-02-28
Value0.0-0.008125
Percentage of DebtInstrumentConvertibleBeneficialConversionFeature0.0100.0100.0

us-gaap:DebtInstrumentConvertibleBeneficialConversionFeature us-gaap:DebtInstrument

band:ZeroPointFiveZeroPercentConvertibleSeniorNotesDue2028


Debt
Period End2021-06-302021-03-31
Value0.066
Percentage of DebtInstrumentConvertibleBeneficialConversionFeature0.00.0

band:ZeroPointTwoFivePercentConvertibleSeniorNotesDue2026


Debt
Period End2021-06-302021-03-312020-03-31
Value0.0125125
Percentage of DebtInstrumentConvertibleBeneficialConversionFeature0.00.00.0

us-gaap:DebtInstrumentConvertibleBeneficialConversionFeature us-gaap:DebtInstrument, us-gaap:LongtermDebtType

band:ZeroPointFiveZeroPercentConvertibleSeniorNotesDue2028, us-gaap:ConvertibleDebt


Debt
Period End2021-03-16
Value66
Percentage of DebtInstrumentConvertibleBeneficialConversionFeature0.0

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-31
Value3000.04000.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses100.0100.0

us-gaap:DefinedBenefitPlanInterestCost us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-31
Value6000.05000.0
Percentage of DefinedBenefitPlanInterestCost100.0100.0

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-03-31
Value114000.0104000.00
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.00.0

us-gaap:DefinedBenefitPlanServiceCost us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-31
Value111000.0103000.0
Percentage of DefinedBenefitPlanServiceCost100.0100.0

us-gaap:DefinedContributionPlanEmployerDiscretionaryContributionAmount

us-gaap:DefinedContributionPlanEmployerDiscretionaryContributionAmount


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value841000.0912000.0619000.0474000.0475000.0634000.0430000.0415000.0373000.0513000.0310000.0261000.0259000.0287000.0210000.0181000.064000.0351000.0173000.0161000.0
Percentage of DefinedContributionPlanEmployerDiscretionaryContributionAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Depreciation

us-gaap:Depreciation


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value4.3384.1763.63.1573.2123.1682.782.1771.9822.0791.5851.2961.1661.2221.231.2411.2351.1661.1521.325
Percentage of Depreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Depreciation us-gaap:IncomeStatementLocation

us-gaap:CostOfSales


Depreciationus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value2.9383.0332.5782.2842.342.3342.061.71.531.2931.2761.1351.0151.0641.071.1611.0361.0471.061.155
Percentage of Depreciation67.772.671.672.372.973.774.178.177.262.280.587.687.087.187.093.683.989.892.087.2

us-gaap:GeneralAndAdministrativeExpense


Depreciationus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1.0780.8740.7630.6460.7120.690.6160.3850.3650.6890.240.1010.1080.1190.1230.0450.180.1020.1210.149
Percentage of Depreciation24.920.921.220.522.221.822.217.718.433.115.17.89.39.710.03.614.68.710.511.2

us-gaap:ResearchAndDevelopmentExpense


Depreciationus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0.2930.240.2290.1970.1290.1150.0710.0650.0630.0690.0530.0470.0310.0290.030.0290.0130.01-0.0350.015
Percentage of Depreciation6.85.76.46.24.03.62.63.03.23.33.33.62.72.42.42.31.10.9-3.01.1

us-gaap:SellingAndMarketingExpense


Depreciationus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0.0290.0290.030.030.0310.0290.0330.0270.0240.0280.0160.0130.0120.010.0070.0060.0060.0070.0060.006
Percentage of Depreciation0.70.70.81.01.00.91.21.21.21.31.01.01.00.80.60.50.50.60.50.5

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Effect
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-198000.0402000.061000.056000.017000.0-25000.010000.0-18000.0-1000.0000
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:FinanceLeaseInterestExpense

us-gaap:FinanceLeaseInterestExpense


Finance
Period End2021-06-30
Value9000.0
Percentage of FinanceLeaseInterestExpense100.0

us-gaap:FinanceLeaseInterestPaymentOnLiability

us-gaap:FinanceLeaseInterestPaymentOnLiability


Finance
Period End2021-06-302021-03-312020-06-302020-03-31
Value1540000.01415000.01327000.01285000.0
Percentage of FinanceLeaseInterestPaymentOnLiability100.0100.0100.0100.0

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeasePrincipalPayments


Finance
Period End2021-06-302021-03-31
Value61000.044000.0
Percentage of FinanceLeasePrincipalPayments100.0100.0

us-gaap:FinanceLeaseRightOfUseAssetAmortization

us-gaap:FinanceLeaseRightOfUseAssetAmortization


Finance
Period End2021-06-302021-03-31
Value58000.047000.0
Percentage of FinanceLeaseRightOfUseAssetAmortization100.0100.0

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

us-gaap:GainLossOnSaleOfPropertyPlantEquipment


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value-135000.0-201000.0-71000.0-3000.0-27000.0-233000.0-102000.0-3000.0-55000.0-296000.0-164000.0-17000.0-1000.0-9000.0-36000.0-46000.00-9000.0-8000.0
Percentage of GainLossOnSaleOfPropertyPlantEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:IncomeLossAttributableToParent

us-gaap:IncomeLossAttributableToParent


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-6.656-5.648-18.704-2.342-4.136-3.79-2.703-3.824-3.054-5.643-3.2110.191.249
Percentage of IncomeLossAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInAccruedLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value0.565-6.9134.6834.4487.408-4.9910.7783.1123.313-1.729-1.6452.9294.716-1.1740.0063.4961.714-3.9431.031
Percentage of IncreaseDecreaseInAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInContractWithCustomerLiability


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1113000.0-953000.01035000.0763000.0-58000.01105000.0-431000.02032000.0-520000.0-527000.0672000.01206000.0-1735000.05876000.0
Percentage of IncreaseDecreaseInContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInDeferredCharges

us-gaap:IncreaseDecreaseInDeferredCharges


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value405000.0352000.0365000.0616000.0188000.0396000.027000.01332000.0-686000.0-604000.0102000.0-120000.0-79000.0-146000.0-2650000.02958000.0197000.0401000.0304000.0
Percentage of IncreaseDecreaseInDeferredCharges100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value4654000.0-925000.01234000.0-1017000.01050000.0991000.01130000.0-540000.02034000.01552000.0804000.0502000.0149000.0471000.0152000.0290000.0-52000.01232000.0-573000.0
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseDebtExcludingAmortization

us-gaap:InterestExpenseDebtExcludingAmortization


Interest
Period End2020-12-312020-09-302019-09-30
Value595000.0-3000.0246000.0
Percentage of InterestExpenseDebtExcludingAmortization100.0100.0100.0

us-gaap:InterestExpenseDebtExcludingAmortization us-gaap:DebtInstrument

band:ZeroPointFiveZeroPercentConvertibleSeniorNotesDue2028


Interest
Period End2021-06-302021-03-31
Value313000.052000.0
Percentage of InterestExpenseDebtExcludingAmortization0.00.0

band:ZeroPointTwoFivePercentConvertibleSeniorNotesDue2026


Interest
Period End2021-06-302021-03-312020-06-302020-03-31
Value250000.0250000.0249000.096000.0
Percentage of InterestExpenseDebtExcludingAmortization0.00.00.00.0

us-gaap:LeaseCost

us-gaap:LeaseCost


Lease
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1660000.01565000.01492000.01365000.01365000.01365000.01226000.01477000.01234000.0967000.0
Percentage of LeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic

us-gaap:NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-6.928-5.316-19.926-2.352-20.641-1.058-1.956-1.0143.4721.992-1.292.51106.191-0.3851.4211.6932.598123.485
Percentage of NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseCost


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1689000.01614000.01566000.01461000.01461000.01461000.01322000.01573000.01434000.01218000.0
Percentage of OperatingLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePayments


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1479000.01371000.01357000.01332000.01327000.01285000.0875000.0768000.0776000.0938000.0
Percentage of OperatingLeasePayments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseRightOfUseAssetAmortizationExpense

us-gaap:OperatingLeaseRightOfUseAssetAmortizationExpense


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value1438000.01347000.01290000.01190000.01174000.01158000.01143000.01127000.0
Percentage of OperatingLeaseRightOfUseAssetAmortizationExpense100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value6.015-23.185270.139-0.023-0.0960.075-0.0460.0120.00.00.00.0
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value6.015-23.185270.139-0.023-0.0960.076-0.0670.0250.0080.002-0.001
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Other
Period End2021-06-302021-03-31
Value114000.0104000.0
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax100.0100.0

us-gaap:PaymentsForHedgeFinancingActivities

us-gaap:PaymentsForHedgeFinancingActivities


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value0.0250.00.00.0430.00.0
Percentage of PaymentsForHedgeFinancingActivities0.0100.00.00.00.0100.00.00.0

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDebtIssuanceCosts


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value0.5447.00.0250.00.917110.0250.0170.00.1250.0250.00.00.00.0250.541
Percentage of PaymentsOfDebtIssuanceCosts100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.00.00.00.0100.0100.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value556000.02900000.0372000.0274000.0238000.0960000.0194000.0267000.0356000.0589000.00000
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:PaymentsToAcquireBusinessesGross us-gaap:BusinessAcquisition

us-gaap:PaymentsToAcquireBusinessesGross

band:VoxboneSA


Payments
Period End2020-11-02
Value413
Percentage of PaymentsToAcquireBusinessesGross100.0

us-gaap:PaymentsToAcquireBusinessesGross us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType

band:VoiceTopcoLimited, us-gaap:SubsequentEvent


Payments
Period End2020-10-12
Value400
Percentage of PaymentsToAcquireBusinessesGross0.0

us-gaap:PaymentsToAcquireLandHeldForUse us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:PaymentsToAcquireLandHeldForUse

band:UndevelopedLandRaleighNorthCarolina


Payments
Period End2021-06-04
Value30
Percentage of PaymentsToAcquireLandHeldForUse100.0

us-gaap:PaymentsToDevelopSoftware

us-gaap:PaymentsToDevelopSoftware


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value1301000.01103000.0473000.0348000.0708000.0790000.0795000.01074000.01080000.0595000.0-1483000.01964000.01106000.0441000.0356000.0988000.0921000.0677000.0693000.0
Percentage of PaymentsToDevelopSoftware100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromCollectionOfAdvanceToAffiliate us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:ProceedsFromCollectionOfAdvanceToAffiliate

band:RelayFormerlyRepublicWirelessInc, srt:AffiliatedEntity


Proceeds
Period End2021-06-302020-06-30
Value0241000.0
Percentage of ProceedsFromCollectionOfAdvanceToAffiliate0.0100.0

band:RepublicWirelessInc, srt:AffiliatedEntity


Proceeds
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value344000.0106000.0747000.0241000.0308000.012000.0442000.0714000.0613000.0
Percentage of ProceedsFromCollectionOfAdvanceToAffiliate0.00.00.0100.00.00.00.00.00.0

us-gaap:ProceedsFromConvertibleDebt

us-gaap:ProceedsFromConvertibleDebt


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value0.02500.00.00.04000.00.0
Percentage of ProceedsFromConvertibleDebt0.0100.00.00.00.0100.00.00.0

us-gaap:ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNet us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNet

band:ZeroPointFiveZeroPercentConvertibleSeniorNotesDue2028, us-gaap:ConvertibleDebt


Proceeds
Period End2021-03-16
Value216
Percentage of ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNet100.0

us-gaap:ProceedsFromSaleAndMaturityOfOtherInvestments

us-gaap:ProceedsFromSaleAndMaturityOfOtherInvestments


Proceeds
Period End2021-06-302021-03-31
Value10.030
Percentage of ProceedsFromSaleAndMaturityOfOtherInvestments100.0100.0

us-gaap:ProceedsFromSaleOfLandHeldForUse us-gaap:CounterpartyName, us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:ProceedsFromSaleOfLandHeldForUse

band:USEFEdwardsMillOwnerLLC, band:UndevelopedLandRaleighNorthCarolina


Proceeds
Period End2021-06-05
Value17
Percentage of ProceedsFromSaleOfLandHeldForUse100.0

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProceedsFromStockOptionsExercised


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.0640.7380.2140.3193.2960.2440.1080.8682.4463.9350.4993.586.9330.034
Percentage of ProceedsFromStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:ProvisionForDoubtfulAccounts


Provision
Period End2021-06-302021-03-312020-06-302020-03-31
Value0.2580.048-0.0090.189
Percentage of ProvisionForDoubtfulAccounts100.0100.0100.0100.0

us-gaap:ProvisionForDoubtfulAccounts us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

band:AccountsReceivableExcludingCarrierAccessBillingCAB


Provision
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0.312-0.0090.1890.4160.7110.2840.1320.1710.0730.2090.0010.0810.0830.055-0.0430.193-0.087
Percentage of ProvisionForDoubtfulAccounts0.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RevenueFromRelatedParties us-gaap:CounterpartyName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RevenueFromRelatedParties

band:RelayFormerlyRepublicWirelessInc, band:MasterServicesAgreement, srt:AffiliatedEntity


Revenue
Period End2021-06-302020-06-30
Value462000.0583000.0
Percentage of RevenueFromRelatedParties100.0100.0

band:RelayFormerlyRepublicWirelessInc, band:ServicesAgreement, srt:AffiliatedEntity


Revenue
Period End2021-06-302020-06-30
Value6000.016000.0
Percentage of RevenueFromRelatedParties1.32.7

band:RepublicWirelessInc, band:MasterServicesAgreement, srt:AffiliatedEntity


Revenue
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value487000.0523000.0541000.0583000.0533000.0509000.0524000.0677000.0892000.0
Percentage of RevenueFromRelatedParties0.00.00.0100.00.00.00.00.00.0

band:RepublicWirelessInc, band:ServicesAgreement, srt:AffiliatedEntity


Revenue
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value6000.06000.016000.016000.031000.0
Percentage of RevenueFromRelatedParties0.00.00.02.70.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-31
Value5.5163.361.14
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-31
Value-0.92153.98.82
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-31
Value6.3648.452.14
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-31
Value0.4827.6972.205
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-31
Value0.929.57-0.01
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-31
Value-0.1813.020.09
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice100.0100.0100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1


Sharebased
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value24000.021000.094000.0193000.083000.046000.0227000.0222000.0223000.057000.0263000.0246000.0360000.0111000.0229000.0443000.0510000.0117000.0182000.0188000.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShortTermLeaseCost

us-gaap:ShortTermLeaseCost


Short
Period End2021-06-302021-03-312020-06-302020-03-31
Value381000.0345000.000
Percentage of ShortTermLeaseCost100.0100.00.00.0

us-gaap:StockIssuedDuringPeriodValueAcquisitions

us-gaap:StockIssuedDuringPeriodValueAcquisitions


Stock
Period End2020-12-31
Value106
Percentage of StockIssuedDuringPeriodValueAcquisitions100.0

us-gaap:StockIssuedDuringPeriodValueAcquisitions us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:CommonClassA, us-gaap:CommonStock


Stock
Period End2020-12-31
Value0.001
Percentage of StockIssuedDuringPeriodValueAcquisitions0.0

us-gaap:StockIssuedDuringPeriodValueAcquisitions us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2020-12-31
Value106
Percentage of StockIssuedDuringPeriodValueAcquisitions100.0

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecurities us-gaap:ConversionOfStockByUniqueDescription

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecurities

band:ClassBVotingCommonStocktoClassAVotingCommonStock


Stock
Period End2021-03-312020-12-312020-03-312019-12-312019-06-30
Value0.001-0.001-0.0010.0010.0
Percentage of StockIssuedDuringPeriodValueConversionOfConvertibleSecurities100.0100.0100.0100.00.0

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecurities us-gaap:ConversionOfStockByUniqueDescription, us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

band:ClassBVotingCommonStocktoClassAVotingCommonStock, us-gaap:CommonClassA, us-gaap:CommonStock


Stock
Period End2021-03-312020-09-302019-12-312019-06-302018-12-312018-06-30
Value0.0010.0010.0010.0010.0010.006
Percentage of StockIssuedDuringPeriodValueConversionOfConvertibleSecurities100.00.0100.00.00.00.0

band:ClassBVotingCommonStocktoClassAVotingCommonStock, us-gaap:CommonClassB, us-gaap:CommonStock


Stock
Period End2020-12-312020-09-302020-03-312019-06-302018-12-312018-06-30
Value-0.001-0.001-0.001-0.001-0.001-0.006
Percentage of StockIssuedDuringPeriodValueConversionOfConvertibleSecurities100.00.0100.00.00.00.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.0460.7530.1490.3863.2970.2440.1080.8682.4463.9350.53.5796.9330.035
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.0460.7530.1490.3863.2960.2440.1080.8682.4463.9340.53.5796.9320.034
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.097.1

us-gaap:SubleaseIncome

us-gaap:SubleaseIncome


Sublease
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value96000.096000.096000.096000.096000.096000.096000.096000.0200000.0251000.0
Percentage of SubleaseIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

band:ContractWithCustomerLiabilityRevenueExpectedToBeRecognizedInTheNextTwelveMonths

band:ContractWithCustomerLiabilityRevenueExpectedToBeRecognizedInTheNextTwelveMonths


Contract
Period End2020-09-30
Value5527000.0
Percentage of ContractWithCustomerLiabilityRevenueExpectedToBeRecognizedInTheNextTwelveMonths100.0

band:DebtInstrumentConvertibleInitialCapPrice us-gaap:DebtInstrument, us-gaap:LongtermDebtType

band:DebtInstrumentConvertibleInitialCapPrice

band:ZeroPointFiveZeroPercentConvertibleSeniorNotesDue2028, us-gaap:ConvertibleDebt


Debt
Period End2021-03-16
Value260.76
Percentage of DebtInstrumentConvertibleInitialCapPrice100.0

band:DebtInstrumentConvertibleInitialConversionStrikePrice us-gaap:DebtInstrument, us-gaap:LongtermDebtType

band:DebtInstrumentConvertibleInitialConversionStrikePrice

band:ZeroPointFiveZeroPercentConvertibleSeniorNotesDue2028, us-gaap:ConvertibleDebt


Debt
Period End2021-03-16
Value179.27
Percentage of DebtInstrumentConvertibleInitialConversionStrikePrice100.0

band:DebtInstrumentInterestRateAnnualEffectivePercentage us-gaap:DebtInstrument, us-gaap:LongtermDebtType

band:DebtInstrumentInterestRateAnnualEffectivePercentage

band:ZeroPointFiveZeroPercentConvertibleSeniorNotesDue2028, us-gaap:ConvertibleDebt


Debt
Period End2021-03-16
Value4.966
Percentage of DebtInstrumentInterestRateAnnualEffectivePercentage100.0

band:DebtIssuanceCostsConvertibleDebtEquityComponent

band:DebtIssuanceCostsConvertibleDebtEquityComponent


Debt
Period End2020-12-312020-09-302020-06-302020-02-28
Value3742000.03742000.03742000.0-3731000.0
Percentage of DebtIssuanceCostsConvertibleDebtEquityComponent100.0100.0100.0100.0

band:DebtIssuanceCostsConvertibleDebtEquityComponent us-gaap:DebtInstrument, us-gaap:LongtermDebtType

band:ZeroPointFiveZeroPercentConvertibleSeniorNotesDue2028, us-gaap:ConvertibleDebt


Debt
Period End2021-06-302021-03-312021-03-16
Value2019000.02049000.02049000.0
Percentage of DebtIssuanceCostsConvertibleDebtEquityComponent0.00.00.0

band:DebtIssuanceCostsConvertibleDebtLiabilityComponent us-gaap:DebtInstrument, us-gaap:LongtermDebtType

band:DebtIssuanceCostsConvertibleDebtLiabilityComponent

band:ZeroPointFiveZeroPercentConvertibleSeniorNotesDue2028, us-gaap:ConvertibleDebt


Debt
Period End2021-03-16
Value5607000.0
Percentage of DebtIssuanceCostsConvertibleDebtLiabilityComponent100.0

band:DeferredTaxAssetsOperatingLeaseArrangements

band:DeferredTaxAssetsOperatingLeaseArrangements


Deferred
Period End2020-12-312019-12-312018-12-31
Value4878000.06335000.00
Percentage of DeferredTaxAssetsOperatingLeaseArrangements100.0100.00.0

band:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfSalaryIncrease

band:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfSalaryIncrease


Defined
Period End2020-12-31
Value4.07
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfSalaryIncrease100.0

band:DefinedBenefitPlanExpectedFutureBenefitPayments us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

band:DefinedBenefitPlanExpectedFutureBenefitPayments

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-31
Value92000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPayments100.0

band:FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour

band:FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour


Finite
Period End2021-06-302021-03-312020-09-30
Value1431413.205
Percentage of FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour100.0100.0100.0

band:LandUseParkingLiability

band:LandUseParkingLiability


Land
Period End2021-06-30
Value7752000.0
Percentage of LandUseParkingLiability100.0

band:LeaseLiability

band:LeaseLiability


Lease
Period End2021-06-302021-03-312020-12-312019-12-31
Value20212324
Percentage of LeaseLiability100.0100.0100.0100.0

band:LeaseRightOfUseAsset

band:LeaseRightOfUseAsset


Lease
Period End2021-06-302021-03-312020-12-312019-12-31
Value17181921
Percentage of LeaseRightOfUseAsset100.0100.0100.0100.0

band:LesseeLeaseRestorationObligation

band:LesseeLeaseRestorationObligation


Lessee
Period End2020-12-31
Value240000.0
Percentage of LesseeLeaseRestorationObligation100.0

band:LesseeOperatingLeaseLiabilityToBePaidAfterYearFour

band:LesseeOperatingLeaseLiabilityToBePaidAfterYearFour


Lessee
Period End2021-06-302021-03-31
Value726000.0718000.0
Percentage of LesseeOperatingLeaseLiabilityToBePaidAfterYearFour100.0100.0

band:OperatingLeaseRightOfUseAssetAccumulatedAmortization

band:OperatingLeaseRightOfUseAssetAccumulatedAmortization


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value11109.0837.7916.6015.4274.269
Percentage of OperatingLeaseRightOfUseAssetAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0

band:SubleaseAreaOfRealEstateProperty us-gaap:RelatedPartyTransactionsByRelatedParty

band:SubleaseAreaOfRealEstateProperty

band:RelayInc


Sublease
Period End2021-06-30
Value17073.0
Percentage of SubleaseAreaOfRealEstateProperty100.0

dei:EntityCommonStockSharesOutstanding us-gaap:StatementClassOfStock

dei:EntityCommonStockSharesOutstanding

us-gaap:CommonClassA


Entity
Period End2020-07-242020-04-302020-01-312019-10-312019-07-312019-04-302019-01-312018-10-222018-07-312018-04-302018-01-312017-11-30
Value2019181817161312114.2079084.1978314.197831
Percentage of EntityCommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonClassB


Entity
Period End2020-07-242020-04-302020-01-312019-10-312019-07-312019-04-302019-01-312018-10-222018-07-312018-04-302018-01-312017-11-30
Value3.4995544.4271514.9274014.92745.627066.4535016.5107316.6996917.040405131313
Percentage of EntityCommonStockSharesOutstanding16.922.826.526.531.739.049.052.959.7321.0320.2319.8

us-gaap:AccountsReceivableGrossCurrent

us-gaap:AccountsReceivableGrossCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value3122262019161414121513121315444031
Percentage of AccountsReceivableGrossCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableRelatedPartiesCurrent us-gaap:CounterpartyName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:AccountsReceivableRelatedPartiesCurrent

band:RelayFormerlyRepublicWirelessInc, band:MasterServicesAgreement, srt:AffiliatedEntity


Accounts
Period End2021-06-302020-12-31
Value154000.0170000.0
Percentage of AccountsReceivableRelatedPartiesCurrent100.0100.0

band:RepublicWirelessInc, band:MasterServicesAgreement, srt:AffiliatedEntity


Accounts
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value153000.0170000.0183000.0192000.0153000.0161000.0327000.0
Percentage of AccountsReceivableRelatedPartiesCurrent0.0100.00.00.00.00.00.0

band:RepublicWirelessInc, band:ServicesAgreement, srt:AffiliatedEntity


Accounts
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value2000.02000.05000.05000.010000.010000.0
Percentage of AccountsReceivableRelatedPartiesCurrent0.01.20.00.00.00.0

us-gaap:AccruedLiabilitiesAndOtherLiabilities

us-gaap:AccruedLiabilitiesAndOtherLiabilities


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value6655633429232728242121201814151514
Percentage of AccruedLiabilitiesAndOtherLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedLiabilitiesCurrentAndNoncurrent

us-gaap:AccruedLiabilitiesCurrentAndNoncurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value333231181513121311118.292119.9557.8786.8518.3196.853
Percentage of AccruedLiabilitiesCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AllowanceForDoubtfulAccountsReceivable


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1.3641.2181.2030.8890.5970.8830.7691.4061.0931.0180.9060.7861.4731.2932
Percentage of AllowanceForDoubtfulAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value1.3641.2181.2030.8890.5970.8830.7691.4061.0931.0180.9060.7861.4731.29323022
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AreaOfLand us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:AreaOfLand

band:UndevelopedLandRaleighNorthCarolina


Area
Period End2021-06-052021-06-04
Value17.0640.0
Percentage of AreaOfLand100.0100.0

us-gaap:AreaOfRealEstateProperty

us-gaap:AreaOfRealEstateProperty


Area
Period End2021-03-312020-12-312020-09-302019-05-292019-04-042019-04-032018-12-312018-07-202018-06-302018-03-272018-01-122017-04-142016-11-30
Value17073.017073.017073.017073.09408.04122.087605.02605.0178000.05930.040035.040657.040657.0
Percentage of AreaOfRealEstateProperty100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AreaOfRealEstateProperty us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

band:LeaseAgreementRaleighNorthCarolina


Area
Period End2021-05-27
Value534000.0
Percentage of AreaOfRealEstateProperty0.0

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:AssetsFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, band:FinancialAssets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value299308974684893901000.308747625301528
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:FairValueMeasurementsRecurring, band:FinancialAssets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value2993089746848939010011818919151514328
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.038411.7253.7249.5201.6169.2284.4100.0

us-gaap:BusinessCombinationAcquiredReceivablesEstimatedUncollectible us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationAcquiredReceivablesEstimatedUncollectible

band:VoxboneSA


Business
Period End2020-12-31
Value580000.0
Percentage of BusinessCombinationAcquiredReceivablesEstimatedUncollectible100.0

us-gaap:BusinessCombinationAcquiredReceivablesGrossContractualAmount us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationAcquiredReceivablesGrossContractualAmount

band:VoxboneSA


Business
Period End2020-12-31
Value6453000.0
Percentage of BusinessCombinationAcquiredReceivablesGrossContractualAmount100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents

band:VoxboneSA


Business
Period End2020-11-02
Value4360000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther

band:VoxboneSA


Business
Period End2020-11-02
Value3315000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables

band:VoxboneSA


Business
Period End2020-11-02
Value5873000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities

band:VoxboneSA


Business
Period End2020-11-02
Value17
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities

band:VoxboneSA


Business
Period End2020-11-02
Value58
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill

band:VoxboneSA


Business
Period End2020-11-02
Value232
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles

band:VoxboneSA


Business
Period End2020-11-02
Value232
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles us-gaap:BusinessAcquisition, us-gaap:FiniteLivedIntangibleAssetsByMajorClass

band:VoxboneSA, us-gaap:CustomerRelationships


Business
Period End2020-11-02
Value148
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles63.8

band:VoxboneSA, us-gaap:DevelopedTechnologyRights


Business
Period End2020-11-02
Value84
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles36.2

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet

band:VoxboneSA


Business
Period End2020-11-02
Value172
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentAssets us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentAssets

band:VoxboneSA


Business
Period End2020-11-02
Value3418000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentAssets100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities

band:VoxboneSA


Business
Period End2020-11-02
Value4881000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment

band:VoxboneSA


Business
Period End2020-11-02
Value3865000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet

band:VoxboneSA


Business
Period End2020-11-02
Value519
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet100.0

us-gaap:CapitalizedComputerSoftwareGross

us-gaap:CapitalizedComputerSoftwareGross


Capitalized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value5957000.05746000.03271000.03795000.04056000.0
Percentage of CapitalizedComputerSoftwareGross100.0100.0100.0100.0100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:CashAndCashEquivalentsFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Cash
Period End2021-03-312018-06-302018-03-312017-12-312017-09-302016-12-31
Value2981515280.0640.063
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, band:FinancialAssetsExcludingMarketableSecurities


Cash
Period End2020-09-302020-06-302019-09-302019-06-302019-03-312018-12-312018-09-30
Value2372580.30819178.19415
Percentage of CashAndCashEquivalentsFairValueDisclosure0.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, us-gaap:BankTimeDeposits


Cash
Period End2021-06-302021-03-312020-06-302020-03-312019-12-31
Value15152525575
Percentage of CashAndCashEquivalentsFairValueDisclosure0.05.00.00.00.0

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, us-gaap:MoneyMarketFunds


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value28428357237233135250.30819178.194151515
Percentage of CashAndCashEquivalentsFairValueDisclosure0.095.00.00.00.00.00.00.00.00.00.00.0100.0100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Cash
Period End2021-03-312018-06-302018-03-312017-12-312017-09-302016-12-31
Value2983229280.0640.063
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0212.0190.1100.0100.0100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:FairValueMeasurementsRecurring, band:FinancialAssetsExcludingMarketableSecurities


Cash
Period End2020-09-302020-06-302019-09-302019-06-302019-03-312018-12-312018-09-30
Value2372581181341323436
Percentage of CashAndCashEquivalentsFairValueDisclosure0.00.00.00.00.00.00.0

us-gaap:FairValueMeasurementsRecurring, us-gaap:BankTimeDeposits


Cash
Period End2021-06-302021-03-312020-06-302020-03-312019-12-31
Value15152525575
Percentage of CashAndCashEquivalentsFairValueDisclosure0.05.00.00.00.0

us-gaap:FairValueMeasurementsRecurring, us-gaap:MoneyMarketFunds


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value28428357237233135250.30819178.194151515
Percentage of CashAndCashEquivalentsFairValueDisclosure0.095.00.00.00.00.00.00.00.00.00.00.0100.0100.0

us-gaap:ContractWithCustomerAssetNet

us-gaap:ContractWithCustomerAssetNet


Contract
Period End2020-12-312019-12-31
Value5530
Percentage of ContractWithCustomerAssetNet100.0100.0

us-gaap:ContractWithCustomerLiability

us-gaap:ContractWithCustomerLiability


Contract
Period End2020-12-312019-12-31
Value1210
Percentage of ContractWithCustomerLiability100.0100.0

us-gaap:ContractWithCustomerLiabilityNoncurrent

us-gaap:ContractWithCustomerLiabilityNoncurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value6871000.06592000.06386000.06331000.06352000.06272000.05720000.05755000.05900000.06359000.06424000.02549000.0
Percentage of ContractWithCustomerLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerRefundLiability

us-gaap:ContractWithCustomerRefundLiability


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value4998000.04242000.05429000.05016000.04523000.04851000.04167000.04720000.02676000.02203000.02588000.0
Percentage of ContractWithCustomerRefundLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent

band:ZeroPointFiveZeroPercentConvertibleSeniorNotesDue2028, us-gaap:ConvertibleDebt


Debt
Period End2021-03-16
Value39
Percentage of DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent100.0

us-gaap:DebtInstrumentConvertibleConversionPrice1 us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentConvertibleConversionPrice1

band:ZeroPointFiveZeroPercentConvertibleSeniorNotesDue2028, us-gaap:ConvertibleDebt


Debt
Period End2021-03-16
Value179.27
Percentage of DebtInstrumentConvertibleConversionPrice1100.0

us-gaap:DebtInstrumentInterestRateEffectivePercentage us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentInterestRateEffectivePercentage

band:ZeroPointFiveZeroPercentConvertibleSeniorNotesDue2028, us-gaap:ConvertibleDebt


Debt
Period End2021-03-16
Value5.125
Percentage of DebtInstrumentInterestRateEffectivePercentage100.0

us-gaap:DebtInstrumentUnamortizedDiscount

us-gaap:DebtInstrumentUnamortizedDiscount


Debt
Period End2020-12-312020-09-30
Value110114
Percentage of DebtInstrumentUnamortizedDiscount100.0100.0

us-gaap:DebtInstrumentUnamortizedDiscount us-gaap:DebtInstrument

band:ZeroPointFiveZeroPercentConvertibleSeniorNotesDue2028


Debt
Period End2021-06-302021-03-31
Value6466
Percentage of DebtInstrumentUnamortizedDiscount0.00.0

band:ZeroPointTwoFivePercentConvertibleSeniorNotesDue2026


Debt
Period End2021-06-302021-03-312020-12-31
Value101106110
Percentage of DebtInstrumentUnamortizedDiscount0.00.0100.0

us-gaap:DebtIssuanceCostsLineOfCreditArrangementsNet

us-gaap:DebtIssuanceCostsLineOfCreditArrangementsNet


Debt
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value83000.076000.096000.0107000.0125000.0
Percentage of DebtIssuanceCostsLineOfCreditArrangementsNet100.0100.0100.0100.0100.0

us-gaap:DebtIssuanceCostsLineOfCreditArrangementsNet us-gaap:BalanceSheetLocation

us-gaap:OtherNoncurrentAssets


Debt
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value9000.021000.034000.043000.055000.0
Percentage of DebtIssuanceCostsLineOfCreditArrangementsNet10.827.635.440.244.0

us-gaap:PrepaidExpensesAndOtherCurrentAssets


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value064000.074000.055000.062000.064000.070000.0
Percentage of DebtIssuanceCostsLineOfCreditArrangementsNet0.00.089.272.464.659.856.0

us-gaap:DeferredCosts

us-gaap:DeferredCosts


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value4022000.03795000.03604000.03412000.03042000.03054000.01952000.01901000.01038000.01433000.01828000.01771000.01811000.01933000.02068000.04903000.01696000.0
Percentage of DeferredCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCostsCurrent

us-gaap:DeferredCostsCurrent


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-31
Value2750000.02572000.02411000.02238000.01992000.01792000.02498000.02522000.02053000.02344000.02630000.02633000.02099000.0
Percentage of DeferredCostsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredFinanceCostsNet


Deferred
Period End2020-12-312020-09-30
Value7258000.07548000.0
Percentage of DeferredFinanceCostsNet100.0100.0

us-gaap:DeferredFinanceCostsNet us-gaap:DebtInstrument

band:ZeroPointFiveZeroPercentConvertibleSeniorNotesDue2028


Deferred
Period End2021-06-302021-03-31
Value5332000.05579000.0
Percentage of DeferredFinanceCostsNet0.00.0

band:ZeroPointTwoFivePercentConvertibleSeniorNotesDue2026


Deferred
Period End2021-06-302021-03-312020-12-31
Value6660000.06962000.07258000.0
Percentage of DeferredFinanceCostsNet0.00.0100.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value101123.8682.5723.025
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsDeferredIncome

us-gaap:DeferredTaxAssetsDeferredIncome


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1702000.01682000.0734000.0395000.0241000.0
Percentage of DeferredTaxAssetsDeferredIncome100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGoodwillAndIntangibleAssets

us-gaap:DeferredTaxAssetsGoodwillAndIntangibleAssets


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1968000.0085000.0166000.0237000.0
Percentage of DeferredTaxAssetsGoodwillAndIntangibleAssets100.00.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value7846219.09815
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value4730110.0264.249
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2207000.090000.061000.037000.059000.0
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value7270000.03710000.02690000.02071000.02369000.0
Percentage of DeferredTaxAssetsTaxCreditCarryforwards100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value9433000.02109000.03486000.04668000.06458000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value3478000.02083000.02755000.01687000.02011000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value134000.097000.057000.048000.095000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts

us-gaap:DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts


Deferred
Period End2020-12-31
Value27
Percentage of DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts100.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value989000.0855000.0729000.0582000.0654000.0
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets


Deferred
Period End2020-12-312019-12-312018-12-31
Value600.0410.0
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets100.0100.00.0

us-gaap:DeferredTaxLiabilitiesLeasingArrangements

us-gaap:DeferredTaxLiabilitiesLeasingArrangements


Deferred
Period End2020-12-312019-12-312018-12-31
Value4092000.05295000.00
Percentage of DeferredTaxLiabilitiesLeasingArrangements100.0100.00.0

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value137000.096000.0146000.0193000.0288000.0
Percentage of DeferredTaxLiabilitiesOther100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value8038000.05793000.02993000.01797000.02083000.0
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate


Defined
Period End2020-12-31
Value0.5
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate100.0

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease


Defined
Period End2020-12-31
Value1.6
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease100.0

us-gaap:DefinedBenefitPlanBenefitObligation us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanBenefitObligation

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-31
Value4064000.0
Percentage of DefinedBenefitPlanBenefitObligation100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-31
Value37000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-31
Value5000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-31
Value5000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-31
Value35000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-31
Value5000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-31
Value5000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo100.0

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-31
Value341000.0
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear100.0

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:RelatedPartyTransaction, us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets

band:InsuranceCompaniesCollective, us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-31
Value2853000.0
Percentage of DefinedBenefitPlanFairValueOfPlanAssets100.0

band:InsuranceCompaniesIndividual, us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-31
Value29000.0
Percentage of DefinedBenefitPlanFairValueOfPlanAssets1.0

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-31
Value2882000.0
Percentage of DefinedBenefitPlanFairValueOfPlanAssets101.0

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:RetirementPlanType

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-31
Value2882000.0
Percentage of DefinedBenefitPlanFairValueOfPlanAssets101.0

us-gaap:DefinedBenefitPlanFundedStatusOfPlan us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanFundedStatusOfPlan

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-31
Value-1182000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan100.0

us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsAccumulatedBenefitObligation us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsAccumulatedBenefitObligation

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-31
Value3450000.0
Percentage of DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsAccumulatedBenefitObligation100.0

us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-31
Value2882000.0
Percentage of DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets100.0

us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation

us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-31
Value4064000.0
Percentage of DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation100.0

us-gaap:DueToRelatedPartiesCurrentAndNoncurrent us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:DueToRelatedPartiesCurrentAndNoncurrent

band:RepublicWirelessInc, srt:AffiliatedEntity


Due
Period End2020-09-302019-12-31
Value10000.00
Percentage of DueToRelatedPartiesCurrentAndNoncurrent100.00.0

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value1311199.7647.7894.3788.2847.6316.2984.3377.3235.2434.1212.8095.2374.6564.373
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions


Employee
Period End2020-09-30
Value17
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions us-gaap:AwardType

us-gaap:RestrictedStockUnitsRSU


Employee
Period End2021-06-302021-03-312020-12-31
Value273118
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions0.00.00.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions


Employee
Period End2021-06-302021-03-312020-12-312020-09-30
Value38000.093000.0152000.0223000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions100.0100.0100.0100.0

us-gaap:EscrowDeposit us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:EscrowDeposit

band:LeaseAgreementRaleighNorthCarolina


Escrow
Period End2021-05-27
Value3000000.0
Percentage of EscrowDeposit100.0

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiability


Finance
Period End2021-06-302021-03-312020-12-31
Value480000.0433000.0465000.0
Percentage of FinanceLeaseLiability100.0100.0100.0

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityCurrent


Finance
Period End2021-06-302021-03-312020-12-312018-12-31
Value209000.0175000.0183000.0183000.0
Percentage of FinanceLeaseLiabilityCurrent100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityNoncurrent


Finance
Period End2021-06-302021-03-312020-12-31
Value271000.0258000.0282000.0
Percentage of FinanceLeaseLiabilityNoncurrent100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDue


Finance
Period End2021-06-302021-03-312020-12-31
Value506000.0457000.0492000.0
Percentage of FinanceLeaseLiabilityPaymentsDue100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths


Finance
Period End2021-06-302021-03-312020-12-31
Value187000.0148000.0195000.0
Percentage of FinanceLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive


Finance
Period End2020-12-31
Value4000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearFive100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour


Finance
Period End2021-06-302021-03-312020-12-31
Value11000.04000.055000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearFour100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree


Finance
Period End2021-06-302021-03-312020-12-31
Value76000.061000.092000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearThree100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo


Finance
Period End2021-06-302021-03-312020-12-31
Value112000.097000.0146000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear


Finance
Period End2021-06-302021-03-31
Value120000.0147000.0
Percentage of FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear100.0100.0

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount


Finance
Period End2021-06-302021-03-312020-12-31
Value26000.024000.027000.0
Percentage of FinanceLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseRightOfUseAsset


Finance
Period End2021-06-302021-03-312020-12-31
Value475000.0428000.0464000.0
Percentage of FinanceLeaseRightOfUseAsset100.0100.0100.0

us-gaap:FinanceLeaseRightOfUseAssetAccumulatedAmortization

us-gaap:FinanceLeaseRightOfUseAssetAccumulatedAmortization


Finance
Period End2021-06-302021-03-312020-12-312019-12-31
Value135000.074000.028000.00
Percentage of FinanceLeaseRightOfUseAssetAccumulatedAmortization100.0100.0100.00.0

us-gaap:FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization

us-gaap:FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization


Finance
Period End2021-06-302021-03-312020-12-31
Value610000.0502000.0492000.0
Percentage of FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value2116-12.2618.9148.7848.6548.5248.3948.2648.1348.0047.8747.7457.6157.457.246.611
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:BusinessAcquisition

band:Dash


Finite
Period End2021-06-302021-03-312020-12-312019-12-31
Value9.3049.1749.0448.524
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization42.854.4-73.8100.0

band:VoxboneSA


Finite
Period End2021-06-302021-03-312020-12-31
Value127.6953.217
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization57.245.6-26.2

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:BusinessAcquisition, us-gaap:FiniteLivedIntangibleAssetsByMajorClass

band:Dash, us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312019-12-31
Value5.3715.2415.1114.591
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization24.731.1-41.753.9

band:VoxboneSA, us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-31
Value6.7354.1611.739
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization30.924.7-14.2

band:VoxboneSA, us-gaap:DevelopedTechnologyRights


Finite
Period End2021-06-302021-03-312020-12-31
Value5.7223.5341.478
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization26.320.9-12.1

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


Finite
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value4.9814.8514.7214.5914.4614.3314.2014.0713.9413.8123.6823.5523.4223.032
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization55.955.254.653.953.152.451.650.950.149.248.447.747.345.9

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive


Finite
Period End2020-12-31
Value148
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value1918190.52
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear


Finite
Period End2021-06-302021-03-312020-09-30
Value9.603140.13
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive


Finite
Period End2020-12-31
Value19
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value1918190.52
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value1918190.52
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value1918190.52
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:BusinessAcquisition, us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsGross

band:VoxboneSA, us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-31
Value151149156
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0

band:VoxboneSA, us-gaap:DevelopedTechnologyRights


Finite
Period End2021-06-302021-03-312020-12-31
Value858488
Percentage of FiniteLivedIntangibleAssetsGross56.656.656.6

us-gaap:HostingArrangementServiceContractImplementationCostCapitalizedBeforeAccumulatedAmortization

us-gaap:HostingArrangementServiceContractImplementationCostCapitalizedBeforeAccumulatedAmortization


Hosting
Period End2021-06-302021-03-31
Value499000.0533000.0
Percentage of HostingArrangementServiceContractImplementationCostCapitalizedBeforeAccumulatedAmortization100.0100.0

us-gaap:HostingArrangementServiceContractImplementationCostCapitalizedBeforeAccumulatedAmortization us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:AccountingStandardsUpdate201815


Hosting
Period End2020-12-312020-09-302020-06-302020-03-31
Value572000.0566000.0432000.0272000.0
Percentage of HostingArrangementServiceContractImplementationCostCapitalizedBeforeAccumulatedAmortization0.00.00.00.0

us-gaap:HostingArrangementServiceContractImplementationCostCapitalizedBeforeAccumulatedAmortization us-gaap:BalanceSheetLocation

us-gaap:OtherNoncurrentAssets


Hosting
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value359000.0393000.0429000.0430000.0328000.0214000.0
Percentage of HostingArrangementServiceContractImplementationCostCapitalizedBeforeAccumulatedAmortization71.973.70.00.00.00.0

us-gaap:PrepaidExpensesAndOtherCurrentAssets


Hosting
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value140000.0140000.0144000.0136000.0104000.058000.0
Percentage of HostingArrangementServiceContractImplementationCostCapitalizedBeforeAccumulatedAmortization28.126.30.00.00.00.0

us-gaap:IntangibleAssetsGrossExcludingGoodwill

us-gaap:IntangibleAssetsGrossExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value2522492601515151515151515151515151515
Percentage of IntangibleAssetsGrossExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntangibleAssetsGrossExcludingGoodwill us-gaap:BusinessAcquisition

band:VoxboneSA


Intangible
Period End2021-06-302021-03-312020-12-31
Value237234245
Percentage of IntangibleAssetsGrossExcludingGoodwill94.094.094.2

us-gaap:InvestmentsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:InvestmentsFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, us-gaap:BankTimeDeposits


Investments
Period End2021-03-312020-12-312020-09-302020-06-30
Value10.040230230
Percentage of InvestmentsFairValueDisclosure100.0100.0100.0100.0

us-gaap:InvestmentsFairValueDisclosure us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:FairValueMeasurementsRecurring, us-gaap:BankTimeDeposits


Investments
Period End2021-03-312020-12-312020-09-302020-06-30
Value10.040230230
Percentage of InvestmentsFairValueDisclosure100.0100.0100.0100.0

us-gaap:LeaseIncentivePayableCurrentAndNoncurrent us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:LeaseIncentivePayableCurrentAndNoncurrent

band:UndevelopedLandRaleighNorthCarolina


Lease
Period End2021-06-05
Value3193000.0
Percentage of LeaseIncentivePayableCurrentAndNoncurrent100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value6850000.06736000.06408000.06587000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear


Lessee
Period End2021-06-302021-03-312020-09-30
Value3211000.04756000.01083000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear100.0100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceived

us-gaap:LessorOperatingLeasePaymentsToBeReceived


Lessor
Period End2021-06-302021-03-312020-12-312020-09-30
Value479000.0594000.0706000.0819000.0
Percentage of LessorOperatingLeasePaymentsToBeReceived100.0100.0100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths

us-gaap:LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths


Lessor
Period End2021-06-302021-03-312020-12-312020-09-30
Value249000.0249000.0457000.0457000.0
Percentage of LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths100.0100.0100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear

us-gaap:LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear


Lessor
Period End2021-06-302021-03-312020-09-30
Value230000.0345000.0113000.0
Percentage of LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear100.0100.0100.0

us-gaap:LongTermDebtFairValue us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LongTermDebtFairValue

band:ZeroPointFiveZeroPercentConvertibleSeniorNotesDue2028, us-gaap:ConvertibleDebt


Long
Period End2021-06-302021-03-31
Value257245
Percentage of LongTermDebtFairValue100.0100.0

band:ZeroPointTwoFivePercentConvertibleSeniorNotesDue2026, us-gaap:ConvertibleDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-30
Value650609716798
Percentage of LongTermDebtFairValue253.2248.60.00.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value4.784.814.814.990.04990.04994.984.980.050.0511
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasesFutureMinimumPaymentsDue us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:StatementScenario

us-gaap:OperatingLeasesFutureMinimumPaymentsDue

band:LeaseAgreementRaleighNorthCarolina, us-gaap:ScenarioPlan


Operating
Period End2021-05-27
Value495
Percentage of OperatingLeasesFutureMinimumPaymentsDue100.0

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:OperatingLossCarryforwards

us-gaap:FederalMinistryOfFinanceGermany


Operating
Period End2020-12-31
Value187
Percentage of OperatingLossCarryforwards100.0

us-gaap:StateAndLocalJurisdiction


Operating
Period End2020-12-312019-12-312018-12-31
Value1257936
Percentage of OperatingLossCarryforwards66.90.00.0

us-gaap:TaxAndCustomsAdministrationNetherlands


Operating
Period End2020-12-31
Value5.263
Percentage of OperatingLossCarryforwards2.8

us-gaap:OtherCommitmentDueInNextTwelveMonths

us-gaap:OtherCommitmentDueInNextTwelveMonths


Other
Period End2020-08-01
Value600000.0
Percentage of OtherCommitmentDueInNextTwelveMonths100.0

us-gaap:OtherCommitmentDueInSecondYear

us-gaap:OtherCommitmentDueInSecondYear


Other
Period End2020-08-01
Value300000.0
Percentage of OtherCommitmentDueInSecondYear100.0

us-gaap:OtherInvestments

us-gaap:OtherInvestments


Other
Period End2021-03-312020-12-312020-09-302020-06-302019-12-31
Value10.0402302300.0
Percentage of OtherInvestments100.0100.0100.0100.00.0

us-gaap:OtherReceivablesNetCurrent

us-gaap:OtherReceivablesNetCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value716000.01595000.02250000.0577000.0596000.0614000.064000.0400000.0181000.0126000.0121000.0361000.0308000.0357000.0343000.0532000.0307000.0
Percentage of OtherReceivablesNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent us-gaap:BalanceSheetLocation, us-gaap:RetirementPlanSponsorLocation, us-gaap:RetirementPlanType

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent

us-gaap:OtherLiabilities, us-gaap:ForeignPlan, us-gaap:PensionPlansDefinedBenefit


Pension
Period End2020-12-31
Value1182000.0
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent100.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization


Property
Period End2021-06-302021-03-312020-12-312019-12-31
Value54504634
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization100.0100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization


Property
Period End2021-06-302021-03-312020-12-312019-12-31
Value66505141
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization100.0100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization


Property
Period End2021-06-302021-03-312020-12-312019-12-31
Value1201009776
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization100.0100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization us-gaap:PropertyPlantAndEquipmentByType

band:ComputerAndOfficeEquipment


Property
Period End2021-06-302021-03-312020-12-31
Value4.6054.194.077
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization3.84.24.2

band:ComputerandOfficeEquipment


Property
Period End2020-12-312019-12-31
Value4.0774.627
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization4.26.0

band:TelecommunicationsEquipment


Property
Period End2021-06-302021-03-312020-12-312019-12-31
Value64616044
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization53.461.262.157.9

us-gaap:Automobiles


Property
Period End2021-06-302021-03-312020-12-312019-12-31
Value0.620.5120.5020.01
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization0.50.50.50.0

us-gaap:FurnitureAndFixtures


Property
Period End2021-06-302021-03-312020-12-312019-12-31
Value2.182.3482.3412.373
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization1.82.32.43.1

us-gaap:Land


Property
Period End2021-06-30
Value15
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization13.0

us-gaap:LeaseholdImprovements


Property
Period End2021-06-302021-03-312020-12-312019-12-31
Value6.2626.286.2855.263
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization5.26.26.46.9

us-gaap:SoftwareAndSoftwareDevelopmentCosts


Property
Period End2021-06-302021-03-312020-12-312019-12-31
Value4.7554.8773.9012.018
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization3.94.84.02.6

us-gaap:SoftwareDevelopment


Property
Period End2021-06-302021-03-312020-12-312019-12-31
Value22201917
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization18.320.720.423.4

us-gaap:RestrictedCashAndCashEquivalents

us-gaap:RestrictedCashAndCashEquivalents


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value9.4069.5279.2741.1440.93250.590.24
Percentage of RestrictedCashAndCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueRemainingPerformanceObligation

us-gaap:RevenueRemainingPerformanceObligation


Revenue
Period End2020-12-31
Value6515000.0
Percentage of RevenueRemainingPerformanceObligation100.0

us-gaap:SalesAndExciseTaxPayableCurrent

us-gaap:SalesAndExciseTaxPayableCurrent


Sales
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value9439000.09114000.09142000.05922000.05633000.05006000.05439000.05201000.05238000.05074000.04742000.03102000.03525000.03146000.03030000.02325000.02769000.0
Percentage of SalesAndExciseTaxPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SecurityDeposit us-gaap:CounterpartyName, us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:SecurityDeposit

band:USEFEdwardsMillOwnerLLC, band:LeaseAgreementRaleighNorthCarolina


Security
Period End2021-05-27
Value2500000.0
Percentage of SecurityDeposit100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value81.7582.3351.5846.7347.1547.7235.2235.2635.0333.8426.9526.4426.0325.720
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value242236443648474965796492789459
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-312020-09-30
Value21203236
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-312020-09-30
Value9.08.959.999.8
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-312020-09-30
Value24223644
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-312020-09-30
Value10.1510.1610.8210.81
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0

us-gaap:TaxCreditCarryforwardAmount

us-gaap:TaxCreditCarryforwardAmount


Tax
Period End2020-12-31
Value9653000.0
Percentage of TaxCreditCarryforwardAmount100.0

us-gaap:UnbilledReceivablesCurrent

us-gaap:UnbilledReceivablesCurrent


Unbilled
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value31282725222016161413111110108.6537.8597.368
Percentage of UnbilledReceivablesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary


Unrecorded
Period End2021-06-302021-03-312020-12-312020-09-30
Value108.5198.4285.068
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary100.0100.0100.0100.0

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount


Unrecorded
Period End2021-06-302021-03-312020-12-312020-09-30
Value1614139.473
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount100.0100.0100.0100.0

Line plots across dimensions of each concept


us-gaap:CommonStockValue
us-gaap:StatementClassOfStock
(None,)
Common Stock Valueus-gaap: Statement Class Of Stock
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
(None,)
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amountus-gaap: Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities
COGS Ratio
us-gaap:StatementBusinessSegments
(None,)
C O G S  Ratious-gaap: Statement Business Segments
Gross Margin
us-gaap:StatementBusinessSegments
(None,)
Gross  Marginus-gaap: Statement Business Segments
TTM Greenblatt ROC
_
(None,)
T T M  Greenblatt  R O C_
us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:IncomeStatementLocation
(None,)
Allocated Share Based Compensation Expenseus-gaap: Income Statement Location
us-gaap:CostOfGoodsAndServicesSold
us-gaap:StatementBusinessSegments
(None,)
Cost Of Goods And Services Soldus-gaap: Statement Business Segments
us-gaap:GrossProfit
us-gaap:StatementBusinessSegments
(None,)
Gross Profitus-gaap: Statement Business Segments
us-gaap:InterestExpenseDebt
us-gaap:DebtInstrument
(None,)
Interest Expense Debtus-gaap: Debt Instrument
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService
(None,)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:StatementBusinessSegments
(None,)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Statement Business Segments
us-gaap:StockholdersEquity
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
(None, 'us-gaap:CommonStock')
Stockholders Equityus-gaap: Statement Class Of Stock, us-gaap: Statement Equity Components
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType
(None,)
Property Plant And Equipment Grossus-gaap: Property Plant And Equipment By Type
us-gaap:IntangibleAssetsNetExcludingGoodwill
us-gaap:BusinessAcquisition
(None,)
Intangible Assets Net Excluding Goodwillus-gaap: Business Acquisition
us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:BusinessAcquisition, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
('band:VoxboneSA', None)
Finite Lived Intangible Assets Netus-gaap: Business Acquisition, us-gaap: Finite Lived Intangible Assets By Major Class
us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:BusinessAcquisition, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
(None, 'us-gaap:CustomerRelationships')
Finite Lived Intangible Assets Netus-gaap: Business Acquisition, us-gaap: Finite Lived Intangible Assets By Major Class
us-gaap:LongTermDebt
us-gaap:DebtInstrument
(None,)
Long Term Debtus-gaap: Debt Instrument
us-gaap:StockholdersEquity
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
(None, 'us-gaap:CommonStock')
Stockholders Equityus-gaap: Statement Class Of Stock, us-gaap: Statement Equity Components
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:CommonStockValue
us-gaap:StatementClassOfStock
(None,)
Common Stock Valueus-gaap: Statement Class Of Stock
us-gaap:AmortizationOfFinancingCosts
us-gaap:DebtInstrument
(None,)
Amortization Of Financing Costsus-gaap: Debt Instrument