ALRM


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

Table of contents



us-gaap:CommonStockValue
us-gaap:StatementEquityComponents
us-gaap:SharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:AwardType
us-gaap:IncomeStatementLocation

us-gaap:CostOfGoodsAndServicesSold
us-gaap:ProductOrService

us-gaap:GainsLossesOnExtinguishmentOfDebt
us-gaap:CreditFacility, us-gaap:DebtInstrument

us-gaap:GeneralAndAdministrativeExpense

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit
us-gaap:DebtInstrument
us-gaap:InterestExpenseDebt

us-gaap:InterestExpenseLongTermDebt

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:OperatingExpenses

us-gaap:OperatingIncomeLoss
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:ProfitLoss

us-gaap:ResearchAndDevelopmentExpense

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyType, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ProductOrService
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

us-gaap:SellingAndMarketingExpense

us-gaap:Assets
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:AccountsReceivableNetCurrent

us-gaap:InventoryNet

us-gaap:OtherAssetsCurrent

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AmortizationOfIntangibleAssets
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:Goodwill
us-gaap:BusinessAcquisition
us-gaap:StatementBusinessSegments

us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:BalanceSheetLocation, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:AccruedLiabilitiesCurrent

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:LiabilitiesCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherLiabilitiesCurrent
us-gaap:DebtInstrument
us-gaap:LongTermDebt

us-gaap:LongTermDebtNoncurrent

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:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:TreasuryStockValue

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:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInInventories

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ProfitLoss

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment
us-gaap:StatementBusinessSegments

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsForRepurchaseOfCommonStock
us-gaap:AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyType, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:SubsequentEventType
us-gaap:DebtInstrumentInterestRateStatedPercentage

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
us-gaap:BusinessAcquisition

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance

alrm:AccountsAndNotesReceivableCreditLossExpenseReversal

alrm:AccountsReceivableCreditLossExpenseReversalLessThanAmount

alrm:AdjustmentsToAdditionalPaidInCapitalAccretionAdjustmentsOfRedeemableNoncontrollingInterestToRedemptionValue
us-gaap:StatementEquityComponents

alrm:ContractWithCustomerAssetCommissionCostsandUpfrontPaymentsToACustomerCapitalizedDuringPeriod

alrm:ContractWithCustomerLiabilityRevenueDeferredDuringPeriod

alrm:ContractWithCustomerProvisionForProductReturns
us-gaap:IncomeStatementLocation
alrm:VariableRateComponent, us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:VariableRate
alrm:DebtInstrumentInterestRateTermsLeverageRatio
alrm:VariableRateComponent, us-gaap:Range, us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:VariableRate
us-gaap:ConsolidatedEntities, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementClassOfStock
alrm:EquitySecuritiesWithoutReadilyDeterminableFairValueGainLossOnSale

alrm:IncreaseDecreaseInOperatingLeaseLiabilities

alrm:IncreaseDecreaseinAccountsPayableAccruedLiabilitiesandOtherCurrentLiabilities
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
alrm:LineofCreditFacilityCovenantTermsFixedChargeCoverageRatioMinimum

alrm:OperatingLeaseRightOfUseAssetAmortization
us-gaap:BusinessAcquisition
alrm:PaymentstoAcquireBusinessesNetOfWorkingCapitalAdjustment

us-gaap:AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt
us-gaap:StatementEquityComponents
us-gaap:ConsolidatedEntities
us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs
us-gaap:CounterpartyName
us-gaap:DebtInstrument
us-gaap:AmortizationOfDebtDiscountPremium

us-gaap:AmortizationOfFinancingCostsAndDiscounts
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationConsiderationTransferred1

us-gaap:BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred

us-gaap:CapitalizedContractCostAmortization
us-gaap:CapitalizedContractCost
us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType, us-gaap:StatementBusinessSegments
us-gaap:ConcentrationRiskPercentage1
us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
us-gaap:MajorCustomers, us-gaap:Range, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:CostOfGoodsAndServicesSoldAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:IncomeStatementLocation
us-gaap:DebtInstrument
us-gaap:DebtInstrumentConvertibleConversionRatio1
us-gaap:DebtInstrument, us-gaap:SubsequentEventType

us-gaap:DepreciationAndAmortization
us-gaap:StatementBusinessSegments

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
us-gaap:FairValueByLiabilityClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FinitelivedIntangibleAssetsAcquired1
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:SubsequentEventType

us-gaap:GainOnSaleOfInvestments
us-gaap:BusinessAcquisition
us-gaap:GoodwillAcquiredDuringPeriod
us-gaap:BusinessAcquisition
us-gaap:GoodwillPurchaseAccountingAdjustments

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInOtherNoncurrentLiabilities

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:InterestIncomeOther

us-gaap:InventoryWriteDown
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityInterestRateDuringPeriod

us-gaap:NetIncomeLossAttributableToRedeemableNoncontrollingInterest

us-gaap:OperatingLeaseCost
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:OperatingLeaseExpense

us-gaap:OperatingLeasePayments

us-gaap:PaymentForContingentConsiderationLiabilityFinancingActivities

us-gaap:PaymentsOfDebtIssuanceCosts
us-gaap:BusinessAcquisition
us-gaap:PaymentsToAcquireBusinessesGross

us-gaap:PaymentsToAcquireInProcessResearchAndDevelopment

us-gaap:PaymentsToAcquireIntangibleAssets

us-gaap:PaymentsToAcquireNotesReceivable
us-gaap:AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyType, us-gaap:SubsequentEventType

us-gaap:PaymentsToAcquireProjects
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:SubsequentEventType

us-gaap:ProceedsFromCollectionOfNotesReceivable

us-gaap:ProceedsFromIssuanceOfSecuredDebt
us-gaap:DebtInstrument
us-gaap:DebtInstrument, us-gaap:SubsequentEventType

us-gaap:ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions

us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProceedsFromSaleOfInvestmentProjects
us-gaap:ConsolidatedEntities, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementClassOfStock

us-gaap:ProvisionForDoubtfulAccounts
us-gaap:ConsolidatedEntities

us-gaap:ProvisionForLoanLossesExpensed
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:IncomeStatementLocation, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty

us-gaap:RepaymentsOfLinesOfCredit
us-gaap:CreditFacility, us-gaap:DebtInstrument

us-gaap:ResearchAndDevelopmentInProcess
us-gaap:AssetAcquisition

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:TemporaryEquityAccretionToRedemptionValueAdjustment

us-gaap:TemporaryEquityNetIncome
us-gaap:TaxCreditCarryforward
us-gaap:UnrecognizedTaxBenefitsPeriodIncreaseDecrease

alrm:AccountsPayableAccruedLiabilitiesandOtherCurrentLiabilitiesCurrent

alrm:AllowanceforProductReturnsCurrent

alrm:BusinessCombinationConsiderationTransferredHoldbackAmount
us-gaap:BusinessAcquisition
alrm:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOperatingLease
us-gaap:BusinessAcquisition
alrm:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOperatingLease
us-gaap:BusinessAcquisition
alrm:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseRightOfUseAssets
us-gaap:BusinessAcquisition
alrm:BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentLiabilitiesAccruedCompensation
us-gaap:DebtInstrument
alrm:DebtIssuanceCostsGrossLiabilityComponent
us-gaap:DebtInstrument
alrm:DebtIssuanceCostsGrossLiabilityComponentAmortizedAndUnamortized

alrm:DeferredTaxAssetsDepreciation

alrm:DeferredTaxAssetsOperatingLeaseLiabilities

alrm:DeferredTaxAssetsTaxDeferredExpenseBusinessCombinationCosts

alrm:DeferredTaxAssetsTaxDeferredExpenseSubsidiaryUnitCompensation

alrm:DeferredTaxLiabilitiesContingentConsideration
us-gaap:DebtInstrument
alrm:DeferredTaxLiabilitiesDeferredExpenseDebtDiscountAndDebtIssuanceCosts

alrm:DeferredTaxLiabilitiesInternallyDevelopedSoftware

alrm:DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets

alrm:FinancingReceivableAmortizedCostNonaccrual
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

alrm:LesseeOperatingLeaseLeaseNotYetCommencedMinimumLeasePayments

alrm:LesseeOperatingLeaseLiabilityToBePaidAfterYearFour

alrm:LesseeOperatingLeaseOptionToExtendAmount
us-gaap:AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyType, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
alrm:NotesReceivableMaximumAvailable
us-gaap:AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyType, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:SubsequentEventType

alrm:OperatingLeaseAvailableLeaseholdImprovementAllowance

alrm:OtherAssetsAllowanceForCreditLoss

alrm:OtherAssetsAllowanceForCreditLossCurrent
us-gaap:AwardType
alrm:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestAggregateIntrinsicValue
us-gaap:AwardType
alrm:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestWeightedAverageGrantDateFairValue

alrm:TrustedServiceProviders

us-gaap:AccountsReceivableGrossCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivable
us-gaap:ConsolidatedEntities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency
us-gaap:BusinessAcquisition, us-gaap:FairValueByMeasurementFrequency
us-gaap:BusinessCombinationContingentConsiderationLiability
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency
us-gaap:MeasurementInputType
us-gaap:BusinessCombinationContingentConsiderationLiabilityMeasurementInput
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable
us-gaap:BusinessAcquisition, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
us-gaap:CashAndCashEquivalents, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:CashAndCashEquivalentsFairValueDisclosure
us-gaap:CashAndCashEquivalents, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency
us-gaap:CashAndCashEquivalents
us-gaap:CashEquivalentsAtCarryingValue

us-gaap:ContractWithCustomerAssetNet

us-gaap:ContractWithCustomerLiability
us-gaap:DeferredRevenueArrangementType

us-gaap:ContractWithCustomerLiabilityNoncurrent
us-gaap:DebtInstrument
us-gaap:DebtInstrumentConvertibleConversionPrice1
us-gaap:DebtInstrument, us-gaap:SubsequentEventType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentFairValue
us-gaap:DebtInstrument
us-gaap:DebtInstrumentUnamortizedDiscount
us-gaap:DebtInstrument
us-gaap:DeferredFinanceCostsGross
us-gaap:DebtInstrument, us-gaap:SubsequentEventType

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsDeferredIncome

us-gaap:DeferredTaxAssetsEquityMethodInvestments

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsInventory

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts

us-gaap:DeferredTaxLiabilitiesDeferredExpense

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:EmployeeRelatedLiabilitiesCurrent
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentOwnershipPercentage
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquitySecuritiesWithoutReadilyDeterminableFairValueAmount
us-gaap:FairValueByLiabilityClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:FinancingReceivableAllowanceForCreditLosses
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:FinancingReceivableOriginatedInCurrentFiscalYear
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:BusinessAcquisition
us-gaap:GoodwillImpairedAccumulatedImpairmentLoss

us-gaap:InventoryFinishedGoodsNetOfReserves

us-gaap:InventoryRawMaterialsNetOfReserves

us-gaap:LesseeOperatingLeaseDiscountRate

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:LiabilitiesFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LineOfCredit
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:LongTermLineOfCredit
us-gaap:AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyType, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:NotesAndLoansReceivableGrossNoncurrent
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyType, us-gaap:BalanceSheetLocation
us-gaap:NotesAndLoansReceivableNetNoncurrent
us-gaap:AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyType, us-gaap:BalanceSheetLocation, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:NotesReceivableGross
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:IncomeTaxAuthority
us-gaap:OperatingLossCarryforwards

us-gaap:OtherAccruedLiabilitiesNoncurrent

us-gaap:PrepaidExpenseCurrentAndNoncurrent

us-gaap:RedeemableNoncontrollingInterestEquityCarryingAmount

us-gaap:SeniorLongTermNotes
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
us-gaap:BusinessAcquisition

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue
us-gaap:BusinessAcquisition

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice
us-gaap:BusinessAcquisition

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue
us-gaap:BusinessAcquisition

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice
us-gaap:BusinessAcquisition

us-gaap:SharePrice
us-gaap:AwardType
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding
us-gaap:IncomeTaxAuthority, us-gaap:TaxCreditCarryforward
us-gaap:TaxCreditCarryforwardAmount

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
us-gaap:ValuationAllowancesAndReservesType
us-gaap:ValuationAllowancesAndReservesBalance

Plots across concepts


IncomeStatement
Income Loss From Continuing Operations 
Before Income Taxes Extraordinary Items Noncontrolling Interest
Expenses
Income Tax Expense Benefit
Balance Sheet
Operating Lease Right Of Use Asset
Assets
Operating Lease Right Of Use Asset
Current Assets
Other Assets Current
NonCurrent Assets
Deferred Income Tax Assets Net
PropertyPlantAndEquipmentNet
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Liabilities
Operating Lease Liability
Current Liabilities
Other Liabilities Current
Noncurrent Liabilities
Other Liabilities Noncurrent
Stockholders Equity
Common Stock Value
CashFlow
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInOperatingActivities
Inventory Write Down
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Weighted Average Number Of Shares Outstanding Basic
OperatingLeaseLiability
Operating Lease Liability Current
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Undiscounted Excess Amount
FiniteLivedIntangibleAssets
Finite Lived Intangible Assets Accumulated Amortization
InventoryNet
Inventory Raw Materials Net Of Reserves
AccountsReceivable
Accounts Receivable Net Current

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
us-gaap:CommonStockValue █████████████████▇▇▇▇▇▇▇▁0.50.4980.4960.4930.4910.4880.4870.4860.4850.4820.4810.480.4770.4730.4720.4710.4670.4630.4610.4590.4560.4560.4550.4540.028NA0.026NANA
 us-gaap:SharesOutstanding us-gaap:StatementEquityComponents us-gaap:CommonStock██▇▇▆▆▆▆▅▅▅▅▄▃▃▃▂▂▁▁50.04149.80449.63149.25649.07148.80848.70148.57248.48148.24948.10248.047.69247.29147.20247.1346.68546.28346.14245.898NANA45.485NANANA2.614NANA
 us-gaap:SharesOutstanding us-gaap:StatementEquityComponents us-gaap:TreasuryStock████▁▁▄0.1470.1470.1470.147-0.147-0.1470.0NANANANANANANANANANANANANANANANANANANANANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁51.75439251.739461NA50.97967950.55163250.246987NA50.15280750.2839950.172818NA47.81264249.49708849.268255NA49.25970149.00055348.758774NA48.31995247.52318747.303896NA46.8320142.7063694.172787NA4.3456853.71844
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁49.80896949.561887NA49.00734348.7922848.725565NA48.51804148.38869648.172243NA47.81264247.43931147.226382NA46.88634546.44232746.225473NA45.71696145.60206145.526058NA44.922412.7063692.636813NA2.4294452.32882
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities us-gaap:EmployeeStockOption0.1337NANA0.1364340.3600320.272876NA0.1877920.1483930.046693NA0.1911690.191050.231951NA0.1891170.313650.13375NA0.112350.119750.514122NA0.0320.5073750.1165NA0.185150.102
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities us-gaap:RestrictedStockUnitsRSU█▁0.1492910.125191NA0.0271990.0129650.197478NA0.3251080.013550.18135NA0.03310.0127720.1501NA0.00.00.0NA0.025640.0NANA0.0NANANANANA
us-gaap:EarningsPerShareBasic █████▇███▇▇▇▇▇▇█▇▇▇▇▇▇▇▇▁▇▇▇▇0.30.30.320.740.350.180.270.360.290.190.16-0.160.230.220.010.320.210.090.060.060.040.060.070.07-6.090.060.079999999999999990.050.04
us-gaap:EarningsPerShareDiluted █████▇███▇▇▇▇▇▇█▇▇▇▇▇▇▇▇▁▇▇▇▇0.280.290.310.710.340.180.260.350.270.180.16-0.160.220.210.010.310.20.080.060.050.040.060.070.07-6.090.040.040000000000000010.030.02
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
 COGS Ratio us-gaap:ProductOrService alrm:HardwareandOtherRevenue█▇▆▆▄▆▅▄▃▂▂▃▂▁▁▂▁75.67165.11560.09958.72545.93359.98950.42642.95639.32632.2833.57837.55633.5224.76823.58828.03827.06NANANANANANANANANANANANA
 COGS Ratio us-gaap:ProductOrService us-gaap:LicenseAndService█▇▇▆▆▅▅▄▄▄▃▃▃▂▂▁▁113.186107.383105.477100.12695.70491.9590.06284.92482.33480.05577.82474.29270.96867.98865.20561.92458.928NANANANANANANANANANANANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,alrm:Alarm.Com█▇▇▇▆▆▆▅▅▄▄▄▄▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁▁179.511165.532157.673150.56133.469144.94132.502120.97114.625105.749104.367105.52698.67888.66382.89185.28781.33870.51265.57664.4261.77556.0154.4552.68450.75344.86544.65542.27442.147
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
 TTM Greenblatt ROC _ _█▇▇█▇▆▇▇▇▆▆▁▆▇▇▆▆▅▅▅▅▅▅▅▅▅16.72515.00313.38118.05614.9949.86714.95212.19514.0459.2218.393-16.6948.5111.99312.59210.4015.8964.4854.1542.8352.8084.2614.2474.3414.2775.126NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
us-gaap:AllocatedShareBasedCompensationExpense █▆▇▆▆▅▅▄▅▄▃▃▃▃▂▂▂▂▁▁▁▁▁▁▂▁▁▁▁10.0567.8888.2997.4487.0956.3585.8795.0355.424.2663.733.4573.5442.6692.2791.9061.9151.3131.1211.0860.9420.8521.1250.8091.6050.5610.9020.7460.831
us-gaap:CostOfGoodsAndServicesSold █▇▆▆▅▆▅▅▄▄▄▄▃▂▂▃▃▂▂▂▂▁▁▁▁▁▁▁▁77.36765.76259.2661.18349.00557.9852.5747.52344.55638.9538.85841.99236.48828.37727.88531.83329.83526.63526.71526.36625.18321.11620.10919.96920.48716.80917.60717.54818.023
us-gaap:GainsLossesOnExtinguishmentOfDebt █▁0.0-0.185NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:CreditFacility,us-gaap:DebtInstrument us-gaap:RevolvingCreditFacility,alrm:TwoThousandSeventeenFacility█▁0.0-0.2NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:GeneralAndAdministrativeExpense ▄▄▄▃▃▄▃▃▂▃▃█▃▃▂▂▂▃▃▃▂▂▂▂▁▁▁▁▁23.26822.88223.00917.4117.35920.86518.17418.70113.87219.21217.80743.66218.11916.16213.59712.97413.4515.37515.80214.80414.19113.1299.9579.9328.5147.076.9386.7467.209
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▄▄▅█▅▄▅▅▅▄▄▁▄▄▄▄▄▄▃▃▃▃▃▃▃▄▄▃▃12.75211.63713.66842.37114.3489.77314.97220.56314.1099.2528.516-16.7138.17911.71712.29110.0855.3594.5064.2762.9252.8494.3313.9114.294.1735.0916.5833.1593.507
us-gaap:IncomeTaxExpenseBenefit ▃▃▃▆▃▄▅▅▄▄▄▁▃▄█▂▃▄▄▄▄▅▄▄▅▅▅▄▄-1.738-2.913-1.9716.546-2.2771.2022.1382.8730.3130.2420.588-9.061-2.5541.20211.971-5.018-4.5060.5431.30.3580.9761.5930.9221.0611.6642.052.0970.4921.431
 us-gaap:InterestExpenseDebt us-gaap:DebtInstrument alrm:ConvertibleSeniorNotesDue2026█▁4.1493.244NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InterestExpenseLongTermDebt █▇▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁4.1543.3680.5270.5560.8680.6450.6520.7150.7860.8210.7590.7360.7510.6720.6510.6580.6740.2160.0530.0490.0470.0410.050.0440.0420.0420.0430.040.055
us-gaap:NetIncomeLoss ▅▅▅█▅▄▄▅▄▄▃▁▄▄▂▅▄▃▃▃▃▃▃▃▃▃▃▃▃14.74514.8315.96736.08416.9958.80713.03517.6913.7969.017.928-7.65210.73310.5150.3215.1039.8653.9632.9762.5671.8732.7383.2753.2292.5093.0414.4862.6672.076
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ▁█14.74514.83NANA16.9958.80713.03517.6913.7969.017.928-7.65210.73210.5120.32115.0979.863.9612.9642.5671.8732.7383.2673.179-16.4780.1460.1980.1180.088
us-gaap:OperatingExpenses ███▇▆▇▆▅▅▅▅▇▅▄▄▄▄▃▃▃▃▂▂▂▂▁▁▁▁94.76591.73392.93579.61277.63884.09272.96668.16263.05964.16464.15186.5559.4952.38648.31647.72850.25743.07438.92538.64536.43233.66632.56529.69727.18524.07620.90322.00520.493
us-gaap:OperatingIncomeLoss █▇▇█▇▆▇▇▇▆▆▁▆▇▇▆▆▅▅▅▅▅▅▅▅▅▆▅▅16.72515.00313.38118.05614.9949.86714.95212.19514.0459.2218.393-16.6948.5111.99312.59210.4015.8964.4854.1542.8352.8084.2614.2474.3414.2775.1267.0413.2793.562
us-gaap:OtherNonoperatingIncomeExpense ▁▁▁█▁▁▁▃▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁0.032-0.1550.67824.7530.0650.0920.0676.380.850.8520.8820.7170.420.3960.350.3420.1370.2370.1750.1390.0880.111-0.286-0.007-0.0620.007-0.415-0.080.0
us-gaap:ProfitLoss ▃▃▃█▃▁▂▃▂▁14.4914.5515.63935.82516.6258.57112.83417.6913.7969.01NANANANANANANANANANANANANANANANANANANA
us-gaap:ResearchAndDevelopmentExpense ██▇▇▇▇▆▅▅▅▄▄▄▄▃▄▄▃▂▂▂▂▂▂▂▁▁▁▁43.49142.46738.86736.91436.63639.7330.06829.46128.41826.49624.43722.86921.52120.37718.91519.25720.06214.52112.04811.47710.7779.9713.3359.8369.0797.7526.7256.0945.764
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax █▇▇▇▆▆▆▅▅▄▄▄▄▃▃▃▃▃▂▂▂▂▂▂▁▁▁▁▁188.857172.498165.576158.851141.637151.939140.488127.88121.66112.335111.402111.848104.48892.75688.79389.96285.98874.19469.79467.84664.42359.04356.92154.00751.94946.01145.55142.83242.078
us-gaap:SellingAndMarketingExpense ▇▆█▆▅▅▆▄▅▄▅▄▄▃▃▃▃▃▂▃▃▂▂▂▂▂▁▂▁20.52918.99923.56218.4116.9217.07518.42314.53315.63113.22816.3414.12814.61210.82210.85110.42611.89910.3149.44810.7059.8518.9767.8358.4258.0647.9165.9638.1076.67
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
us-gaap:Assets ██▅▅▅▄▄▄▄▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▁1156.7911114.545731.687698.045662.645624.075557.799501.006505.421479.902440.985427.36402.796380.043371.641374.658356.241335.64261.245250.348241.93235.868226.095223.125119.222NA120.932NANA
us-gaap:Liabilities ██▄▄▄▄▃▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁▁▁▁571.982555.16253.244248.618258.676246.885190.938164.84192.993187.406163.396162.619136.598129.785138.814144.744144.955137.23369.99666.04864.34861.4255.96457.32151.061NA40.32NANA
us-gaap:LiabilitiesAndStockholdersEquity ██▅▅▅▄▄▄▄▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▁1156.7911114.545731.687698.045662.645624.075557.799501.006505.421479.902440.985427.36402.796380.043371.641374.658356.241335.64261.245250.348241.93235.868226.095223.125119.222NA120.932NANA
us-gaap:StockholdersEquity ██▇▇▆▆▆▆▅▅▅▅▅▅▅▅▄▄▄▄▄▄▄▄▁573.437548.501467.752438.716393.253366.216355.651336.166312.428292.496277.589264.741266.198250.258232.827229.914211.286198.407191.249184.3177.582174.448170.131165.804-134.295NA-121.844NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
us-gaap:AssetsCurrent ██▄▄▄▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▁837.791795.778397.414387.112348.089309.301243.674263.693268.491240.581228.063213.474193.911174.164163.936155.235137.196119.259190.184183.549177.6171.552161.05166.31660.228NA71.844NANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ██▄▃▃▃▂▃▂▂▂▂▂▂▂▂▂▁▂▂▂▂▂▂▁▁▁▁▁662.682642.172253.459247.176205.827171.732119.629164.323150.851122.442146.061124.243105.95996.79896.32984.6468.91663.15140.634135.05134.164135.845128.358126.60120.88339.18942.57233.08438.213
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ██▃▃▂▂▁▂▂▁▂▁▁▁▁662.682642.172253.459247.176205.827171.732119.629164.323150.851122.442146.061124.243105.95996.79896.329NANANA140.634NANANANANANANANANANA
us-gaap:AccountsReceivableNetCurrent ██▇▇▆▇▆▅▅▄▄▄▄▃▃▃▃▃▂▂▂▁▁▁▁92.61288.40683.32681.88376.59181.89476.37364.89760.02156.12349.5155.46152.55343.63440.63441.20141.98638.88929.8128.73427.50223.53221.34821.74623.568NA17.259NANA
us-gaap:InventoryNet █▆▆▅▇▅▅▃▃▄▃▂▂▂▂▂▁▁▂▂▁▁▁▁▁59.61147.22844.28140.19950.40636.84134.16820.97823.89525.71422.9916.90614.71812.8914.17713.61710.2637.28910.54311.5049.4537.5836.4749.6258.344NA6.852NANA
us-gaap:OtherAssetsCurrent ▅▄▄▄▄▄▃▃▇█▂▄▅▅▃▄▄▂▂▂▂▁▁▁▁22.88617.97216.34817.85415.26518.83413.50413.49533.72436.3029.50216.86420.68120.84212.79615.77716.0319.9319.1978.2616.4814.5924.874.5353.371NA1.919NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
us-gaap:PropertyPlantAndEquipmentGross NANA80.203NANANA66.09NANANA48.745NANANA38.32NANANA29.465NANANA23.976NANANA13.559NANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType alrm:ComputerSoftwareAndEquipmentNANA22.805NANANA17.767NANANA16.228NANANA11.624NANANA9.988NANANA8.297NANANA6.524NANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:ConstructionInProgressNANA9.777NANANA4.232NANANA3.79NANANA4.605NANANA1.009NANANA8.662NANANA2.002NANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:FurnitureAndFixturesNANA6.811NANANA5.604NANANA4.102NANANA3.699NANANA3.09NANANA2.257NANANA1.097NANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LandNANA1.398NANANA1.398NANANA0.508NANANA0.398NANANA0.398NANANA0.398NANANA0.398NANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LandAndBuildingNANA4.917NANANA4.917NANANA0.707NANANA0.502NANANANANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LeaseholdImprovementsNANA25.546NANANA23.223NANANA18.338NANANA16.351NANANA13.466NANANA3.387NANANA2.983NANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:SoftwareDevelopmentNANA8.949NANANA8.949NANANA5.072NANANA1.643NANANA1.514NANANA0.975NANANA0.555NANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment NANA35.407NANANA27.542NANANA20.988NANANA14.861NANANA9.285NANANA8.53NANANA5.429NANA
us-gaap:AmortizationOfIntangibleAssets ███▇▇▇▇▆▆▆▇▇▇▇▆▇▆▃▁▁▁▁▁▁▁▁▁▁▁4.34.2614.5214.04.04.0183.9713.43.43.53.8013.83.83.83.5953.73.51.4930.4320.40.40.50.5610.60.50.50.3680.40.4
us-gaap:PropertyPlantAndEquipmentNet ████▇▇▇▆▅▅▅▅▄▄▄▄▄▃▃▃▃▃▂▂▁44.48145.10344.79642.63940.62739.46738.54832.33229.77429.36627.75728.34926.58725.22823.45923.39922.6120.78820.1817.64517.36117.49415.44612.048.409NA8.13NANA
us-gaap:Goodwill ███▇▇▇▇▄▄▄▄▄▄▄▄▄▄▄▁▁▁▁▁▁▁112.901112.838112.838105.662105.662104.963104.96363.59163.59163.59163.59163.59163.59163.59163.59163.59164.09264.10224.72324.72324.72324.72324.72324.72324.723NA21.374NANA
us-gaap:FiniteLivedIntangibleAssetsNet ▇██▇▇██▅▆▆▆▆▇▇▇███▁▁▁▁▁▁▁94.73798.998103.25991.38495.40299.42103.43868.80272.18175.5679.06782.86886.66990.46694.28697.863101.144104.6644.5684.955.3855.826.3186.8797.441NA5.092NANA
us-gaap:DeferredTaxAssetsLiabilitiesNet NANA21.692NANANA19.136NANANA28.951NANANA18.424NANANANANANANANANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset ▄▅▇▇▇█▄▁▁▂30.58131.74733.45533.89933.82134.93930.52327.5227.74528.413NANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ██▆▅▆▆▆▆▄▄▄▄▄▃▂▂▂▁▁▁▁▁▂▂▄24.25122.99318.23316.617.4918.02117.51617.61814.0613.57413.55512.48213.2129.3097.9257.2977.4534.7914.8385.2263.9484.1116.6436.45211.995NA9.371NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
us-gaap:AccountsPayableCurrent █▇▆▅█▆▅▂▃▂▂▂▃▂▂▃▃▂▂▂▃▂▁▂▂50.25344.74838.16332.348.57138.99232.87820.69322.06320.29820.21419.64621.51916.51817.00823.12423.64320.05118.28920.03421.55618.13312.81317.90216.724NA11.179NANA
us-gaap:AccruedLiabilitiesCurrent ▃▃▃▃▃▂▃▂████▂▂▁▁▂▁▂▁▁▂▁▁▁13.02411.69711.44912.5759.6498.20410.0929.23435.80234.67234.55735.0077.5625.4294.3014.4275.4984.8535.2983.0343.5535.2294.2442.4983.431NA1.911NANA
us-gaap:ContractWithCustomerLiabilityCurrent █▆▃▄▂▃▁▁▂▂▂▂▂6.3015.2834.0374.4113.5424.0283.0433.0633.563.6983.3563.5393.46NA3.292NANANANANANANANANANANANANANA
us-gaap:LiabilitiesCurrent █▇▇▆▇▆▅▄▆▅▅▅▃▂▂▃▃▂▂▂▂▁▁▁▁104.10291.07390.24482.82892.76977.65975.79556.70583.21675.64375.2773.00645.64637.34144.50349.12948.22341.00339.69937.21335.81333.34329.07933.50331.658NA22.748NANA
us-gaap:OperatingLeaseLiabilityCurrent ███▇▆▆▄▂▂▁10.13210.0369.9739.479.1988.8037.6836.6846.5496.227NANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesCurrent ▆▅▅▇▇█▇▄▃▁▄▃▂▆▆▆▆▅▁▅▁▃▁▄▅4.8614.4634.3155.1545.4825.8935.6163.513.3032.0563.4593.1162.8244.6774.9734.9354.7284.2142.2074.4732.2213.2962.2193.8264.099NA2.143NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
 us-gaap:LongTermDebt us-gaap:DebtInstrument alrm:ConvertibleSeniorNotesDue2026█▁416.921412.772NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LongTermDebtNoncurrent NANA110.0111.0112.0113.063.064.065.066.067.068.069.070.071.072.072.773.76.76.76.76.76.76.76.7NA6.7NANA
us-gaap:OtherLiabilitiesNoncurrent ▅▄▄▄▄▄▄▁▁▁▇▇█████▇█▇▇▆▆▄▂8.557.4516.8117.7247.4267.8887.4891.8841.8541.6213.30613.27813.44113.59213.92514.02814.21612.49113.55712.13811.87111.510.4847.4873.252NA1.67NANA
us-gaap:OperatingLeaseLiabilityNoncurrent ▁▃▅▆▆█▅▃▃▄33.69135.49137.69738.60538.48640.26437.19935.29135.50336.305NANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo ▃▁█▂9.9529.6910.469.831NANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree ▂▁█▅8.6258.499.6489.071NANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour ▁▁█▇7.5357.5368.4948.299NANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA7.539NANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA4.443NANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
us-gaap:StockholdersEquity ██▇▇▆▆▆▆▅▅▅▅▅▅▅▅▄▄▄▄▄▄▄▄▁573.437548.501467.752438.716393.253366.216355.651336.166312.428292.496277.589264.741266.198250.258232.827229.914211.286198.407191.249184.3177.582174.448170.131165.804-134.295NA-121.844NANA
us-gaap:CommonStockValue █████████████████▇▇▇▇▇▇▇▁0.50.4980.4960.4930.4910.4880.4870.4860.4850.4820.4810.480.4770.4730.4720.4710.4670.4630.4610.4590.4560.4560.4550.4540.028NA0.026NANA
us-gaap:AdditionalPaidInCapital ██▇▇▇▆▆▆▆▆▆▆▆▆▆▆▆▆▅▅▅▅▅▅▁481.937471.748405.831392.765383.388373.349365.627359.178353.131346.998341.139336.22330.028324.825321.032318.44314.919311.909308.697304.726300.578299.359297.781296.4440.0NA7.168NANA
us-gaap:RetainedEarningsAccumulatedDeficit ██▇▇▆▅▅▄▄▃▃▃▃▃▂▂▂▂▁▁▁▁▁▁▁96.14981.40466.57450.60714.523-2.472-10.463-23.498-41.188-54.984-64.031-71.959-64.307-75.04-88.677-88.997-104.1-113.965-117.909-120.885-123.452-125.325-128.063-131.052-134.281NA-128.996NANA
us-gaap:TreasuryStockValue ██████▁5.1495.1495.1495.1495.1495.1490.0NANANANANANANANANANANA0.0NA0.00.0420.0420.0420.042NA0.042NANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue █▁10.0567.888NA7.4487.0956.358NA5.0345.4334.267NA3.4863.6312.7842.2791.9061.9151.3131.1211.0860.9420.8521.1490.809NANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▆▅█▅█▄▆▁▆▁▆▅▃▂▅▄▃▄▃▁▁▃▂▄▂▂▃▁24.07621.23235.4118.62235.14812.923.2650.9824.054-1.18725.73219.77411.6843.5218.64213.80911.76712.9698.6941.3250.5616.925.96113.464.2533.4639.147-0.127NA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▇▆█▇▇▅█▇▆▇▇▇▇▇▇▇▁▇▇▇▇▇▇▇▇▇▇-3.309-9.067-32.5121.542-2.293-7.013-67.52512.484.654-23.023-4.06-3.186-3.084-3.047-5.8121.02-6.077-157.926-5.945-3.146-2.165-0.17-4.309-4.823-2.181-6.7360.544-4.304NA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁█▁▁▁▂▁▁▁▁▁▁▁▁▁▁▁▃▁▁▁▁▁▃▁▁▁▁-0.257376.5483.3831.1851.2446.216-0.4340.012-0.2990.5910.1461.6960.561-0.004-1.1410.8950.07667.4732.8352.707-0.0770.7370.10597.081-20.378-0.11-0.203-0.698NA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▂█▂▂▂▃▁▂▂▁▂▂▂▂20.51388.7136.28341.34934.09552.103-44.69413.47228.409-23.61921.81818.2849.1610.469NANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
us-gaap:AmortizationOfFinancingCosts NANA0.0270.0270.0270.0270.0270.0270.0270.0270.0270.0270.0270.0270.0270.0230.0240.0230.0240.0250.0280.0260.0270.0270.0260.0280.0270.027NA
 us-gaap:AmortizationOfFinancingCosts us-gaap:DebtInstrument alrm:ConvertibleSeniorNotesDue2026█▁0.5570.432NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:DeferredIncomeTaxExpenseBenefit ▃▃▄▅▃▅▅▅▄▄▃▁▄▄█▃▄▄▃▄▄▄▄▄▄▄▄▄-3.965-3.178-1.7761.046-3.8531.3271.0972.129-0.7620.135-2.374-7.77-1.5420.2048.848-3.527-1.71-1.123-2.489-1.342-0.745-0.253-1.392-0.035-1.242-0.883-0.68-0.413NA
us-gaap:IncreaseDecreaseInAccountsReceivable ▆▆▅▆▁▇▇▆▆▇▁▅█▅▄▃▅▃▅▅▆▅▄▃▇▄▃▃4.885.6852.9674.582-5.5158.0646.2695.0774.1746.753-5.8472.9959.1373.0130.569-0.6563.578-1.581.8441.9154.612.812-0.133-1.4047.2610.186-0.538-0.54NA
us-gaap:IncreaseDecreaseInInventories █▅▅▁█▅▆▃▃▅▆▄▄▃▄▅▅▃▃▄▄▄▃▄▄▄▄▄12.3832.9473.438-9.02913.5652.6738.503-2.917-1.8192.7246.0842.1881.828-1.2870.563.3542.974-3.553-0.9622.0521.8691.109-3.1021.3080.3751.041-0.4651.339NA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▆▅█▅█▄▆▁▆▁▆▅▃▂▅▄▃▄▃▁▁▃▂▄▂▂▃▁24.07621.23235.4118.62235.14812.923.2650.9824.054-1.18725.73219.77411.6843.5218.64213.80911.76712.9698.6941.3250.5616.925.96113.464.2533.4639.147-0.127NA
us-gaap:NetIncomeLoss ▅▅▅█▅▄▄▅▄▄▃▁▄▄▂▅▄▃▃▃▃▃▃▃▃▃▃▃▃14.74514.8315.96736.08416.9958.80713.03517.6913.7969.017.928-7.65210.73310.5150.3215.1039.8653.9632.9762.5671.8732.7383.2753.2292.5093.0414.4862.6672.076
us-gaap:ProfitLoss ▃▃▃█▃▁▂▃▂▁14.4914.5515.63935.82516.6258.57112.83417.6913.7969.01NANANANANANANANANANANANANANANANANANANA
us-gaap:ShareBasedCompensation █▆▇▆▆▅▅▄▅▄▃▃▃▃▂▂▂▂▁▁▁▁▁▁▁▁▁▁10.0567.8888.2757.4487.0956.3585.8825.0355.424.2663.7593.4573.5442.6692.2791.9061.9151.3131.1211.0860.9420.8521.1490.8090.8280.5610.9020.746NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▇▆█▇▇▅█▇▆▇▇▇▇▇▇▇▁▇▇▇▇▇▇▇▇▇▇-3.309-9.067-32.5121.542-2.293-7.013-67.52512.484.654-23.023-4.06-3.186-3.084-3.047-5.8121.02-6.077-157.926-5.945-3.146-2.165-0.17-4.309-4.823-2.181-6.7360.544-4.304NA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▃▄▅▃▃▄█▅▃▃▂▃▃▃▃▂▃▃▃▂▂▃▄▄▁▁▁▄3.3124.0695.4643.5613.3973.7198.6644.9522.7462.9621.6983.1863.0843.0472.8121.9383.0772.6372.9451.5462.0262.5383.8274.5080.9861.0260.7423.856NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁█▁▁▁▂▁▁▁▁▁▁▁▁▁▁▁▃▁▁▁▁▁▃▁▁▁▁-0.257376.5483.3831.1851.2446.216-0.4340.012-0.2990.5910.1461.6960.561-0.004-1.1410.8950.07667.4732.8352.707-0.0770.7370.10597.081-20.378-0.11-0.203-0.698NA
us-gaap:PaymentsForRepurchaseOfCommonStock NANA0.00.00.05.1490.00.00.00.00.00.0NANA0.00.007NANA-0.0010.003NANA0.00.0NANA0.0040.0NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyType,us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable,us-gaap:SubsequentEventType alrm:ServiceProvider,us-gaap:NotesReceivable,us-gaap:SubsequentEventNANANANANANANANANANANANANANANANANANANANANANANANANANANANANA

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value500000.0498000.0496000.0493000.0491000.0488000.0487000.0486000.0485000.0482000.0481000.0480000.0477000.0473000.0472000.0471000.0467000.0463000.0461000.0459000.0456000.0456000.0455000.0454000.028000.026000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.20.20.20.20.20.20.00.0

Shares Outstanding

us-gaap:SharesOutstanding us-gaap:StatementEquityComponents

us-gaap:SharesOutstanding

us-gaap:CommonStock


Shares
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312014-12-312013-12-312012-12-31
Value5049494949484848484848484747474746464645452.6141.6571.251
Percentage of SharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStock


Shares
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value0.1470.1470.1470.147-0.147-0.1470.0
Percentage of SharesOutstanding0.30.30.30.3-0.3-0.30.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-30
Value5151505050505050474949494948484747462.7063694.1727874.3456853.71844
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-30
Value4949494848484848474747464646454545442.7063692.6368132.4294452.32882
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EmployeeStockOption


Antidilutive
Period End2021-06-302020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-30
Value133700.0136430.0360030.0272880.0187790.0148390.046693.0191170.0191050.0231950.0189120.0313650.0133750.0112350.0119750.0514120.032000.0507380.0116500.0185150.0102000.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStockUnitsRSU


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302015-09-30
Value149290.0125190.027199.012965.0197480.0325110.013550.0181350.033100.012772.0150100.000025640.000
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount111.70.019.93.672.4173.19.1388.417.36.764.70.00.00.022.80.00.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.30.30.320.740.350.180.270.360.290.190.16-0.160.230.220.010.320.210.090.060.060.040.060.070.07-6.090.060.080.050.04
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.280.290.310.710.340.180.260.350.270.180.16-0.160.220.210.010.310.20.080.060.050.040.060.070.07-6.090.040.040.030.02
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value107.8888.2997.4487.0956.3585.8795.0355.424.2663.733.4573.5442.6692.2791.9061.9151.3131.1211.0860.9420.8521.1250.8091.6050.5610.9020.7460.831
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.34.65.04.75.04.24.23.94.53.83.33.13.42.92.62.12.21.81.61.61.51.42.01.53.11.22.01.72.0

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType

alrm:EmployeeStockPurchasePlan


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value0.0480.0470.0480.0380.0320.0470.0540.0480.0470.0440.0440.0220.0410.040.0340.0310.0270.0230.0180.0220.0190.0190.00.00.00.0
Percentage of AllocatedShareBasedCompensationExpense0.50.60.60.50.50.70.91.00.91.01.20.61.21.51.51.61.41.81.62.02.02.20.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax alrm:EmployeeStockPurchasePlan0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EmployeeStockOption


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value1.1590.6170.7110.8791.0150.8010.9470.9411.1020.7930.8450.851.0880.7280.9080.9391.0830.9830.9961.030.9230.8331.1490.8090.6560.540.8810.7240.809
Percentage of AllocatedShareBasedCompensationExpense11.57.88.611.814.312.616.118.720.318.622.724.630.727.339.849.356.674.988.894.898.097.8102.1100.040.996.397.797.197.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.60.40.40.60.70.50.70.70.90.70.80.81.00.81.01.01.31.31.41.51.41.42.01.51.31.21.91.71.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:EmployeeStockOption0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RestrictedStockUnitsRSU


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value8.8497.2247.5166.5316.0485.514.8814.0464.2713.4292.872.5852.4151.91.3370.9360.8050.2880.1070.0340.00.00.00.0
Percentage of AllocatedShareBasedCompensationExpense88.091.690.687.785.286.783.080.478.880.476.974.868.171.258.749.142.021.99.53.10.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.74.24.54.14.33.63.53.23.53.12.62.32.32.01.51.00.90.40.20.10.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RestrictedStockUnitsRSU0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:IncomeStatementLocation

us-gaap:GeneralAndAdministrativeExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value3.1632.081.9632.1542.0971.7821.7121.7141.7811.2671.2011.1911.4811.0280.730.5840.7550.5690.5230.4440.2360.2270.6610.3051.2260.2940.4660.4340.482
Percentage of AllocatedShareBasedCompensationExpense31.526.423.728.929.628.029.134.032.929.732.234.541.838.532.030.639.443.346.740.925.126.658.837.776.452.451.758.258.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.71.21.21.41.51.21.21.31.51.11.11.11.41.10.80.60.90.80.70.70.40.41.20.62.40.61.01.01.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:GeneralAndAdministrativeExpense0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ResearchAndDevelopmentExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value5.6585.05.554.564.2263.8193.482.7873.1682.6192.2171.9651.7441.4061.3471.1411.0950.6310.4840.5120.5550.4840.3760.390.2930.2070.3330.2320.271
Percentage of AllocatedShareBasedCompensationExpense56.363.466.961.259.660.159.255.458.561.459.456.849.252.759.159.957.248.143.247.158.956.833.448.218.336.936.931.132.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.02.93.42.93.02.52.52.22.62.32.01.81.71.51.51.31.30.90.70.80.90.80.70.70.60.40.70.50.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ResearchAndDevelopmentExpense0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:SellingAndMarketingExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value1.2350.8080.7620.7340.7720.7570.690.5340.4710.380.3410.3010.3190.2350.2020.1810.0650.1130.1140.130.1510.1410.1120.1140.0860.060.1030.080.078
Percentage of AllocatedShareBasedCompensationExpense12.310.29.29.910.911.911.710.68.78.99.18.79.08.88.99.53.48.610.212.016.016.510.014.15.410.711.410.79.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.70.50.50.50.50.50.50.40.40.30.30.30.30.30.20.20.10.20.20.20.20.20.20.20.20.10.20.20.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:SellingAndMarketingExpense0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostOfGoodsAndServicesSold


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value7765596149575247443838413628273129262626252120192016171718
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax41.038.135.838.534.638.237.437.236.634.734.937.534.930.631.435.434.735.938.338.939.135.835.337.039.436.538.741.042.8

us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService

alrm:HardwareandOtherRevenue


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value6050454636453935312627302517182221
Percentage of CostOfGoodsAndServicesSold77.877.076.676.673.578.776.073.871.668.470.272.669.861.966.070.071.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax31.929.327.429.525.430.028.427.426.223.724.527.324.418.920.724.824.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax alrm:HardwareandOtherRevenue79.577.70.079.878.476.10.081.781.182.50.081.276.070.90.079.578.8

us-gaap:LicenseAndService


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value17151314131212121212111111109.4739.5458.5
Percentage of CostOfGoodsAndServicesSold22.223.023.423.426.521.324.026.228.431.629.827.430.238.134.030.028.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.18.88.49.09.28.19.09.710.411.010.410.310.611.610.710.69.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:LicenseAndService15.214.10.014.313.613.40.014.615.415.40.015.515.515.90.015.414.4

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


Gains
Period End2021-06-302021-03-31
Value0-185000.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0-0.1

us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:CreditFacility, us-gaap:DebtInstrument

us-gaap:RevolvingCreditFacility, alrm:TwoThousandSeventeenFacility


Gains
Period End2021-06-302021-03-31
Value0-200000.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.0108.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RevolvingCreditFacility alrm:TwoThousandSeventeenFacility0.00.0

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value232223171720181813191743181613121315151414139.9579.9328.5147.076.9386.7467.209
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.313.313.911.012.313.712.914.611.417.116.039.017.317.415.314.415.620.722.621.822.022.217.518.416.415.415.215.717.1

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value12111342149.7731420149.2528.516-16.7138.1791112105.3594.5064.2762.9252.8494.3313.9114.294.1735.0916.5833.1593.507
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.86.78.326.710.16.410.716.111.68.27.6-14.97.812.613.811.26.26.16.14.34.47.36.97.98.011.114.57.48.3

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value-1.738-2.913-1.9716.546-2.2771.2022.1382.8730.3130.2420.588-9.061-2.5541.20211-5.018-4.5060.5431.30.3580.9761.5930.9221.0611.6642.052.0970.4921.431
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.9-1.7-1.24.1-1.60.81.52.20.30.20.5-8.1-2.41.313.5-5.6-5.20.71.90.51.52.71.62.03.24.54.61.13.4

Interest Expense Debt

us-gaap:InterestExpenseDebt us-gaap:DebtInstrument

us-gaap:InterestExpenseDebt

alrm:ConvertibleSeniorNotesDue2026


Interest
Period End2021-06-302021-03-31
Value4149000.03244000.0
Percentage of InterestExpenseDebt100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.21.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax alrm:ConvertibleSeniorNotesDue20260.00.0

Interest Expense Long Term Debt

us-gaap:InterestExpenseLongTermDebt

us-gaap:InterestExpenseLongTermDebt


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value4154000.03368000.0527000.0556000.0868000.0645000.0652000.0715000.0786000.0821000.0759000.0736000.0751000.0672000.0651000.0658000.0674000.0216000.053000.049000.047000.041000.050000.044000.042000.042000.043000.040000.055000.0
Percentage of InterestExpenseLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.22.00.30.40.60.40.50.60.60.70.70.70.70.70.70.70.80.30.10.10.10.10.10.10.10.10.10.10.1

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value14141536168.8071317139.017.928-7.65210100.32159.8653.9632.9762.5671.8732.7383.2753.2292.5093.0414.4862.6672.076
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.88.69.622.712.05.89.313.811.38.07.1-6.810.311.30.416.811.55.34.33.82.94.65.86.04.86.69.86.24.9

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value141436168.80717139.01-7.65210100.322.9762.5671.8732.7382.9893.229
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.091.3100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.88.622.712.05.813.811.38.0-6.810.311.30.44.33.82.94.65.36.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value1414168.8071317139.017.928-7.65210100.321159.863.9612.9642.5671.8732.7383.2673.179-16.4780.1460.1980.1180.088
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.88.612.05.89.313.811.38.07.1-6.810.311.30.416.811.55.34.23.82.94.65.75.9-31.70.30.40.30.2

Operating Expenses

us-gaap:OperatingExpenses

us-gaap:OperatingExpenses


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value9491927977847268636464865952484750433838363332292724202220
Percentage of OperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax50.253.256.150.154.855.351.953.351.857.157.677.456.956.554.453.158.458.155.857.056.657.057.255.052.352.345.951.448.7

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value16151318149.8671412149.2218.393-16.6948.511112105.8964.4854.1542.8352.8084.2614.2474.3414.2775.1267.0413.2793.562
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.98.78.111.410.66.510.69.511.58.27.5-14.98.112.914.211.66.96.06.04.24.47.27.58.08.211.115.57.78.5

us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:IntersegmentElimination, alrm:Alarm.Com


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.2330.1530.1470.1890.0160.0410.0630.0620.044-0.035-0.0620.026-0.1520.005-0.107-0.011-0.039-0.022-0.124-0.062-0.079-0.047-0.1120.004-0.033-0.138-0.066-0.008-0.057
Percentage of OperatingIncomeLoss1.41.01.11.00.10.40.40.50.3-0.4-0.7-0.2-1.80.0-0.8-0.1-0.7-0.5-3.0-2.2-2.8-1.1-2.60.1-0.8-2.7-0.9-0.2-1.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.10.10.00.00.00.00.0-0.0-0.10.0-0.10.0-0.1-0.0-0.0-0.0-0.2-0.1-0.1-0.1-0.20.0-0.1-0.3-0.1-0.0-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination alrm:Alarm.Com-29.9-16.90.0-34.1-2.3-4.80.0-4.8-4.13.50.0-1.910.4-0.60.01.47.83.40.08.910.58.00.0-8.025.435.40.010.028.8

us-gaap:IntersegmentElimination, us-gaap:AllOtherSegments


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value-0.122-0.0040.005-0.054-0.213-0.119-0.118-0.078-0.0160.0850.023-0.0430.1650.0230.1090.0070.110.1360.139-0.0090.0630.124-0.1990.0330.0220.1280.0540.135-0.073
Percentage of OperatingIncomeLoss-0.7-0.00.0-0.3-1.4-1.2-0.8-0.6-0.10.90.30.31.90.20.90.11.93.03.3-0.32.22.9-4.70.80.52.50.84.1-2.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.1-0.00.0-0.0-0.2-0.1-0.1-0.1-0.00.10.0-0.00.20.00.10.00.10.20.2-0.00.10.2-0.30.10.00.30.10.3-0.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination us-gaap:AllOtherSegments11.41.50.05.47.55.30.03.50.8-5.70.02.5-14.6-2.10.0-0.8-38.2-112.40.00.7-9.2-54.40.0-4.7-8.7-24.40.00.00.0

us-gaap:OperatingSegments, alrm:Alarm.Com


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value1917131815101412149.6558.592-15.5939.4271413128.8196.5845.1094.934.3766.867118.8659.378.96106.817.033
Percentage of OperatingIncomeLoss116.3118.0102.9104.2105.4109.699.4104.7105.0104.7102.493.4110.8120.9107.5120.2149.6146.8123.0173.9155.8161.2264.7204.2219.1174.8147.3207.7197.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.310.38.311.811.27.110.610.012.18.67.7-13.99.015.615.213.910.38.97.37.36.811.619.816.418.019.522.815.916.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments alrm:Alarm.Com10.810.70.012.511.87.50.010.612.99.10.0-14.89.616.40.014.710.89.30.07.77.112.30.016.818.520.00.016.116.7

us-gaap:OperatingSegments, us-gaap:AllOtherSegments


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value-2.842-2.853-0.538-0.889-0.609-0.8720.143-0.561-0.737-0.484-0.16-1.084-0.93-2.537-0.946-2.095-2.994-2.213-0.97-2.024-1.552-2.683-6.684-4.561-5.082-3.824-3.318-3.658-3.341
Percentage of OperatingIncomeLoss-17.0-19.0-4.0-4.9-4.1-8.81.0-4.6-5.2-5.2-1.96.5-10.9-21.2-7.5-20.1-50.8-49.3-23.4-71.4-55.3-63.0-157.4-105.1-118.8-74.6-47.1-111.6-93.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.5-1.7-0.3-0.6-0.4-0.60.1-0.4-0.6-0.4-0.1-1.0-0.9-2.7-1.1-2.3-3.5-3.0-1.4-3.0-2.4-4.5-11.7-8.4-9.8-8.3-7.3-8.5-7.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:AllOtherSegments-25.4-35.10.0-9.0-5.2-8.60.0-5.4-7.3-5.30.0-11.5-11.1-42.40.0-33.2-55.1-49.70.0-37.8-38.0-69.70.0-220.0-321.6-185.50.0-573.4-2589.9

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.032-0.1550.678240.0650.0920.0676.380.850.8520.8820.7170.420.3960.350.3420.1370.2370.1750.1390.0880.111-0.286-0.007-0.0620.007-0.415-0.080.0
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0-0.10.415.60.00.10.05.00.70.80.80.60.40.40.40.40.20.30.30.20.10.2-0.5-0.0-0.10.0-0.9-0.20.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value14141535168.5711217139.01
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.78.49.422.611.75.69.113.811.38.0

Research And Development Expense

us-gaap:ResearchAndDevelopmentExpense

us-gaap:ResearchAndDevelopmentExpense


Research
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value4342383636393029282624222120181920141211109.97139.8369.0797.7526.7256.0945.764
Percentage of ResearchAndDevelopmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax23.024.623.523.225.926.121.423.023.423.621.920.420.622.021.321.423.319.617.316.916.716.923.418.217.516.814.814.213.7

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value18817216515814115114012712111211111110492888985746967645956545146454242
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyType, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

alrm:DistributionPartnersTwoAndThree, us-gaap:LoansReceivable


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value0.90.70.50.90.40.40.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.40.30.60.30.30.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.40.30.60.30.30.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax alrm:DistributionPartnersTwoAndThree us-gaap:LoansReceivable100.0100.0100.0100.0100.0100.0100.0

alrm:ServiceProvider, us-gaap:LoansReceivable


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value0.10.10.00.10.10.10.00.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.00.10.10.10.00.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.00.10.10.10.00.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax alrm:ServiceProvider us-gaap:LoansReceivable100.0100.00.0100.0100.0100.00.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

us-gaap:IntersegmentElimination, alrm:HardwareandOtherRevenue, alrm:Alarm.Com


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-0.779-0.905-0.975-0.554-0.703-0.861-0.937-1.287-1.078-0.999-1.164-1.343-1.459-0.782-1.006-0.794-0.497
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.4-0.5-0.6-0.3-0.5-0.6-0.7-1.0-0.9-0.9-1.0-1.2-1.4-0.8-1.1-0.9-0.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.4-0.5-0.6-0.3-0.5-0.6-0.7-1.0-0.9-0.9-1.0-1.2-1.4-0.8-1.1-0.9-0.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination alrm:HardwareandOtherRevenue alrm:Alarm.Com100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntersegmentElimination, alrm:HardwareandOtherRevenue, us-gaap:AllOtherSegments


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-1.072-0.266-0.176-0.992-2.837-2.236-2.127-2.257-2.031-1.479-1.407-1.721-1.131-1.107-0.748-0.842-0.288
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.6-0.2-0.1-0.6-2.0-1.5-1.5-1.8-1.7-1.3-1.3-1.5-1.1-1.2-0.8-0.9-0.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.6-0.2-0.1-0.6-2.0-1.5-1.5-1.8-1.7-1.3-1.3-1.5-1.1-1.2-0.8-0.9-0.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination alrm:HardwareandOtherRevenue us-gaap:AllOtherSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, alrm:HardwareandOtherRevenue, alrm:Alarm.Com


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value7464605744574841363030343023212524
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax39.537.336.336.331.537.934.432.130.027.027.831.029.324.823.728.428.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax39.537.336.336.331.537.934.432.130.027.027.831.029.324.823.728.428.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments alrm:HardwareandOtherRevenue alrm:Alarm.Com100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, alrm:HardwareandOtherRevenue, us-gaap:AllOtherSegments


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2.9082.0171.2242.5454.9265.5585.1095.4845.9144.4115.1735.9785.5083.6564.274.1613.616
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.51.20.71.63.53.73.64.34.93.94.65.35.33.94.84.64.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.51.20.71.63.53.73.64.34.93.94.65.35.33.94.84.64.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments alrm:HardwareandOtherRevenue us-gaap:AllOtherSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:LicenseAndService, alrm:Alarm.Com


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value104101979288878479787573706865615957
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax55.558.759.058.462.857.559.962.564.267.165.963.465.270.869.666.466.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax55.558.759.058.462.857.559.962.564.267.165.963.465.270.869.666.466.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:LicenseAndService alrm:Alarm.Com100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:LicenseAndService, us-gaap:AllOtherSegments


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value8.2896.127.837.2926.7824.5385.9414.974.234.6534.4333.4082.8922.3263.3862.151.819
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.43.54.74.64.83.04.23.93.54.14.03.02.82.53.82.42.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.43.54.74.64.83.04.23.93.54.14.03.02.82.53.82.42.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:LicenseAndService us-gaap:AllOtherSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:IntersegmentElimination, alrm:Alarm.Com


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value-0.779-0.905-0.975-0.554-0.703-0.861-0.937-1.287-1.078-0.999-1.164-1.343-1.459-0.782-1.006-0.794-0.497-0.649-0.823-0.7-0.754-0.586-0.354-0.05-0.13-0.39-0.234-0.08-0.198
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.4-0.5-0.6-0.3-0.5-0.6-0.7-1.0-0.9-0.9-1.0-1.2-1.4-0.8-1.1-0.9-0.6-0.9-1.2-1.0-1.2-1.0-0.6-0.1-0.3-0.8-0.5-0.2-0.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.4-0.5-0.6-0.3-0.5-0.6-0.7-1.0-0.9-0.9-1.0-1.2-1.4-0.8-1.1-0.9-0.6-0.9-1.2-1.0-1.2-1.0-0.6-0.1-0.3-0.8-0.5-0.2-0.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination alrm:Alarm.Com100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntersegmentElimination, us-gaap:AllOtherSegments


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value-1.072-0.266-0.176-0.992-2.837-2.236-2.127-2.257-2.031-1.479-1.407-1.721-1.131-1.107-0.748-0.842-0.288-0.121-0.496-1.229-0.686-0.228-0.485-0.7-0.254-0.525-0.0330.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.6-0.2-0.1-0.6-2.0-1.5-1.5-1.8-1.7-1.3-1.3-1.5-1.1-1.2-0.8-0.9-0.3-0.2-0.7-1.8-1.1-0.4-0.9-1.3-0.5-1.1-0.10.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.6-0.2-0.1-0.6-2.0-1.5-1.5-1.8-1.7-1.3-1.3-1.5-1.1-1.2-0.8-0.9-0.3-0.2-0.7-1.8-1.1-0.4-0.9-1.3-0.5-1.1-0.10.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination us-gaap:AllOtherSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:OperatingSegments, alrm:Alarm.Com


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value1791651571501331441321201141051041059888828581706564615654525044444242
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax95.196.095.294.894.295.494.394.694.294.193.794.394.495.693.494.894.695.094.095.095.994.995.797.697.797.598.098.7100.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax95.196.095.294.894.295.494.394.694.294.193.794.394.495.693.494.894.695.094.095.095.994.995.797.697.797.598.098.7100.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments alrm:Alarm.Com100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:AllOtherSegments


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value118.1379.0549.83711101110109.0649.6069.3868.45.9827.6566.3115.4354.4525.5375.3554.0883.8473.3382.0731.582.0611.1630.6380.129
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.94.75.56.28.36.67.98.28.38.18.68.48.06.48.67.06.36.07.97.96.36.55.93.83.04.52.61.50.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.94.75.56.28.36.67.98.28.38.18.68.48.06.48.67.06.36.07.97.96.36.55.93.83.04.52.61.50.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:AllOtherSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService

alrm:HardwareandOtherRevenue


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value7565605845595042393233373324232827
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax40.137.736.337.032.439.535.933.632.328.730.133.632.126.726.631.231.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax40.137.736.337.032.439.535.933.632.328.730.133.632.126.726.631.231.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax alrm:HardwareandOtherRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LicenseAndService


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value11310710510095919084828077747067656158
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax59.962.363.763.067.660.564.166.467.771.369.966.467.973.373.468.868.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax59.962.363.763.067.660.564.166.467.771.369.966.467.973.373.468.868.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:LicenseAndService100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

alrm:SoftwareLicenseRevenue, alrm:Alarm.Com


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value8.38.79.09.59.89.7101011111010109.99.69.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.45.05.46.06.96.47.58.49.09.89.69.49.810.710.810.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.45.05.46.06.96.47.58.49.09.89.69.49.810.710.810.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax alrm:SoftwareLicenseRevenue alrm:Alarm.Com100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Selling And Marketing Expense

us-gaap:SellingAndMarketingExpense

us-gaap:SellingAndMarketingExpense


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value2018231816171814151316141410101011109.448109.8518.9767.8358.4258.0647.9165.9638.1076.67
Percentage of SellingAndMarketingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.911.014.211.611.911.213.111.412.811.814.712.614.011.712.211.613.813.913.515.815.315.213.815.615.517.213.118.915.9

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value11561114731698662624557501505479440427402380371374356335261250241235226223119120
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:IntersegmentElimination, alrm:Alarm.Com


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value-61.408-58.848-58.983-56.356-52.736-50.995-49.997-52.086-49.987-50.885-61.309-60.212-60.189-56.1760.00.00.00.00.00.00.00.00.0
Percentage of Assets-5.3-5.3-8.1-8.1-8.0-8.2-9.0-10.4-9.9-10.6-13.9-14.1-14.9-14.80.00.00.00.00.00.00.00.00.0
Percentage of Assets-5.3-5.3-8.1-8.1-8.0-8.2-9.0-10.4-9.9-10.6-13.9-14.1-14.9-14.80.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:IntersegmentElimination alrm:Alarm.Com100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.0

us-gaap:IntersegmentElimination, us-gaap:AllOtherSegments


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value-0.012-0.0050.0060.0290.0150.00.00.00.00.0-0.001-0.001-0.003-0.1510.00.00.00.00.00.00.00.00.0
Percentage of Assets-0.0-0.00.00.00.00.00.00.00.00.0-0.0-0.0-0.0-0.00.00.00.00.00.00.00.00.00.0
Percentage of Assets-0.0-0.00.00.00.00.00.00.00.00.0-0.0-0.0-0.0-0.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:IntersegmentElimination us-gaap:AllOtherSegments100.0100.0100.0100.0100.00.00.00.00.00.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, alrm:Alarm.Com


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value11911148763729692656589534538514482469444421352355337316246237231225215209104108
Percentage of Assets103.0103.1104.4104.6104.5105.1105.8106.8106.6107.2109.5109.8110.4110.894.994.994.694.494.595.195.895.895.293.887.790.1
Percentage of Assets103.0103.1104.4104.6104.5105.1105.8106.8106.6107.2109.5109.8110.4110.894.994.994.694.494.595.195.895.895.293.887.790.1
Percentage of Assets us-gaap:OperatingSegments alrm:Alarm.Com100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:AllOtherSegments


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value2624262422181718161619181815181919181412109.97910131411
Percentage of Assets2.32.23.73.53.43.03.23.63.33.44.54.34.64.05.15.15.45.65.54.94.24.24.86.212.39.9
Percentage of Assets2.32.23.73.53.43.03.23.63.33.44.54.34.64.05.15.15.45.65.54.94.24.24.86.212.39.9
Percentage of Assets us-gaap:OperatingSegments us-gaap:AllOtherSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value5715552532482582461901641921871631621361291381441441376966646155575140
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets49.449.834.635.639.039.634.232.938.239.137.138.133.934.237.438.640.740.926.826.426.626.024.825.742.833.3

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value11561114731698662624557501505479440427402380371374356335261250241235226223119120
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312012-12-31
Value573548467438393366355336312292277264266250232229211198191184177174170165-134.295-121.844-140.69-147.051
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets49.649.263.962.859.358.763.867.161.860.962.961.966.165.862.661.459.359.173.273.673.474.075.274.3-112.6-100.80.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312012-12-31
Value4814714053923833733653593533463413363303243213183143113083043002992972960.07.1681.7770.0
Percentage of StockholdersEquity84.086.086.889.597.5101.9102.8106.8113.0118.6122.9127.0124.0129.8137.9138.5149.0157.2161.4165.3169.3171.6175.0178.8-0.0-5.9-1.3-0.0
Percentage of Assets41.742.355.556.357.959.865.571.769.972.377.478.781.985.586.485.088.492.9118.2121.7124.2126.9131.7132.90.05.90.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312012-12-31
Value0.50.4980.4960.4930.4910.4880.4870.4860.4850.4820.4810.480.4770.4730.4720.4710.4670.4630.4610.4590.4560.4560.4550.4540.0280.0260.0170.013
Percentage of StockholdersEquity0.10.10.10.10.10.10.10.10.20.20.20.20.20.20.20.20.20.20.20.20.30.30.30.3-0.0-0.0-0.0-0.0
Percentage of Assets0.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.20.20.20.20.20.20.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312012-12-31
Value9681665014-2.472-10.463-23.498-41.188-54.984-64.031-71.959-64.307-75.04-88.677-88.997-104.1-113.965-117.909-120.885-123.452-125.325-128.063-131.052-134.281-128.996-142.498-147.022
Percentage of StockholdersEquity16.814.814.211.53.7-0.7-2.9-7.0-13.2-18.8-23.1-27.2-24.2-30.0-38.1-38.7-49.3-57.4-61.7-65.6-69.5-71.8-75.3-79.0100.0105.9101.3100.0
Percentage of Assets8.37.39.17.22.2-0.4-1.9-4.7-8.1-11.5-14.5-16.8-16.0-19.7-23.9-23.8-29.2-34.0-45.1-48.3-51.0-53.1-56.6-58.7-112.6-106.70.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312012-12-31
Value-5.149-5.149-5.149-5.149-5.149-5.1490.00.00.00.00.00.0-0.042-0.042-0.042-0.042-0.042-0.042-0.042
Percentage of StockholdersEquity-0.9-0.9-1.1-1.2-1.3-1.40.00.00.00.00.00.0-0.0-0.0-0.00.00.00.00.0
Percentage of Assets-0.4-0.5-0.7-0.7-0.8-0.80.00.00.00.00.00.0-0.0-0.0-0.0-0.0-0.00.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value8377953973873483092432632682402282131931741631551371191901831771711611666071
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets72.471.454.355.552.549.643.752.653.150.151.750.048.145.844.141.438.535.572.873.373.472.771.274.550.559.4

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312012-12-31
Value662642253247205171119164150122146124105969684686314013513413512812620394233383341
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets57.357.634.635.431.127.521.432.829.825.533.129.126.325.525.922.619.318.853.853.955.557.656.856.717.50.035.20.00.00.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value6626422532472051711191641501221461241059696140
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets57.357.634.635.431.127.521.432.829.825.533.129.126.325.525.953.8

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value9288838176817664605649555243404141382928272321212317
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.07.911.411.711.613.113.713.011.911.711.213.013.011.510.911.011.811.611.411.511.410.09.49.719.814.3

Inventory Net

us-gaap:InventoryNet

us-gaap:InventoryNet


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value59474440503634202325221614121413107.28910119.4537.5836.4749.6258.3446.852
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.24.26.15.87.65.96.14.24.75.45.24.03.73.43.83.62.92.24.04.63.93.22.94.37.05.7

Other Assets Current

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value221716171518131333369.5021620201215169.9319.1978.2616.4814.5924.874.5353.3711.919
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.01.62.22.62.33.02.42.76.77.62.23.95.15.53.44.24.53.03.53.32.71.92.22.02.81.6

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value80664838292313
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets11.011.811.110.311.310.611.2

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

alrm:ComputerSoftwareAndEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value221716119.9888.2976.524
Percentage of PropertyPlantAndEquipmentGross28.426.933.330.333.934.648.1
Percentage of Assets3.13.23.73.13.83.75.4
Percentage of Assets alrm:ComputerSoftwareAndEquipment0.00.00.00.00.00.00.0

us-gaap:ConstructionInProgress


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value9.7774.2323.794.6051.0098.6622.002
Percentage of PropertyPlantAndEquipmentGross12.26.47.812.03.436.114.8
Percentage of Assets1.30.80.91.20.43.81.7
Percentage of Assets us-gaap:ConstructionInProgress0.00.00.00.00.00.00.0

us-gaap:FurnitureAndFixtures


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value6.8115.6044.1023.6993.092.2571.097
Percentage of PropertyPlantAndEquipmentGross8.58.58.49.710.59.48.1
Percentage of Assets0.91.00.91.01.21.00.9
Percentage of Assets us-gaap:FurnitureAndFixtures0.00.00.00.00.00.00.0

us-gaap:Land


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value1.3981.3980.5080.3980.3980.3980.398
Percentage of PropertyPlantAndEquipmentGross1.72.11.01.01.41.72.9
Percentage of Assets0.20.30.10.10.20.20.3
Percentage of Assets us-gaap:Land0.00.00.00.00.00.00.0

us-gaap:LandAndBuilding


Property
Period End2020-12-312019-12-312018-12-312017-12-31
Value4.9174.9170.7070.502
Percentage of PropertyPlantAndEquipmentGross6.17.41.51.3
Percentage of Assets0.70.90.20.1
Percentage of Assets us-gaap:LandAndBuilding0.00.00.00.0

us-gaap:LeaseholdImprovements


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value25231816133.3872.983
Percentage of PropertyPlantAndEquipmentGross31.935.137.642.745.714.122.0
Percentage of Assets3.54.24.24.45.21.52.5
Percentage of Assets us-gaap:LeaseholdImprovements0.00.00.00.00.00.00.0

us-gaap:SoftwareDevelopment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value8.9498.9495.0721.6431.5140.9750.555
Percentage of PropertyPlantAndEquipmentGross11.213.510.44.35.14.14.1
Percentage of Assets1.21.61.20.40.60.40.5
Percentage of Assets us-gaap:SoftwareDevelopment0.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value352720149.2858.535.429
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.84.94.84.03.63.84.5

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value4.34.2614.5214.04.04.0183.9713.43.43.53.8013.83.83.83.5953.73.51.4930.4320.40.40.50.5610.60.50.50.3680.40.4
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AmortizationOfIntangibleAssets us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value3.2893.293.6763.4713.473.4713.3973.0493.053.1772.8162.8152.8162.8152.4232.4232.4180.8330.2590.2750.2760.2760.2750.291
Percentage of AmortizationOfIntangibleAssets76.577.281.386.886.886.485.589.789.790.874.174.174.174.167.465.569.155.860.068.869.055.249.048.5
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CustomerRelationships0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DevelopedTechnologyRights


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value0.8350.8360.7480.4570.4570.4570.5150.3090.3080.3090.9590.960.9560.9791.1261.2311.0830.6460.080.0990.0990.160.2260.229
Percentage of AmortizationOfIntangibleAssets19.419.616.511.411.411.413.09.19.18.825.225.325.225.831.333.330.943.318.524.824.832.040.338.2
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:DevelopedTechnologyRights0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TradeNames


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value0.1370.1350.0970.090.0910.090.0590.0210.0210.0210.0260.0260.0250.0260.0280.0280.0290.0140.0210.0320.0310.0320.0310.021
Percentage of AmortizationOfIntangibleAssets3.23.22.12.22.32.21.50.60.60.60.70.70.70.70.80.80.80.94.98.07.86.45.53.5
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:TradeNames0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value4445444240393832292927282625232322202017171715128.4098.13
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.84.06.16.16.16.36.96.55.96.16.36.66.66.66.36.26.36.27.77.07.27.46.85.47.16.7

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value1121121121051051041046363636363636363636464242424242424242118
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.810.115.415.115.916.818.812.712.613.314.414.915.816.717.117.018.019.19.59.910.210.510.911.120.717.70.0

us-gaap:Goodwill us-gaap:BusinessAcquisition

alrm:ShooterDetectionSystems


Goodwillus-gaap:
Period End2020-12-14
Value7.176
Percentage of Goodwill0.0
Percentage of Assets0.0
Percentage of Assets alrm:ShooterDetectionSystems0.0

us-gaap:Goodwill us-gaap:StatementBusinessSegments

alrm:Alarm.Com


Goodwillus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value1121121121051051041046363636363636363636464242424242424242118
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.810.115.415.115.916.818.812.712.613.314.414.915.816.717.117.018.019.19.59.910.210.510.911.120.717.70.0
Percentage of Assets alrm:Alarm.Com0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value94981039195991036872757982869094971011044.5684.955.3855.826.3186.8797.4415.0925.962
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.28.914.113.114.415.918.513.714.315.717.919.421.523.825.426.128.431.21.72.02.22.52.83.16.24.20.0

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:BalanceSheetLocation, us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:OtherAssets, us-gaap:Patents


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value1.82.02.22.22.41.81.92.12.22.32.41.61.71.81.92.5
Percentage of FiniteLivedIntangibleAssetsNet1.92.02.12.42.51.81.83.13.03.03.01.92.02.02.054.7
Percentage of Assets0.20.20.30.30.40.30.30.40.40.50.50.40.40.50.51.0
Percentage of Assets us-gaap:OtherAssets us-gaap:Patents0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherCurrentAssets, us-gaap:Patents


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value0.70.70.70.70.70.50.50.50.50.50.50.40.40.50.50.7
Percentage of FiniteLivedIntangibleAssetsNet0.70.70.70.80.70.50.50.70.70.70.60.50.50.60.515.3
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.3
Percentage of Assets us-gaap:OtherCurrentAssets us-gaap:Patents0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value6669727377808467717477808285889093953.3633.6223.8974.1734.4494.7245.0153.8534.571
Percentage of FiniteLivedIntangibleAssetsNet69.870.170.481.081.281.481.698.898.498.197.796.695.694.793.992.992.391.573.673.272.471.770.468.767.475.776.7
Percentage of Assets5.76.29.910.611.713.015.113.614.115.417.518.720.622.623.824.326.228.51.31.41.61.82.02.14.23.20.0
Percentage of Assets us-gaap:CustomerRelationships0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DevelopedTechnologyRights


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value262728151516160.7521.0611.3691.6782.6373.5974.5535.5326.6587.4888.5711.0481.1281.2271.3261.4861.7121.9410.9181.273
Percentage of FiniteLivedIntangibleAssetsNet28.027.727.316.916.716.516.31.11.51.82.13.24.25.05.96.87.48.222.922.822.822.823.524.926.118.021.4
Percentage of Assets2.32.53.92.22.42.63.00.20.20.30.40.60.91.21.51.82.12.60.40.50.50.60.70.81.60.80.0
Percentage of Assets us-gaap:DevelopedTechnologyRights0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Patents


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-10-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value2.52.72.92.93.12.32.42.62.72.82.91.12.02.12.32.42.62.83.03.23.42.2
Percentage of FiniteLivedIntangibleAssetsNet2.62.72.83.23.22.32.33.83.73.73.70.02.42.42.52.52.72.82.970.168.734.8
Percentage of Assets0.20.20.40.40.50.40.40.50.50.60.70.00.50.50.60.60.70.80.91.21.41.0
Percentage of Assets us-gaap:Patents0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TradeNames


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value2.0942.2312.3661.9512.0412.1322.2220.0620.0830.1040.1250.1510.1770.2020.2280.2560.2840.3130.1570.1780.210.2410.2730.3040.3250.0940.118
Percentage of FiniteLivedIntangibleAssetsNet2.22.32.32.12.12.12.10.10.10.10.20.20.20.20.20.30.30.33.43.63.94.14.34.44.41.82.0
Percentage of Assets0.20.20.30.30.30.30.40.00.00.00.00.00.00.10.10.10.10.10.10.10.10.10.10.10.30.10.0
Percentage of Assets us-gaap:TradeNames0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Deferred Tax Assets Liabilities Net

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:DeferredTaxAssetsLiabilitiesNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value21192818
Percentage of DeferredTaxAssetsLiabilitiesNet100.0100.0100.0100.0
Percentage of Assets3.03.46.65.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value3031333333343027272828
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.62.84.64.95.15.65.55.55.55.90.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value242218161718171714131312139.3097.9257.2977.4534.7914.8385.2263.9484.1116.6436.452119.371
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.12.12.52.42.62.93.13.52.82.83.12.93.32.42.11.92.11.41.92.11.61.72.92.910.17.7

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value5044383248383220222020192116172323201820211812171611
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.34.05.24.67.36.25.94.14.44.24.64.65.34.34.66.26.66.07.08.08.97.75.78.014.09.2

Accrued Liabilities Current

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AccruedLiabilitiesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value131111129.6498.204109.234353434357.5625.4294.3014.4275.4984.8535.2983.0343.5535.2294.2442.4983.4311.911
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.11.01.61.81.51.31.81.87.17.27.88.21.91.41.21.21.51.42.01.21.52.21.91.12.91.6

Contract With Customer Liability Current

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:ContractWithCustomerLiabilityCurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value6301000.05283000.04037000.04411000.03542000.04028000.03043000.03063000.03560000.03698000.03356000.03539000.03460000.03292000.0
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.50.60.60.50.60.50.60.70.80.80.80.90.9

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value10491908292777556837575734537444948413937353329333122
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.08.212.311.914.012.413.611.316.515.817.117.111.39.812.013.113.512.215.214.914.814.112.915.026.618.8

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value10109.9739.479.1988.8037.6836.6846.5496.2275.699
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.90.91.41.41.41.41.41.31.31.30.0

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value4861000.04463000.04315000.05154000.05482000.05893000.05616000.03510000.03303000.02056000.03459000.03116000.02824000.04677000.04973000.04935000.04728000.04214000.02207000.04473000.02221000.03296000.02219000.03826000.04099000.02143000.0
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.40.60.70.80.91.00.70.70.40.80.70.71.21.31.31.31.30.81.80.91.41.01.73.41.8

Long Term Debt

us-gaap:LongTermDebt us-gaap:DebtInstrument

us-gaap:LongTermDebt

alrm:ConvertibleSeniorNotesDue2026


Long
Period End2021-06-302021-03-31
Value416412
Percentage of LongTermDebt100.0100.0
Percentage of Assets36.037.0
Percentage of Assets alrm:ConvertibleSeniorNotesDue20260.00.0

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value1101111121136364656667686970717272736.76.76.76.76.76.76.76.7
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets15.015.916.918.111.312.812.913.815.215.917.118.419.119.220.422.02.62.72.82.83.03.05.65.5

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value8.557.4516.8117.7247.4267.8887.4891.8841.8541.62131313131314141213121111107.4873.2521.67
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.70.91.11.11.31.30.40.40.33.03.13.33.63.73.74.03.75.24.84.94.94.63.42.71.4

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value3335373838403735353636
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.93.25.25.55.86.56.77.07.07.60.0

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
Value9.9529.69109.831
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0100.0
Percentage of Assets0.90.91.41.4

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
Value8625000.08490000.09648000.09071000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0100.0100.0
Percentage of Assets0.70.81.31.3

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
Value7535000.07536000.08494000.08299000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0100.0100.0
Percentage of Assets0.70.71.21.2

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value7539000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets1.0

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value4443000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets0.6

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2021-06-302021-03-312020-12-312020-09-30
Value43454748
Percentage of OperatingLeaseLiability100.0100.0100.0100.0
Percentage of Assets3.84.16.56.9

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value47495252525450
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.14.57.17.68.08.79.0

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value3779000.04155000.04399000.04754000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0100.0
Percentage of Assets0.30.40.60.7

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312012-12-31
Value573548467438393366355336312292277264266250232229211198191184177174170165-134.295-121.844-140.69-147.051
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets49.649.263.962.859.358.763.867.161.860.962.961.966.165.862.661.459.359.173.273.673.474.075.274.3-112.6-100.80.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312012-12-31
Value4814714053923833733653593533463413363303243213183143113083043002992972960.07.1681.7770.0
Percentage of StockholdersEquity84.086.086.889.597.5101.9102.8106.8113.0118.6122.9127.0124.0129.8137.9138.5149.0157.2161.4165.3169.3171.6175.0178.8-0.0-5.9-1.3-0.0
Percentage of Assets41.742.355.556.357.959.865.571.769.972.377.478.781.985.586.485.088.492.9118.2121.7124.2126.9131.7132.90.05.90.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312012-12-31
Value0.50.4980.4960.4930.4910.4880.4870.4860.4850.4820.4810.480.4770.4730.4720.4710.4670.4630.4610.4590.4560.4560.4550.4540.0280.0260.0170.013
Percentage of StockholdersEquity0.10.10.10.10.10.10.10.10.20.20.20.20.20.20.20.20.20.20.20.20.30.30.30.3-0.0-0.0-0.0-0.0
Percentage of Assets0.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.20.20.20.20.20.20.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312012-12-31
Value9681665014-2.472-10.463-23.498-41.188-54.984-64.031-71.959-64.307-75.04-88.677-88.997-104.1-113.965-117.909-120.885-123.452-125.325-128.063-131.052-134.281-128.996-142.498-147.022
Percentage of StockholdersEquity16.814.814.211.53.7-0.7-2.9-7.0-13.2-18.8-23.1-27.2-24.2-30.0-38.1-38.7-49.3-57.4-61.7-65.6-69.5-71.8-75.3-79.0100.0105.9101.3100.0
Percentage of Assets8.37.39.17.22.2-0.4-1.9-4.7-8.1-11.5-14.5-16.8-16.0-19.7-23.9-23.8-29.2-34.0-45.1-48.3-51.0-53.1-56.6-58.7-112.6-106.70.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312012-12-31
Value-5.149-5.149-5.149-5.149-5.149-5.1490.00.00.00.00.00.0-0.042-0.042-0.042-0.042-0.042-0.042-0.042
Percentage of StockholdersEquity-0.9-0.9-1.1-1.2-1.3-1.40.00.00.00.00.00.0-0.0-0.0-0.00.00.00.00.0
Percentage of Assets-0.4-0.5-0.7-0.7-0.8-0.80.00.00.00.00.00.0-0.0-0.0-0.0-0.0-0.00.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value500000.0498000.0496000.0493000.0491000.0488000.0487000.0486000.0485000.0482000.0481000.0480000.0477000.0473000.0472000.0471000.0467000.0463000.0461000.0459000.0456000.0456000.0455000.0454000.028000.026000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.20.20.20.20.20.20.00.0

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value4814714053923833733653593533463413363303243213183143113083043002992972960.07.168
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0
Percentage of Assets41.742.355.556.357.959.865.571.769.972.377.478.781.985.586.485.088.492.9118.2121.7124.2126.9131.7132.90.05.9

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value9681665014-2.472-10.463-23.498-41.188-54.984-64.031-71.959-64.307-75.04-88.677-88.997-104.1-113.965-117.909-120.885-123.452-125.325-128.063-131.052-134.281-128.996
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.37.39.17.22.2-0.4-1.9-4.7-8.1-11.5-14.5-16.8-16.0-19.7-23.9-23.8-29.2-34.0-45.1-48.3-51.0-53.1-56.6-58.7-112.6-106.7

Treasury Stock Value

us-gaap:TreasuryStockValue

us-gaap:TreasuryStockValue


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312016-12-312016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value5149000.05149000.05149000.05149000.05149000.05149000.000042000.042000.042000.042000.042000.0
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.50.70.70.80.80.00.00.00.00.00.00.00.0

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

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value107.8887.4487.0956.3585.0345.4334.2673.4863.6312.7842.2791.9061.9151.3131.1211.0860.9420.8521.1490.809
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value107.8887.4487.0956.3585.0345.4334.2673.4863.6312.7842.2791.9061.9151.3131.1211.0860.9420.8521.1490.809
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value242135183512230.9824-1.1872519113.52181311128.6941.3250.5616.925.961134.2533.4639.147-0.127
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.712.321.411.724.88.516.60.819.8-1.123.117.711.23.821.015.313.717.512.52.00.911.710.524.98.27.520.1-0.3

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-3.309-9.067-32.5121-2.293-7.013-67.525124.654-23.023-4.06-3.186-3.084-3.047-5.8121.02-6.077-157.926-5.945-3.146-2.165-0.17-4.309-4.823-2.181-6.7360.544-4.304
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.8-5.3-19.613.6-1.6-4.6-48.19.83.8-20.5-3.6-2.8-3.0-3.3-6.51.1-7.1-212.9-8.5-4.6-3.4-0.3-7.6-8.9-4.2-14.61.2-10.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-0.2573763.3831.1851.2446-0.4340.012-0.2990.5910.1461.6960.561-0.004-1.1410.8950.076672.8352.707-0.0770.7370.10597-20.378-0.11-0.203-0.698
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.1218.32.00.70.930.4-0.30.0-0.20.50.11.50.5-0.0-1.31.00.190.94.14.0-0.11.20.2179.8-39.2-0.2-0.4-1.6

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value203886.283413452-44.6941328-23.61921189.1610.469
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.9225.33.826.024.134.3-31.810.523.4-21.019.616.38.80.5

Amortization Of Financing Costs

us-gaap:AmortizationOfFinancingCosts

us-gaap:AmortizationOfFinancingCosts


Amortization
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value27000.027000.027000.027000.027000.027000.027000.027000.027000.027000.027000.027000.027000.023000.024000.023000.024000.025000.028000.026000.027000.027000.026000.028000.027000.027000.0
Percentage of AmortizationOfFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfFinancingCosts us-gaap:DebtInstrument

alrm:ConvertibleSeniorNotesDue2026


Amortization
Period End2021-06-302021-03-31
Value557000.0432000.0
Percentage of AmortizationOfFinancingCosts0.00.0

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-3965000.0-3178000.0-1776000.01046000.0-3853000.01327000.01097000.02129000.0-762000.0135000.0-2374000.0-7770000.0-1542000.0204000.08848000.0-3527000.0-1710000.0-1123000.0-2489000.0-1342000.0-745000.0-253000.0-1392000.0-35000.0-1242000.0-883000.0-680000.0-413000.0
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value4.885.6852.9674.582-5.5158.0646.2695.0774.1746.753-5.8472.9959.1373.0130.569-0.6563.578-1.581.8441.9154.612.812-0.133-1.4047.2610.186-0.538-0.54
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories

us-gaap:IncreaseDecreaseInInventories


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value122.9473.438-9.029132.6738.503-2.917-1.8192.7246.0842.1881.828-1.2870.563.3542.974-3.553-0.9622.0521.8691.109-3.1021.3080.3751.041-0.4651.339
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value242135183512230.9824-1.1872519113.52181311128.6941.3250.5616.925.961134.2533.4639.147-0.127
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.712.321.411.724.88.516.60.819.8-1.123.117.711.23.821.015.313.717.512.52.00.911.710.524.98.27.520.1-0.3

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value14141536168.8071317139.017.928-7.65210100.32159.8653.9632.9762.5671.8732.7383.2753.2292.5093.0414.4862.6672.076
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.88.69.622.712.05.89.313.811.38.07.1-6.810.311.30.416.811.55.34.33.82.94.65.86.04.86.69.86.24.9

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value141436168.80717139.01-7.65210100.322.9762.5671.8732.7382.9893.229
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.091.3100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.88.622.712.05.813.811.38.0-6.810.311.30.44.33.82.94.65.36.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value14141535168.5711217139.01
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.78.49.422.611.75.69.113.811.38.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value107.8888.2757.4487.0956.3585.8825.0355.424.2663.7593.4573.5442.6692.2791.9061.9151.3131.1211.0860.9420.8521.1490.8090.8280.5610.9020.746
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-3.309-9.067-32.5121-2.293-7.013-67.525124.654-23.023-4.06-3.186-3.084-3.047-5.8121.02-6.077-157.926-5.945-3.146-2.165-0.17-4.309-4.823-2.181-6.7360.544-4.304
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.8-5.3-19.613.6-1.6-4.6-48.19.83.8-20.5-3.6-2.8-3.0-3.3-6.51.1-7.1-212.9-8.5-4.6-3.4-0.3-7.6-8.9-4.2-14.61.2-10.0

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value3.3124.0695.4643.5613.3973.7198.6644.9522.7462.9621.6983.1863.0843.0472.8121.9383.0772.6372.9451.5462.0262.5383.8274.5080.9861.0260.7423.856
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment us-gaap:StatementBusinessSegments

alrm:Alarm.Com


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2.73.55.1999999999999984.73.92.67.14.71.52.31.63.93.23.02.12.23.21.8
Percentage of PaymentsToAcquirePropertyPlantAndEquipment81.586.095.2132.0114.869.981.994.954.677.794.2122.4103.898.574.7113.5104.068.3

us-gaap:AllOtherSegments


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.10.10.10.10.10.80.60.10.10.00.00.10.10.10.00.10.10.0
Percentage of PaymentsToAcquirePropertyPlantAndEquipment3.02.51.82.82.921.56.92.03.60.00.03.13.23.30.05.23.20.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-0.2573763.3831.1851.2446-0.4340.012-0.2990.5910.1461.6960.561-0.004-1.1410.8950.076672.8352.707-0.0770.7370.10597-20.378-0.11-0.203-0.698
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.1218.32.00.70.930.4-0.30.0-0.20.50.11.50.5-0.0-1.31.00.190.94.14.0-0.11.20.2179.8-39.2-0.2-0.4-1.6

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302016-12-312016-09-302015-12-312015-09-302014-12-312014-09-30
Value0005149000.000000007000.0-1000.03000.0004000.00
Percentage of PaymentsForRepurchaseOfCommonStock0.00.00.0100.00.00.00.00.00.00.00.0100.0100.0100.00.00.0100.00.0

Debt Instrument Interest Rate Stated Percentage

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyType, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:SubsequentEventType

us-gaap:DebtInstrumentInterestRateStatedPercentage

alrm:ServiceProvider, us-gaap:NotesReceivable, us-gaap:SubsequentEvent


Debt
Period End2020-07-31
Value0.09
Percentage of DebtInstrumentInterestRateStatedPercentage100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations alrm:ServiceProvider us-gaap:NotesReceivable us-gaap:SubsequentEvent0.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value-13.6-25.0-3.815.4-0.1590.1230.0170.140.0220.0262.4310.542-0.3120.1030.543-0.498-0.8410.1210.0040.1220.3430.368-0.0260.2470.3990.403-0.0090.1560.408
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice


Share
Period End2020-12-312019-12-312018-12-312017-12-312017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value25.7520.615.3710.679.347.446.916.235.895.444.174.093.932.68
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice us-gaap:BusinessAcquisition

alrm:Connect


Share
Period End2020-12-312019-12-312018-12-312017-12-312017-06-302017-03-312016-12-31
Value6.097.266.615.885.575.480
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice23.735.243.055.159.673.70.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-31
Value413733
Percentage of DeferredTaxAssetsNet100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value4228000.03065000.02801000.01973000.0681000.0506000.0208000.000
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.00.00.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312014-12-31
Value1568000.0300000.0300000.0300000.0300000.0300000.0300000.000000000000000
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

alrm:AccountsAndNotesReceivableCreditLossExpenseReversal

alrm:AccountsAndNotesReceivableCreditLossExpenseReversal


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value100000.0-100000.02400000.0-1200000.0-900000.01400000.0
Percentage of AccountsAndNotesReceivableCreditLossExpenseReversal100.0100.0100.0100.0100.0100.0

alrm:AccountsReceivableCreditLossExpenseReversalLessThanAmount

alrm:AccountsReceivableCreditLossExpenseReversalLessThanAmount


Accounts
Period End2021-03-31
Value100000.0
Percentage of AccountsReceivableCreditLossExpenseReversalLessThanAmount100.0

alrm:AdjustmentsToAdditionalPaidInCapitalAccretionAdjustmentsOfRedeemableNoncontrollingInterestToRedemptionValue

alrm:AdjustmentsToAdditionalPaidInCapitalAccretionAdjustmentsOfRedeemableNoncontrollingInterestToRedemptionValue


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-30
Value743000.0473000.0254000.0112000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalAccretionAdjustmentsOfRedeemableNoncontrollingInterestToRedemptionValue100.0100.0100.0100.0

alrm:AdjustmentsToAdditionalPaidInCapitalAccretionAdjustmentsOfRedeemableNoncontrollingInterestToRedemptionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-30
Value743000.0473000.0254000.0112000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalAccretionAdjustmentsOfRedeemableNoncontrollingInterestToRedemptionValue100.0100.0100.0100.0

alrm:ContractWithCustomerAssetCommissionCostsandUpfrontPaymentsToACustomerCapitalizedDuringPeriod

alrm:ContractWithCustomerAssetCommissionCostsandUpfrontPaymentsToACustomerCapitalizedDuringPeriod


Contract
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
Value1051000.01106000.0833000.0607000.0657000.01165000.01703000.0333000.01389000.0716000.0520000.0489000.0412000.0
Percentage of ContractWithCustomerAssetCommissionCostsandUpfrontPaymentsToACustomerCapitalizedDuringPeriod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

alrm:ContractWithCustomerLiabilityRevenueDeferredDuringPeriod

alrm:ContractWithCustomerLiabilityRevenueDeferredDuringPeriod


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value3.6483.8013.1293.4252.1733.523.1140.5420.9161.5551.2481.2250.8910.591.9711.025
Percentage of ContractWithCustomerLiabilityRevenueDeferredDuringPeriod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

alrm:ContractWithCustomerProvisionForProductReturns

alrm:ContractWithCustomerProvisionForProductReturns


Contract
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
Value555000.0574000.0304000.0491000.0709000.0291000.0-18000.0-61000.076000.0-120000.063000.036000.0174000.00323000.0588000.0
Percentage of ContractWithCustomerProvisionForProductReturns100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

alrm:ContractWithCustomerProvisionForProductReturns us-gaap:IncomeStatementLocation

alrm:HardwareandOtherRevenue


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value500000.0600000.0300000.0500000.0700000.0300000.0-200000.0100000.0100000.0-100000.0100000.0100000.0200000.00400000.0600000.0600000.0
Percentage of ContractWithCustomerProvisionForProductReturns90.1104.598.7101.898.7103.11111.1-163.9131.683.3158.7277.8114.90.0123.8102.00.0

alrm:DebtInstrumentInterestRateTermsLeverageRatio alrm:VariableRateComponent, us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:VariableRate

alrm:DebtInstrumentInterestRateTermsLeverageRatio

alrm:ScenarioOneLeverageRatio, us-gaap:RevolvingCreditFacility, alrm:TwoThousandSeventeenFacility, us-gaap:LineOfCredit, us-gaap:LondonInterbankOfferedRateLIBOR


Debt
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
Value01.001.01.01.001.01.01.001.01.01.0
Percentage of DebtInstrumentInterestRateTermsLeverageRatio0.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0

alrm:DebtInstrumentInterestRateTermsLeverageRatio alrm:VariableRateComponent, us-gaap:Range, us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:VariableRate

alrm:ScenarioFourLeverageRatio, srt:Maximum, us-gaap:RevolvingCreditFacility, alrm:TwoThousandSeventeenFacility, us-gaap:LineOfCredit, us-gaap:LondonInterbankOfferedRateLIBOR


Debt
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
Value03.003.03.03.003.03.03.003.03.0
Percentage of DebtInstrumentInterestRateTermsLeverageRatio0.0300.00.0300.0300.0300.00.0300.0300.0300.00.0300.0300.0

alrm:ScenarioThreeLeverageRatio, srt:Maximum, us-gaap:RevolvingCreditFacility, alrm:TwoThousandSeventeenFacility, us-gaap:LineOfCredit, us-gaap:LondonInterbankOfferedRateLIBOR


Debt
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
Value03.003.03.03.003.03.03.003.03.0
Percentage of DebtInstrumentInterestRateTermsLeverageRatio0.0300.00.0300.0300.0300.00.0300.0300.0300.00.0300.0300.0

alrm:ScenarioThreeLeverageRatio, srt:Minimum, us-gaap:RevolvingCreditFacility, alrm:TwoThousandSeventeenFacility, us-gaap:LineOfCredit, us-gaap:LondonInterbankOfferedRateLIBOR


Debt
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
Value02.002.02.02.002.02.02.002.02.0
Percentage of DebtInstrumentInterestRateTermsLeverageRatio0.0200.00.0200.0200.0200.00.0200.0200.0200.00.0200.0200.0

alrm:ScenarioTwoLeverageRatio, srt:Maximum, us-gaap:RevolvingCreditFacility, alrm:TwoThousandSeventeenFacility, us-gaap:LineOfCredit, us-gaap:LondonInterbankOfferedRateLIBOR


Debt
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
Value02.002.02.02.002.02.02.002.02.0
Percentage of DebtInstrumentInterestRateTermsLeverageRatio0.0200.00.0200.0200.0200.00.0200.0200.0200.00.0200.0200.0

alrm:ScenarioTwoLeverageRatio, srt:Minimum, us-gaap:RevolvingCreditFacility, alrm:TwoThousandSeventeenFacility, us-gaap:LineOfCredit, us-gaap:LondonInterbankOfferedRateLIBOR


Debt
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
Value01.001.01.01.001.01.01.001.01.0
Percentage of DebtInstrumentInterestRateTermsLeverageRatio0.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0

alrm:EquitySecuritiesWithoutReadilyDeterminableFairValueGainLossOnSale us-gaap:ConsolidatedEntities, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementClassOfStock

alrm:EquitySecuritiesWithoutReadilyDeterminableFairValueGainLossOnSale

us-gaap:VariableInterestEntityNotPrimaryBeneficiary, alrm:PlatformPartner, us-gaap:CommonStock


Equity
Period End2020-12-312020-09-30
Value0.024
Percentage of EquitySecuritiesWithoutReadilyDeterminableFairValueGainLossOnSale0.0100.0

alrm:IncreaseDecreaseInOperatingLeaseLiabilities

alrm:IncreaseDecreaseInOperatingLeaseLiabilities


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-2772000.0-2750000.0-2699000.0-2469000.0-2259000.0-2129000.0-5535000.01304000.0-1908000.0
Percentage of IncreaseDecreaseInOperatingLeaseLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0

alrm:IncreaseDecreaseinAccountsPayableAccruedLiabilitiesandOtherCurrentLiabilities

alrm:IncreaseDecreaseinAccountsPayableAccruedLiabilitiesandOtherCurrentLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value13-0.227.884-11.435170.08311-20.3556.856-9.462.143278.111-7.001-4.2010.3737.1190.4831.1562.0343.6073.661-4.4923.0916.9980.369-0.401-4.541
Percentage of IncreaseDecreaseinAccountsPayableAccruedLiabilitiesandOtherCurrentLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

alrm:LineofCreditFacilityCovenantTermsFixedChargeCoverageRatioMinimum us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

alrm:LineofCreditFacilityCovenantTermsFixedChargeCoverageRatioMinimum

us-gaap:RevolvingCreditFacility, alrm:TwoThousandSeventeenFacility, us-gaap:LineOfCredit


Lineof
Period End2020-12-31
Value0
Percentage of LineofCreditFacilityCovenantTermsFixedChargeCoverageRatioMinimum0.0

alrm:OperatingLeaseRightOfUseAssetAmortization

alrm:OperatingLeaseRightOfUseAssetAmortization


Operating
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value2357000.02338000.02328000.02189000.02045000.01932000.01835000.01803000.0
Percentage of OperatingLeaseRightOfUseAssetAmortization100.0100.0100.0100.0100.0100.0100.0100.0

alrm:PaymentstoAcquireBusinessesNetOfWorkingCapitalAdjustment us-gaap:BusinessAcquisition

alrm:PaymentstoAcquireBusinessesNetOfWorkingCapitalAdjustment

alrm:ShooterDetectionSystems


Paymentsto
Period End2020-12-14
Value26
Percentage of PaymentstoAcquireBusinessesNetOfWorkingCapitalAdjustment100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt

us-gaap:AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt


Adjustments
Period End2021-03-31
Value56
Percentage of AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-03-31
Value56
Percentage of AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs us-gaap:ConsolidatedEntities

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs

alrm:ParentCompanyAndCertainSubsidiaries


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value338000.0808000.096000.0170000.070000.043000.0
Percentage of AllowanceForDoubtfulAccountsReceivableWriteOffs100.0100.0100.0100.0100.0100.0

alrm:RemainingSubsidiaries


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value118000.08000.07000.016000.011000.04000.0
Percentage of AllowanceForDoubtfulAccountsReceivableWriteOffs34.91.07.39.415.79.3

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs us-gaap:CounterpartyName

alrm:DistributionPartnerAcquiredByThirdParty


Allowance
Period End2021-06-302021-03-31
Value0700000.0
Percentage of AllowanceForDoubtfulAccountsReceivableWriteOffs0.086.6

us-gaap:AmortizationOfDebtDiscountPremium us-gaap:DebtInstrument

us-gaap:AmortizationOfDebtDiscountPremium

alrm:ConvertibleSeniorNotesDue2026


Amortization
Period End2021-06-302021-03-31
Value3592000.02812000.0
Percentage of AmortizationOfDebtDiscountPremium100.0100.0

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AmortizationOfFinancingCostsAndDiscounts


Amortization
Period End2021-06-302021-03-312020-06-302020-03-31
Value4149000.03250000.027000.027000.0
Percentage of AmortizationOfFinancingCostsAndDiscounts100.0100.0100.0100.0

us-gaap:BusinessCombinationConsiderationTransferred1 us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationConsiderationTransferred1

alrm:ShooterDetectionSystems


Business
Period End2020-12-14
Value26
Percentage of BusinessCombinationConsiderationTransferred1100.0

us-gaap:BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1

us-gaap:BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1


Business
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-2000.0-304000.0-1721000.0-568000.0000000-4000.0-36000.0-130000.0-60000.0-650000.0110000.070000.0000
Percentage of BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1100.0100.0100.0100.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 us-gaap:BusinessAcquisition

alrm:OpenEye


Business
Period End2020-09-302020-06-302020-03-31
Value-300000.0-1700000.0-600000.0
Percentage of BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability198.798.8105.6

us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred

alrm:ShooterDetectionSystems


Business
Period End2021-06-302020-12-14
Value100000.0-100000.0
Percentage of BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred100.0100.0

us-gaap:CapitalizedContractCostAmortization

us-gaap:CapitalizedContractCostAmortization


Capitalized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value883000.0809000.0806000.01046000.0871000.0811000.0694000.0613000.0623000.0514000.0517000.0490000.0486000.0490000.0
Percentage of CapitalizedContractCostAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedContractCostAmortization us-gaap:CapitalizedContractCost

alrm:Commission


Capitalized
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value800000.01000000.0900000.0800000.0600000.0600000.0600000.0500000.0500000.0500000.0500000.0500000.00000
Percentage of CapitalizedContractCostAmortization99.395.6103.398.686.597.996.397.396.7102.0102.9102.00.00.00.00.0

us-gaap:ConcentrationRiskPercentage1 us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType, us-gaap:StatementBusinessSegments

us-gaap:ConcentrationRiskPercentage1

us-gaap:SalesRevenueNet, alrm:SegmentConcentrationRisk, alrm:Alarm.Com


Concentration
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-30
Value95.095.094.00.940.950.940.930.930.930.930.950.940.940.940.940.950.940.970.970.970.970.97
Percentage of ConcentrationRiskPercentage1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

alrm:TenLargestServiceProviders, us-gaap:SalesRevenueNet, us-gaap:CustomerConcentrationRisk


Concentration
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value48.050.050.00.460.490.520.510.530.570.570.590.60.61
Percentage of ConcentrationRiskPercentage150.552.653.248.951.655.354.857.061.361.362.163.864.9

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

alrm:ServiceProviderA, srt:Maximum, us-gaap:SalesRevenueNet, us-gaap:CustomerConcentrationRisk


Concentration
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-03-312017-09-302017-06-30
Value15.020.020.00.20.220.00.20.20.150.150.15
Percentage of ConcentrationRiskPercentage115.821.121.321.321.12127.721.521.515.816.016.0

alrm:ServiceProviderA, srt:Minimum, us-gaap:SalesRevenueNet, us-gaap:CustomerConcentrationRisk


Concentration
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-03-312017-09-302017-06-30
Value10.015.015.00.150.1515.00.150.150.10.10.1
Percentage of ConcentrationRiskPercentage110.515.816.016.015.81595.716.116.110.510.610.6

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:ContractWithCustomerLiabilityRevenueRecognized


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2.2852.6743.4722.092.7381.9162.6391.4991.4721.1951.9461.3221.0531.1352.5821.971.307
Percentage of ContractWithCustomerLiabilityRevenueRecognized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CostOfGoodsAndServicesSoldAmortization

us-gaap:CostOfGoodsAndServicesSoldAmortization


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value315000.0288000.0278000.0203000.0202000.0199000.0194000.0172000.0167000.0167000.0199000.0189000.0276000.0236000.0148000.0243000.0
Percentage of CostOfGoodsAndServicesSoldAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CostOfGoodsAndServicesSoldAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:IncomeStatementLocation

us-gaap:Patents, alrm:CostofSaaSandLicenseRevenue


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0200000.0200000.0100000.0200000.0200000.0
Percentage of CostOfGoodsAndServicesSoldAmortization31.734.736.049.349.550.351.558.159.959.950.352.972.584.767.682.30.0

us-gaap:Patents, alrm:DepreciationDepletionandAmortizationNonproduction


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
Value100000.0100000.00100000.0100000.0100000.00100000.0100000.0100000.0100000.0000
Percentage of CostOfGoodsAndServicesSoldAmortization31.734.70.049.349.550.30.058.159.959.950.30.00.00.0

us-gaap:DebtInstrumentConvertibleConversionRatio1 us-gaap:DebtInstrument

us-gaap:DebtInstrumentConvertibleConversionRatio1

alrm:ConvertibleSeniorNotesDue2026


Debt
Period End2021-01-20
Value6.7939
Percentage of DebtInstrumentConvertibleConversionRatio1100.0

us-gaap:DebtInstrumentConvertibleConversionRatio1 us-gaap:DebtInstrument, us-gaap:SubsequentEventType

alrm:ConvertibleSeniorNotesDue2026, us-gaap:SubsequentEvent


Debt
Period End2021-01-20
Value6.7939
Percentage of DebtInstrumentConvertibleConversionRatio1100.0

us-gaap:DepreciationAndAmortization

us-gaap:DepreciationAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value7.4777.3857.4976.8786.7236.4226.3015.4675.1385.2285.5675.8915.2385.0254.9535.0714.8462.8641.6271.6591.6131.5911.4381.5041.5281.3381.2771.0580.85
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAndAmortization us-gaap:StatementBusinessSegments

alrm:Alarm.Com


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value7.47.37.46.76.76.46.35.55.15.25.55.85.24.94.85.04.82.8
Percentage of DepreciationAndAmortization99.098.898.797.499.799.7100.0100.699.399.598.898.599.397.596.998.699.197.8

us-gaap:AllOtherSegments


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.10.10.10.10.10.10.00.10.10.10.10.10.10.10.10.10.10.1
Percentage of DepreciationAndAmortization1.31.41.31.51.51.60.01.81.91.91.81.71.92.02.02.02.13.5

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value3.122.564.3539999999999991.6581.610.5781.150.5652.1711.3140.6822.9583.4920.4491.0556.0594.3691.2172.322.2210.1650.2940.0350.4240.396-0.1550.125-0.0730.057
Percentage of EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings us-gaap:FairValueByLiabilityClass

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings

alrm:ContingentConsiderationLiabilityFromAcquisitions


Fair
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value2000.0304000.01721000.0568000.000
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings100.0100.0100.0100.00.00.0

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs

us-gaap:LoansReceivable


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value01000.000
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs0.0100.00.00.0

us-gaap:FinitelivedIntangibleAssetsAcquired1 us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FinitelivedIntangibleAssetsAcquired1

us-gaap:Patents


Finitelived
Period End2020-10-312020-04-30
Value0.20.9
Percentage of FinitelivedIntangibleAssetsAcquired1100.0100.0

us-gaap:FinitelivedIntangibleAssetsAcquired1 us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:SubsequentEventType

us-gaap:Patents, us-gaap:SubsequentEvent


Finitelived
Period End2020-10-312020-04-30
Value0.20.9
Percentage of FinitelivedIntangibleAssetsAcquired1100.0100.0

us-gaap:GainOnSaleOfInvestments

us-gaap:GainOnSaleOfInvestments


Gain
Period End2020-12-31
Value0.0
Percentage of GainOnSaleOfInvestments0.0

us-gaap:GoodwillAcquiredDuringPeriod us-gaap:BusinessAcquisition

us-gaap:GoodwillAcquiredDuringPeriod

alrm:ShooterDetectionSystems


Goodwill
Period End2020-12-14
Value7.2
Percentage of GoodwillAcquiredDuringPeriod100.0

us-gaap:GoodwillPurchaseAccountingAdjustments us-gaap:BusinessAcquisition

us-gaap:GoodwillPurchaseAccountingAdjustments

alrm:ShooterDetectionSystems


Goodwill
Period End2021-06-30
Value100000.0
Percentage of GoodwillPurchaseAccountingAdjustments100.0

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInContractWithCustomerLiability


Increase
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value1363000.01127000.01335000.0-565000.01604000.0-957000.0-556000.0360000.0-97000.0-162000.0-545000.02000.0
Percentage of IncreaseDecreaseInContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherNoncurrentLiabilities

us-gaap:IncreaseDecreaseInOtherNoncurrentLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value103000.0162000.0-415000.058000.0-898000.0812000.0215000.030000.0852000.0-694000.0-317000.0-957000.0-150000.0-334000.0-123000.0-198000.01701000.0-1066000.01424000.0224000.0501000.01076000.03647000.03944000.0387000.0453000.0-308000.0350000.0
Percentage of IncreaseDecreaseInOtherNoncurrentLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value6397000.01734000.0-2866000.02279000.0-2838000.06108000.0-3926000.02104000.02342000.02367000.0-5187000.0-4420000.03929000.05563000.0-5580000.02697000.06093000.0-668000.0-2219000.01546000.01709000.0-199000.0821000.0733000.0-71000.01242000.0-835000.0420000.0
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements


Incremental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value1945400.02177600.0181440.01972300.01759400.01521400.0-31039.01634800.01895300.02000600.0-40547.002057800.02041900.0-82003.02373400.02558200.02533300.032799.02603000.01921100.01777800.001909600.001536000.032462.01916200.01389600.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0

us-gaap:InterestIncomeOther

us-gaap:InterestIncomeOther


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value149000.0157000.0136000.0118000.0157000.0459000.0605000.02703000.0806000.0808000.0830000.0661000.0
Percentage of InterestIncomeOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryWriteDown

us-gaap:InventoryWriteDown


Inventory
Period End2020-12-312019-12-31
Value273000.0470000.0
Percentage of InventoryWriteDown100.0100.0

us-gaap:LineOfCreditFacilityInterestRateDuringPeriod us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LineOfCreditFacilityInterestRateDuringPeriod

us-gaap:RevolvingCreditFacility, alrm:TwoThousandSeventeenFacility, us-gaap:LineOfCredit


Line
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-0.272.8858-0.00370.0379-0.0016-0.0017-0.0010.04880.00080.00050.00230.0377-0.0094-0.00270.01520.0313
Percentage of LineOfCreditFacilityInterestRateDuringPeriod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NetIncomeLossAttributableToRedeemableNoncontrollingInterest

us-gaap:NetIncomeLossAttributableToRedeemableNoncontrollingInterest


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-255000.0-280000.0-328000.0-259000.0-370000.0-236000.0
Percentage of NetIncomeLossAttributableToRedeemableNoncontrollingInterest100.0100.0100.0100.0100.0100.0

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
Value2357000.02338000.02326000.02329000.02188000.02045000.02030000.01932000.01835000.01803000.0
Percentage of OperatingLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseExpense us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:OperatingLeaseExpense

alrm:OpenEye


Operating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value100000.0100000.0100000.0100000.0100000.000
Percentage of OperatingLeaseExpense100.0100.0100.0100.0100.00.00.0

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
Value2.9052.7722.752.6992.4692.2592.1292.2112.021.908
Percentage of OperatingLeasePayments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentForContingentConsiderationLiabilityFinancingActivities

us-gaap:PaymentForContingentConsiderationLiabilityFinancingActivities


Payment
Period End2021-06-302021-03-312020-12-312020-09-302017-12-312017-09-302016-12-312016-09-30
Value728000.0150000.0719000.00000200000.0
Percentage of PaymentForContingentConsiderationLiabilityFinancingActivities100.0100.0100.00.00.00.00.0100.0

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDebtIssuanceCosts


Payments
Period End2021-06-302021-03-312017-12-312016-12-312015-12-31
Value0.407150.4380.00.0
Percentage of PaymentsOfDebtIssuanceCosts100.0100.0100.00.00.0

us-gaap:PaymentsToAcquireBusinessesGross us-gaap:BusinessAcquisition

us-gaap:PaymentsToAcquireBusinessesGross

alrm:ShooterDetectionSystems


Payments
Period End2020-12-14
Value26
Percentage of PaymentsToAcquireBusinessesGross100.0

us-gaap:PaymentsToAcquireInProcessResearchAndDevelopment

us-gaap:PaymentsToAcquireInProcessResearchAndDevelopment


Payments
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value003297000.00850000.0000
Percentage of PaymentsToAcquireInProcessResearchAndDevelopment0.00.0100.00.0100.00.00.00.0

us-gaap:PaymentsToAcquireIntangibleAssets

us-gaap:PaymentsToAcquireIntangibleAssets


Payments
Period End2020-12-312020-09-302017-12-312016-12-312016-09-302015-12-312015-09-302014-12-312014-09-30
Value150000.00001600000.00000
Percentage of PaymentsToAcquireIntangibleAssets100.00.00.00.0100.00.00.00.00.0

us-gaap:PaymentsToAcquireNotesReceivable

us-gaap:PaymentsToAcquireNotesReceivable


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0.60.60.00.00.0296.0130.0201.2870.00.00.03.01.03.01.03.00.00.00.0730.0890.0980.1210.0980.0680.453
Percentage of PaymentsToAcquireNotesReceivable100.0100.00.00.0100.0100.00.0100.0100.00.00.00.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireNotesReceivable us-gaap:AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyType, us-gaap:SubsequentEventType

alrm:ServiceProvider, us-gaap:SubsequentEvent


Payments
Period End2020-08-05
Value0.2
Percentage of PaymentsToAcquireNotesReceivable0.0

us-gaap:PaymentsToAcquireProjects

us-gaap:PaymentsToAcquireProjects


Payments
Period End2021-06-302021-03-31
Value05000000.0
Percentage of PaymentsToAcquireProjects0.0100.0

us-gaap:PaymentsToAcquireProjects us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

alrm:TechnologyPartner


Payments
Period End2021-02-282016-12-31
Value5000000.0300000.0
Percentage of PaymentsToAcquireProjects0.00.0

us-gaap:PaymentsToAcquireProjects us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:SubsequentEventType

alrm:TechnologyPartner, us-gaap:SubsequentEvent


Payments
Period End2021-02-25
Value5000000.0
Percentage of PaymentsToAcquireProjects0.0

us-gaap:ProceedsFromCollectionOfNotesReceivable

us-gaap:ProceedsFromCollectionOfNotesReceivable


Proceeds
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value0.0030.0020.0162.0040.003247.40.00.0
Percentage of ProceedsFromCollectionOfNotesReceivable100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:ProceedsFromIssuanceOfSecuredDebt

us-gaap:ProceedsFromIssuanceOfSecuredDebt


Proceeds
Period End2021-06-302021-03-31
Value0.0500
Percentage of ProceedsFromIssuanceOfSecuredDebt0.0100.0

us-gaap:ProceedsFromIssuanceOfSecuredDebt us-gaap:DebtInstrument

alrm:ConvertibleSeniorNotesDue2026


Proceeds
Period End2021-01-20
Value484
Percentage of ProceedsFromIssuanceOfSecuredDebt0.0

us-gaap:ProceedsFromIssuanceOfSecuredDebt us-gaap:DebtInstrument, us-gaap:SubsequentEventType

alrm:ConvertibleSeniorNotesDue2026, us-gaap:SubsequentEvent


Proceeds
Period End2021-01-20
Value484
Percentage of ProceedsFromIssuanceOfSecuredDebt0.0

us-gaap:ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions

us-gaap:ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0.8781.9895.1022.1853.0591.3650.5661.0120.7011.5911.1462.6961.5620.9960.2971.6021.0780.4730.4590.7750.0560.3710.0440.1160.1720.0120.0240.046
Percentage of ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProceedsFromLinesOfCredit


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0.00.00.0500.00.00.00.00.00.0720.00.0670.00.0
Percentage of ProceedsFromLinesOfCredit0.00.00.0100.00.00.00.00.00.00.0100.00.00.0100.00.00.0

us-gaap:ProceedsFromSaleOfInvestmentProjects

us-gaap:ProceedsFromSaleOfInvestmentProjects


Proceeds
Period End2020-12-31
Value0.0
Percentage of ProceedsFromSaleOfInvestmentProjects0.0

us-gaap:ProceedsFromSaleOfInvestmentProjects us-gaap:ConsolidatedEntities, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementClassOfStock

us-gaap:VariableInterestEntityNotPrimaryBeneficiary, alrm:PlatformPartner, us-gaap:CommonStock


Proceeds
Period End2020-07-31
Value25
Percentage of ProceedsFromSaleOfInvestmentProjects0.0

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:ProvisionForDoubtfulAccounts


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value100000.032000.02399000.0-1200000.0-900000.01885000.0448000.0200000.0200000.0260000.00100000.0100000.013000.0900000.0-400000.0100000.0128000.0200000.0200000.0100000.0200000.0-144000.00100000.0288000.0462000.0400000.0300000.0
Percentage of ProvisionForDoubtfulAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForDoubtfulAccounts us-gaap:ConsolidatedEntities

alrm:ParentCompanyAndCertainSubsidiaries


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value111000.036000.02304000.0-1146000.0-935000.01886000.0
Percentage of ProvisionForDoubtfulAccounts111.0112.596.095.5103.9100.1

alrm:RemainingSubsidiaries


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value7000.0-4000.095000.0-56000.015000.0-1000.0
Percentage of ProvisionForDoubtfulAccounts7.0-12.54.04.7-1.7-0.1

us-gaap:ProvisionForLoanLossesExpensed

us-gaap:ProvisionForLoanLossesExpensed


Provision
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
Value0-11000.09000.014000.0-33000.0-349000.047000.00-3319000.003319000.00
Percentage of ProvisionForLoanLossesExpensed0.0100.0100.0100.0100.0100.0100.00.0100.00.0100.00.0

us-gaap:ProvisionForLoanLossesExpensed us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:FinanceReceivables


Provision
Period End2021-06-302021-03-312020-09-302020-06-302020-03-31
Value-1000.0-11000.0-6000.08000.0-2000.0
Percentage of ProvisionForLoanLossesExpensed0.0100.0-42.9-24.20.6

us-gaap:LoansReceivable


Provision
Period End2021-06-302020-12-312020-09-302020-06-302020-03-31
Value1000.08000.020000.0-41000.0-347000.0
Percentage of ProvisionForLoanLossesExpensed0.088.9142.9124.299.4

us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:IncomeStatementLocation, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty

alrm:InstallationPartner, alrm:CostofHardwareandOtherRevenue, us-gaap:EquityMethodInvestee


Related
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0200000.0
Percentage of RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfLinesOfCredit

us-gaap:RepaymentsOfLinesOfCredit


Repayments
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
Value0.01101.01.01.00.01.01.01.01.01.01.01.01.0730.71.00.00.00.0
Percentage of RepaymentsOfLinesOfCredit0.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:RepaymentsOfLinesOfCredit us-gaap:CreditFacility, us-gaap:DebtInstrument

us-gaap:RevolvingCreditFacility, alrm:TwoThousandSeventeenFacility


Repayments
Period End2021-01-202021-03-312020-09-302020-06-302019-09-302019-06-302019-03-31
Value1101101.01.01.01.01.0
Percentage of RepaymentsOfLinesOfCredit100.00.0100.0100.0100.0100.0100.0

us-gaap:ResearchAndDevelopmentInProcess

us-gaap:ResearchAndDevelopmentInProcess


Research
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value0003297000.00850000.0000
Percentage of ResearchAndDevelopmentInProcess0.00.00.0100.00.0100.00.00.00.0

us-gaap:ResearchAndDevelopmentInProcess us-gaap:AssetAcquisition

alrm:IPRD


Research
Period End2021-04-302020-03-312020-03-122019-12-31
Value700000.02100000.01200000.0100000.0
Percentage of ResearchAndDevelopmentInProcess0.063.70.00.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability


Right
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.7910.2241.4281.9980.6256.0224.5021.1330.7921.459
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value237000.0173000.0185000.0263000.0107000.090000.0232000.0147000.0306000.0397000.086000.0
Percentage of StockIssuedDuringPeriodSharesShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value0.8781.9892.1853.0591.3651.0120.7011.5912.6961.5620.9960.2971.6021.0780.4730.4590.7750.0560.3710.0440.116
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value0.8761.9872.1833.0561.3641.0110.6981.592.6931.5580.9950.2961.5971.0740.4720.4570.7730.0560.370.0440.115
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation99.899.999.999.999.999.999.699.999.999.799.999.799.799.699.899.699.7100.099.7100.099.1

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value0.0020.0020.0020.0030.0010.0010.0030.0010.0030.0040.0010.0010.0050.0040.0010.0020.0020.00.0010.00.001
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation0.20.10.10.10.10.10.40.10.10.30.10.30.30.40.20.40.30.00.30.00.9

us-gaap:TemporaryEquityAccretionToRedemptionValueAdjustment

us-gaap:TemporaryEquityAccretionToRedemptionValueAdjustment


Temporary
Period End2021-06-302021-03-312020-09-302020-06-30
Value743000.0473000.0254000.0112000.0
Percentage of TemporaryEquityAccretionToRedemptionValueAdjustment100.0100.0100.0100.0

us-gaap:TemporaryEquityNetIncome

us-gaap:TemporaryEquityNetIncome


Temporary
Period End2021-06-302021-03-312020-09-302020-06-302020-03-31
Value-255000.0-280000.0-259000.0-370000.0-236000.0
Percentage of TemporaryEquityNetIncome100.0100.0100.0100.0100.0

us-gaap:UnrecognizedTaxBenefitsPeriodIncreaseDecrease us-gaap:TaxCreditCarryforward

us-gaap:UnrecognizedTaxBenefitsPeriodIncreaseDecrease

us-gaap:Research


Unrecognized
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
Value1000000.0500000.00-800000.01600000.0300000.0800000.0-200000.0001000000.0-300000.0-100000.0200000.0
Percentage of UnrecognizedTaxBenefitsPeriodIncreaseDecrease100.0100.00.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0

alrm:AccountsPayableAccruedLiabilitiesandOtherCurrentLiabilitiesCurrent

alrm:AccountsPayableAccruedLiabilitiesandOtherCurrentLiabilitiesCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value6860535063534833615758573226293536312827272619242415
Percentage of AccountsPayableAccruedLiabilitiesandOtherCurrentLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

alrm:AllowanceforProductReturnsCurrent

alrm:AllowanceforProductReturnsCurrent


Allowancefor
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value1344000.01488000.01480000.01341000.01253000.01224000.01075000.01126000.01374000.01639000.01915000.02231000.02471000.02392000.02244000.02327000.02314000.02395000.02175000.02154000.02116000.01944000.02028000.01838000.0
Percentage of AllowanceforProductReturnsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

alrm:BusinessCombinationConsiderationTransferredHoldbackAmount

alrm:BusinessCombinationConsiderationTransferredHoldbackAmount


Business
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value1500000.01500000.01500000.01789000.01789000.02517000.01650000.00
Percentage of BusinessCombinationConsiderationTransferredHoldbackAmount100.0100.0100.0100.0100.0100.0100.00.0

alrm:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOperatingLease us-gaap:BusinessAcquisition

alrm:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOperatingLease

alrm:ShooterDetectionSystems


Business
Period End2020-12-14
Value51000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOperatingLease100.0

alrm:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOperatingLease us-gaap:BusinessAcquisition

alrm:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOperatingLease

alrm:ShooterDetectionSystems


Business
Period End2020-12-14
Value333000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOperatingLease100.0

alrm:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseRightOfUseAssets us-gaap:BusinessAcquisition

alrm:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseRightOfUseAssets

alrm:ShooterDetectionSystems


Business
Period End2020-12-14
Value384000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseRightOfUseAssets100.0

alrm:BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentLiabilitiesAccruedCompensation us-gaap:BusinessAcquisition

alrm:BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentLiabilitiesAccruedCompensation

alrm:ShooterDetectionSystems


Business
Period End2020-12-14
Value111000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentLiabilitiesAccruedCompensation100.0

alrm:DebtIssuanceCostsGrossLiabilityComponent us-gaap:DebtInstrument

alrm:DebtIssuanceCostsGrossLiabilityComponent

alrm:ConvertibleSeniorNotesDue2026


Debt
Period End2021-06-302021-03-31
Value1212
Percentage of DebtIssuanceCostsGrossLiabilityComponent100.0100.0

alrm:DebtIssuanceCostsGrossLiabilityComponentAmortizedAndUnamortized us-gaap:DebtInstrument

alrm:DebtIssuanceCostsGrossLiabilityComponentAmortizedAndUnamortized

alrm:ConvertibleSeniorNotesDue2026


Debt
Period End2021-01-20
Value13
Percentage of DebtIssuanceCostsGrossLiabilityComponentAmortizedAndUnamortized100.0

alrm:DeferredTaxAssetsDepreciation

alrm:DeferredTaxAssetsDepreciation


Deferred
Period End2020-12-312019-12-312018-12-31
Value261000.0267000.00
Percentage of DeferredTaxAssetsDepreciation100.0100.00.0

alrm:DeferredTaxAssetsOperatingLeaseLiabilities

alrm:DeferredTaxAssetsOperatingLeaseLiabilities


Deferred
Period End2020-12-312019-12-31
Value1110
Percentage of DeferredTaxAssetsOperatingLeaseLiabilities100.0100.0

alrm:DeferredTaxAssetsTaxDeferredExpenseBusinessCombinationCosts

alrm:DeferredTaxAssetsTaxDeferredExpenseBusinessCombinationCosts


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value2773000.02811000.03092000.03310000.04482000.0126000.0117000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseBusinessCombinationCosts100.0100.0100.0100.0100.0100.0100.0

alrm:DeferredTaxAssetsTaxDeferredExpenseSubsidiaryUnitCompensation

alrm:DeferredTaxAssetsTaxDeferredExpenseSubsidiaryUnitCompensation


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value249000.0185000.0138000.01413000.01566000.0425000.088000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseSubsidiaryUnitCompensation100.0100.0100.0100.0100.0100.0100.0

alrm:DeferredTaxLiabilitiesContingentConsideration

alrm:DeferredTaxLiabilitiesContingentConsideration


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value171000.0170000.0172000.0171000.0268000.0180000.00
Percentage of DeferredTaxLiabilitiesContingentConsideration100.0100.0100.0100.0100.0100.00.0

alrm:DeferredTaxLiabilitiesDeferredExpenseDebtDiscountAndDebtIssuanceCosts us-gaap:DebtInstrument

alrm:DeferredTaxLiabilitiesDeferredExpenseDebtDiscountAndDebtIssuanceCosts

alrm:ConvertibleSeniorNotesDue2026


Deferred
Period End2021-03-31
Value18
Percentage of DeferredTaxLiabilitiesDeferredExpenseDebtDiscountAndDebtIssuanceCosts100.0

alrm:DeferredTaxLiabilitiesInternallyDevelopedSoftware

alrm:DeferredTaxLiabilitiesInternallyDevelopedSoftware


Deferred
Period End2020-12-312019-12-312018-12-31
Value620000.01208000.00
Percentage of DeferredTaxLiabilitiesInternallyDevelopedSoftware100.0100.00.0

alrm:DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets

alrm:DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets


Deferred
Period End2020-12-312019-12-31
Value8043000.07441000.0
Percentage of DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets100.0100.0

alrm:FinancingReceivableAmortizedCostNonaccrual

alrm:FinancingReceivableAmortizedCostNonaccrual


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value9000.025000.029000.055000.016000.0
Percentage of FinancingReceivableAmortizedCostNonaccrual100.0100.0100.0100.0100.0

alrm:FinancingReceivableAmortizedCostNonaccrual us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:FinanceReceivables


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value9000.025000.029000.055000.016000.0
Percentage of FinancingReceivableAmortizedCostNonaccrual100.0100.0100.0100.0100.0

alrm:LesseeOperatingLeaseLeaseNotYetCommencedMinimumLeasePayments

alrm:LesseeOperatingLeaseLeaseNotYetCommencedMinimumLeasePayments


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value2600000.0100000.0100000.0100000.0
Percentage of LesseeOperatingLeaseLeaseNotYetCommencedMinimumLeasePayments100.0100.0100.0100.0

alrm:LesseeOperatingLeaseLiabilityToBePaidAfterYearFour

alrm:LesseeOperatingLeaseLiabilityToBePaidAfterYearFour


Lessee
Period End2021-06-302021-03-312020-09-30
Value4.7694.76811
Percentage of LesseeOperatingLeaseLiabilityToBePaidAfterYearFour100.0100.0100.0

alrm:LesseeOperatingLeaseOptionToExtendAmount

alrm:LesseeOperatingLeaseOptionToExtendAmount


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value1000000.01000000.01000000.0600000.0
Percentage of LesseeOperatingLeaseOptionToExtendAmount100.0100.0100.0100.0

alrm:NotesReceivableMaximumAvailable us-gaap:AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyType, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

alrm:NotesReceivableMaximumAvailable

alrm:ServiceProvider, us-gaap:LoansReceivable


Notes
Period End2020-07-31
Value2500000.0
Percentage of NotesReceivableMaximumAvailable100.0

alrm:NotesReceivableMaximumAvailable us-gaap:AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyType, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:SubsequentEventType

alrm:ServiceProvider, us-gaap:NotesReceivable, us-gaap:SubsequentEvent


Notes
Period End2020-07-31
Value2500000.0
Percentage of NotesReceivableMaximumAvailable100.0

alrm:OperatingLeaseAvailableLeaseholdImprovementAllowance

alrm:OperatingLeaseAvailableLeaseholdImprovementAllowance


Operating
Period End2021-06-302021-03-312020-12-312020-09-302018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302014-08-31
Value1111111110109.79.79.79.79.79.79.78.0
Percentage of OperatingLeaseAvailableLeaseholdImprovementAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

alrm:OtherAssetsAllowanceForCreditLoss

alrm:OtherAssetsAllowanceForCreditLoss


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value73000.072000.072000.066000.048000.077000.00
Percentage of OtherAssetsAllowanceForCreditLoss100.0100.0100.0100.0100.0100.00.0

alrm:OtherAssetsAllowanceForCreditLossCurrent

alrm:OtherAssetsAllowanceForCreditLossCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value5000.06000.017000.030000.035000.039000.016000.0
Percentage of OtherAssetsAllowanceForCreditLossCurrent100.0100.0100.0100.0100.0100.0100.0

alrm:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestAggregateIntrinsicValue us-gaap:AwardType

alrm:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestAggregateIntrinsicValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2020-12-31
Value175
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestAggregateIntrinsicValue100.0

alrm:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestWeightedAverageGrantDateFairValue us-gaap:AwardType

alrm:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2020-12-31
Value48.08
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestWeightedAverageGrantDateFairValue100.0

alrm:TrustedServiceProviders

alrm:TrustedServiceProviders


Trusted
Period End2021-06-302021-03-312020-12-312020-09-30
Value10000.010000.010000.09000.0
Percentage of TrustedServiceProviders100.0100.0100.0100.0

us-gaap:AccountsReceivableGrossCurrent

us-gaap:AccountsReceivableGrossCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value9793898581878068635952585647444545423332312624252720
Percentage of AccountsReceivableGrossCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AllowanceForDoubtfulAccountsReceivable


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value3573000.03912000.04696000.02400000.03788000.04789000.02584000.0
Percentage of AllowanceForDoubtfulAccountsReceivable100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivable us-gaap:ConsolidatedEntities

alrm:ParentCompanyAndCertainSubsidiaries


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value3443000.03670000.04442000.02234000.03550000.04555000.02500000.0
Percentage of AllowanceForDoubtfulAccountsReceivable96.493.894.693.193.795.196.7

alrm:RemainingSubsidiaries


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value131000.0242000.0254000.0166000.0238000.0234000.084000.0
Percentage of AllowanceForDoubtfulAccountsReceivable3.76.25.46.96.34.93.3

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

us-gaap:AssetsFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value637612221224185146931371249411783676465624950135126129122
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value637612221224185146931371249411783676465624950135126129122
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationContingentConsiderationLiability us-gaap:BusinessAcquisition, us-gaap:FairValueByMeasurementFrequency

us-gaap:BusinessCombinationContingentConsiderationLiability

alrm:OpenEye, us-gaap:FairValueMeasurementsRecurring


Business
Period End2020-09-302020-06-302020-03-312019-12-312019-10-21
Value100000.0300000.02000000.02600000.02800000.0
Percentage of BusinessCombinationContingentConsiderationLiability100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationContingentConsiderationLiability us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring


Business
Period End2020-09-302020-06-302020-03-312019-12-31
Value2000.0306000.02027000.02595000.0
Percentage of BusinessCombinationContingentConsiderationLiability2.0102.0101.399.8

us-gaap:BusinessCombinationContingentConsiderationLiability us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Business
Period End2020-09-302020-06-302020-03-312019-12-31
Value2000.0306000.02027000.02595000.0
Percentage of BusinessCombinationContingentConsiderationLiability2.0102.0101.399.8

us-gaap:BusinessCombinationContingentConsiderationLiabilityMeasurementInput us-gaap:MeasurementInputType

us-gaap:BusinessCombinationContingentConsiderationLiabilityMeasurementInput

alrm:MeasurementInputRevenueVolatility


Business
Period End2020-09-302020-06-302020-03-312019-12-31
Value64.00.680.510.45
Percentage of BusinessCombinationContingentConsiderationLiabilityMeasurementInput100.0100.0100.0100.0

us-gaap:MeasurementInputDiscountRate


Business
Period End2020-09-302020-06-302020-03-312019-12-31
Value2.00.040.060.03
Percentage of BusinessCombinationContingentConsiderationLiabilityMeasurementInput3.15.911.86.7

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents

alrm:ShooterDetectionSystems


Business
Period End2020-12-14
Value311000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther

alrm:ShooterDetectionSystems


Business
Period End2020-12-14
Value240000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables

alrm:ShooterDetectionSystems


Business
Period End2020-12-14
Value1.179
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable

alrm:ShooterDetectionSystems


Business
Period End2020-12-14
Value19000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable100.0

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

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles

alrm:ShooterDetectionSystems, us-gaap:CustomerRelationships


Business
Period End2020-12-14
Value2.362
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles100.0

alrm:ShooterDetectionSystems, us-gaap:DevelopedTechnologyRights


Business
Period End2020-12-14
Value13
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles572.5

alrm:ShooterDetectionSystems, us-gaap:TradeNames


Business
Period End2020-12-14
Value0.512
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles21.7

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory

alrm:ShooterDetectionSystems


Business
Period End2020-12-14
Value917000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets

alrm:ShooterDetectionSystems


Business
Period End2020-12-14
Value348000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment

alrm:ShooterDetectionSystems


Business
Period End2020-12-14
Value77000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet

alrm:ShooterDetectionSystems


Business
Period End2020-12-14
Value26
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet100.0

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

us-gaap:CashAndCashEquivalentsFairValueDisclosure

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


Cash
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value6122212241851469313712494117836764656249501351261291291221201538
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:CashAndCashEquivalents, us-gaap:FairValueByMeasurementFrequency

us-gaap:MoneyMarketFunds, us-gaap:FairValueMeasurementsRecurring


Cash
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value6122212241851469313712494117836764656249501351261291291221201538
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Cash
Period End2021-06-302020-12-31
Value637221
Percentage of CashAndCashEquivalentsFairValueDisclosure0.0100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Cash
Period End2021-06-302020-12-31
Value637221
Percentage of CashAndCashEquivalentsFairValueDisclosure0.0100.0

us-gaap:CashEquivalentsAtCarryingValue us-gaap:CashAndCashEquivalents

us-gaap:CashEquivalentsAtCarryingValue

us-gaap:MoneyMarketFunds


Cash
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value221931176513512238
Percentage of CashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerAssetNet

us-gaap:ContractWithCustomerAssetNet


Contract
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
Value4771000.04603000.04306000.04279000.04718000.04932000.04578000.03569000.03849000.03083000.02881000.02878000.02879000.02953000.00
Percentage of ContractWithCustomerAssetNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:ContractWithCustomerLiability

us-gaap:ContractWithCustomerLiability


Contract
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
Value15131212111210101011111111121212121212
Percentage of ContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiability us-gaap:DeferredRevenueArrangementType

alrm:ActivationFees


Contract
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
Value6.56.87.07.27.57.88.18.48.68.99.29.59.910
Percentage of ContractWithCustomerLiability43.349.855.955.965.064.577.283.878.377.182.380.082.782.8

us-gaap:ContractWithCustomerLiabilityNoncurrent

us-gaap:ContractWithCustomerLiabilityNoncurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value8718000.08373000.08492000.08461000.07995000.08074000.07455000.06960000.07420000.07838000.07820000.08335000.08511000.09386000.0
Percentage of ContractWithCustomerLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentConvertibleConversionPrice1 us-gaap:DebtInstrument

us-gaap:DebtInstrumentConvertibleConversionPrice1

alrm:ConvertibleSeniorNotesDue2026


Debt
Period End2021-01-20
Value147.19
Percentage of DebtInstrumentConvertibleConversionPrice1100.0

us-gaap:DebtInstrumentConvertibleConversionPrice1 us-gaap:DebtInstrument, us-gaap:SubsequentEventType

alrm:ConvertibleSeniorNotesDue2026, us-gaap:SubsequentEvent


Debt
Period End2021-01-20
Value147.19
Percentage of DebtInstrumentConvertibleConversionPrice1100.0

us-gaap:DebtInstrumentFairValue us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentFairValue

alrm:ConvertibleSeniorNotesDue2026, us-gaap:SeniorNotes


Debt
Period End2021-06-302021-03-31
Value467465
Percentage of DebtInstrumentFairValue100.0100.0

us-gaap:DebtInstrumentUnamortizedDiscount us-gaap:DebtInstrument

us-gaap:DebtInstrumentUnamortizedDiscount

alrm:ConvertibleSeniorNotesDue2026


Debt
Period End2021-06-302021-03-31
Value7074
Percentage of DebtInstrumentUnamortizedDiscount100.0100.0

us-gaap:DeferredFinanceCostsGross us-gaap:DebtInstrument

us-gaap:DeferredFinanceCostsGross

alrm:ConvertibleSeniorNotesDue2026


Deferred
Period End2021-01-20
Value15
Percentage of DeferredFinanceCostsGross100.0

us-gaap:DeferredFinanceCostsGross us-gaap:DebtInstrument, us-gaap:SubsequentEventType

alrm:ConvertibleSeniorNotesDue2026, us-gaap:SubsequentEvent


Deferred
Period End2021-01-20
Value15
Percentage of DeferredFinanceCostsGross100.0

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxAssetsNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302016-12-312015-12-312014-12-31
Value127.0882120211719272928282618272316118.363
Percentage of DeferredIncomeTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value19184.2813.1627.6975.3832.858
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsDeferredIncome

us-gaap:DeferredTaxAssetsDeferredIncome


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value1725000.02060000.02226000.02455000.03627000.03416000.03098000.0
Percentage of DeferredTaxAssetsDeferredIncome100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsEquityMethodInvestments

us-gaap:DeferredTaxAssetsEquityMethodInvestments


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value31000.0243000.0119000.0116000.0182000.0180000.029000.0
Percentage of DeferredTaxAssetsEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-31
Value423833
Percentage of DeferredTaxAssetsGross100.0100.0100.0

us-gaap:DeferredTaxAssetsInventory

us-gaap:DeferredTaxAssetsInventory


Deferred
Period End2020-12-312019-12-312018-12-312016-12-312015-12-312014-12-31
Value240000.030000.000123000.00
Percentage of DeferredTaxAssetsInventory100.0100.00.00.0100.00.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value1198000.01289000.01210000.01357000.02678000.03183000.03824000.0
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value288000.0106000.0158000.0160000.0107000.00
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0100.00.0

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value5502000.07755000.05140000.02546000.00
Percentage of DeferredTaxAssetsTaxCreditCarryforwards100.0100.0100.0100.00.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value128.846.0643.6133.4682.2331.334
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value4633000.03114000.09588000.02362000.02622000.02936000.0964000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value1524000.0606000.0576000.0714000.01046000.01345000.01266000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesDeferredExpense

us-gaap:DeferredTaxLiabilitiesDeferredExpense


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value866000.0766000.0704000.00
Percentage of DeferredTaxLiabilitiesDeferredExpense100.0100.0100.00.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value4421000.06162000.012000.074000.02780000.02098000.01799000.0
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value5322000.03030000.03393000.02917000.04649000.03105000.01059000.0
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value1914221816111613118.5631311107.21112108.8736.238.8147.556.0654.3357.5146.9055.5965.816
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions

us-gaap:RestrictedStockUnitsRSU


Employee
Period End2020-12-31
Value45
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions


Employee
Period End2020-12-312019-12-312018-12-312017-12-31
Value4100000.05300000.04600000.04200000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentOwnershipPercentage us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentOwnershipPercentage

alrm:InstallationPartner


Equity
Period End2021-06-302021-03-312020-12-312020-09-302016-03-312015-09-302015-06-302013-11-20
Value48.248.248.248.20.4820.4820.4820.482
Percentage of EquityMethodInvestmentOwnershipPercentage100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquitySecuritiesWithoutReadilyDeterminableFairValueAmount us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquitySecuritiesWithoutReadilyDeterminableFairValueAmount

alrm:TechnologyPartner


Equity
Period End2021-06-302021-03-312020-12-31
Value5700000.05700000.0700000.0
Percentage of EquitySecuritiesWithoutReadilyDeterminableFairValueAmount100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue us-gaap:FairValueByLiabilityClass

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue

alrm:ContingentConsiderationLiabilityFromAcquisitions


Fair
Period End2020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-31
Value2000.0306000.02027000.02595000.0000
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue100.0100.0100.0100.00.00.00.0

us-gaap:FinancingReceivableAllowanceForCreditLosses us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:FinancingReceivableAllowanceForCreditLosses

us-gaap:FinanceReceivables


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value4000.05000.016000.031000.037000.029000.016000.0
Percentage of FinancingReceivableAllowanceForCreditLosses100.0100.0100.0100.0100.0100.0100.0

us-gaap:LoansReceivable


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value74000.073000.073000.065000.046000.087000.00
Percentage of FinancingReceivableAllowanceForCreditLosses1850.01460.0456.2209.7124.3300.00.0

us-gaap:FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear

us-gaap:LoansReceivable


Financing
Period End2021-06-302021-03-312020-06-302020-03-31
Value4399000.04301000.003000000.0
Percentage of FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear100.0100.00.0100.0

us-gaap:FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:LoansReceivable, us-gaap:FinancingReceivables1To29DaysPastDue


Financing
Period End2021-06-302021-03-312020-06-302020-03-31
Value4399000.04301000.003000000.0
Percentage of FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear100.0100.00.0100.0

us-gaap:FinancingReceivableOriginatedInCurrentFiscalYear us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:FinancingReceivableOriginatedInCurrentFiscalYear

us-gaap:LoansReceivable


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value1200000.0600000.000
Percentage of FinancingReceivableOriginatedInCurrentFiscalYear100.0100.00.00.0

us-gaap:FinancingReceivableOriginatedInCurrentFiscalYear us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:LoansReceivable, us-gaap:FinancingReceivables1To29DaysPastDue


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value1200000.0600000.000
Percentage of FinancingReceivableOriginatedInCurrentFiscalYear100.0100.00.00.0

us-gaap:FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear

us-gaap:FinanceReceivables


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value124000.0148000.0178000.0200000.0
Percentage of FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear100.0100.0100.0100.0

us-gaap:LoansReceivable


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value1180000.01200000.017000.020000.036000.037000.0
Percentage of FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear0.00.013.713.520.218.5

us-gaap:FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:FinanceReceivables, us-gaap:FinancingReceivables1To29DaysPastDue


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value67000.081000.029000.00
Percentage of FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear54.054.716.30.0

us-gaap:FinanceReceivables, us-gaap:FinancingReceivables60To89DaysPastDue


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value57000.067000.0149000.087000.0
Percentage of FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear46.045.383.743.5

us-gaap:LoansReceivable, us-gaap:FinancingReceivables1To29DaysPastDue


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value1180000.01200000.017000.020000.036000.037000.0
Percentage of FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear0.00.013.713.520.218.5

us-gaap:FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear

us-gaap:FinanceReceivables


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value33000.049000.011000.032000.044000.072000.0
Percentage of FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear100.0100.0100.0100.0100.0100.0

us-gaap:LoansReceivable


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value4207000.04113000.04022000.03000000.0
Percentage of FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear38245.512853.19140.94166.7

us-gaap:FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:FinanceReceivables, alrm:FinancialAsset90To119DaysPastDue


Financing
Period End2020-09-302020-06-302020-03-31
Value9000.013000.040000.0
Percentage of FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear28.129.555.6

us-gaap:FinanceReceivables, alrm:FinancialAssetEqualtoorGreaterthan120DaysPastDue


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value9000.016000.016000.015000.0
Percentage of FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear81.850.036.420.8

us-gaap:FinanceReceivables, us-gaap:FinancingReceivables1To29DaysPastDue


Financing
Period End2021-03-312020-09-302020-06-302020-03-31
Value32000.07000.0017000.0
Percentage of FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear65.321.90.023.6

us-gaap:FinanceReceivables, us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2021-03-312020-12-312020-06-302020-03-31
Value17000.02000.000
Percentage of FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear34.718.20.00.0

us-gaap:FinanceReceivables, us-gaap:FinancingReceivables60To89DaysPastDue


Financing
Period End2021-06-302020-06-302020-03-31
Value33000.015000.00
Percentage of FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear100.034.10.0

us-gaap:LoansReceivable, us-gaap:FinancingReceivables1To29DaysPastDue


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value4207000.04113000.04022000.03000000.0
Percentage of FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear38245.512853.19140.94166.7

us-gaap:FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear

us-gaap:FinanceReceivables


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value73000.098000.076000.098000.0127000.0151000.0
Percentage of FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear100.0100.0100.0100.0100.0100.0

us-gaap:LoansReceivable


Financing
Period End2021-06-302021-03-312020-06-302020-03-31
Value12000.014000.000
Percentage of FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear16.414.30.00.0

us-gaap:FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:FinanceReceivables, us-gaap:FinancingReceivables1To29DaysPastDue


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value38000.053000.049000.098000.0127000.0139000.0
Percentage of FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear52.154.164.5100.0100.092.1

us-gaap:FinanceReceivables, us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2021-03-312020-06-302020-03-31
Value45000.0012000.0
Percentage of FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear45.90.07.9

us-gaap:FinanceReceivables, us-gaap:FinancingReceivables60To89DaysPastDue


Financing
Period End2021-06-302020-12-312020-06-302020-03-31
Value35000.027000.000
Percentage of FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear47.935.50.00.0

us-gaap:LoansReceivable, us-gaap:FinancingReceivables1To29DaysPastDue


Financing
Period End2021-06-302021-03-312020-06-302020-03-31
Value12000.014000.000
Percentage of FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear16.414.30.00.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value7975706662585450474340363228242117141212111110109.7638.735
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value60565349464239353229262321181512108.1367.3037.0446.7696.4936.2175.9425.6515.114
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization75.575.475.374.974.173.372.371.369.968.466.465.664.663.461.860.859.857.657.857.557.357.057.157.557.958.5

us-gaap:DevelopedTechnologyRights


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value171615151414131312121211109.4068.4277.3016.0714.9884.3424.2624.1634.0643.9043.6783.4493.065
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization22.022.222.322.723.524.325.226.227.428.830.631.231.832.733.834.234.435.334.434.835.235.735.935.635.335.1

us-gaap:OtherIntangibleAssets


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value0.2340.2340.2340.2340.2340.2340.2340.2340.2340.2340.2340.2340.2340.2340.2340.2340.2340.2340.2340.2120.1830.1540.1240.0950.0740.007
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization0.30.30.30.40.40.40.40.50.50.50.60.60.70.80.91.11.31.71.91.71.51.41.10.90.80.1

us-gaap:TradeNames


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value1.7211.5841.4491.3531.2631.1721.0821.0221.0010.980.9590.9330.9070.8820.8560.8280.80.7710.7570.7360.7040.6730.6410.610.5890.549
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization2.22.12.02.02.02.02.02.02.12.22.42.62.83.13.43.94.55.56.06.06.05.95.95.96.06.3

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive


Finite
Period End2020-12-31
Value26
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths


Finite
Period End2020-12-31
Value17
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive


Finite
Period End2020-12-31
Value12
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour


Finite
Period End2020-12-31
Value14
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree


Finite
Period End2020-12-31
Value16
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo


Finite
Period End2020-12-31
Value17
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0

us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:FiniteLivedIntangibleAssetsGross


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value1741741741571571571571191191191191191191191191191181181717171717171713
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value126126126123123123123103103103103103103103103103103103101010101010108.967
Percentage of FiniteLivedIntangibleAssetsGross72.472.472.478.478.478.478.487.287.287.287.287.287.287.287.287.287.587.562.062.062.062.062.062.062.064.9

us-gaap:DevelopedTechnologyRights


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value4444443030303013131313131313131313135.395.395.395.395.395.395.393.983
Percentage of FiniteLivedIntangibleAssetsGross25.325.325.319.419.419.419.411.711.711.711.711.711.711.711.711.711.411.431.331.331.331.331.331.331.328.8

us-gaap:Patents


Finite
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-10-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-30
Value7.07.06.86.85.95.95.95.95.94.94.94.94.94.94.94.94.9
Percentage of FiniteLivedIntangibleAssetsGross4.04.04.34.33.74.94.94.90.04.14.14.14.14.14.14.128.5

us-gaap:TradeNames


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value3.8153.8153.8153.3043.3043.3043.3041.0841.0841.0841.0841.0841.0841.0841.0841.0841.0841.0840.9140.9140.9140.9140.9140.9140.9140.643
Percentage of FiniteLivedIntangibleAssetsGross2.22.22.22.12.12.12.10.90.90.90.90.90.90.90.90.90.90.95.35.35.35.35.35.35.34.7

us-gaap:GoodwillImpairedAccumulatedImpairmentLoss us-gaap:BusinessAcquisition

us-gaap:GoodwillImpairedAccumulatedImpairmentLoss

alrm:EnergyHub


Goodwill
Period End2020-12-31
Value4800000.0
Percentage of GoodwillImpairedAccumulatedImpairmentLoss100.0

us-gaap:InventoryFinishedGoodsNetOfReserves

us-gaap:InventoryFinishedGoodsNetOfReserves


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value5039343138272513151816107.5786.5086.6936.9443.7413.3056.236.143.6972.8563.4482.9923.8613.481
Percentage of InventoryFinishedGoodsNetOfReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryRawMaterialsNetOfReserves

us-gaap:InventoryRawMaterialsNetOfReserves


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value9.47.4089.4758.776119.1018.9217.538.6247.6026.3965.9737.146.3827.4846.6736.5223.9844.3135.3645.7564.7273.0266.6334.4833.371
Percentage of InventoryRawMaterialsNetOfReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseDiscountRate

us-gaap:LesseeOperatingLeaseDiscountRate


Lessee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value3.63.63.63.70.0380.0380.04
Percentage of LesseeOperatingLeaseDiscountRate100.0100.0100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value10101111
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear


Lessee
Period End2021-06-302021-03-312020-09-30
Value5994000.08723000.02746000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear100.0100.0100.0

us-gaap:LiabilitiesFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:LiabilitiesFairValueDisclosure

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring


Liabilities
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value2000.0306000.02027000.02766000.0185000.0185000.0185000.0385000.0389000.0389000.0389000.03160000.03051000.02912000.02978000.02768000.02169000.0874000.0762000.0
Percentage of LiabilitiesFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Liabilities
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value2000.0306000.02027000.02766000.0185000.0185000.0185000.0385000.0389000.0389000.0389000.03160000.03051000.02912000.02978000.02768000.02169000.0874000.0762000.0
Percentage of LiabilitiesFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCredit us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LineOfCredit

us-gaap:RevolvingCreditFacility, alrm:TwoThousandSeventeenFacility, us-gaap:LineOfCredit


Line
Period End2021-01-202020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-10-06
Value11011011111211363646566676869707172
Percentage of LineOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCredit us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:RevolvingCreditFacility, alrm:TwoThousandSeventeenFacility, us-gaap:LineOfCredit, us-gaap:SubsequentEvent


Line
Period End2021-01-20
Value110
Percentage of LineOfCredit100.0

us-gaap:LongTermLineOfCredit

us-gaap:LongTermLineOfCredit


Long
Period End2020-12-31
Value110
Percentage of LongTermLineOfCredit100.0

us-gaap:NotesAndLoansReceivableGrossNoncurrent us-gaap:AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyType, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:NotesAndLoansReceivableGrossNoncurrent

alrm:ServiceProvider, us-gaap:LoansReceivable


Notes
Period End2020-12-312020-09-30
Value1200000.0600000.0
Percentage of NotesAndLoansReceivableGrossNoncurrent100.0100.0

us-gaap:NotesAndLoansReceivableNetNoncurrent us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyType, us-gaap:BalanceSheetLocation

us-gaap:NotesAndLoansReceivableNetNoncurrent

us-gaap:LoansReceivable, alrm:DistributionPartnerThree, us-gaap:OtherAssets


Notes
Period End2020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value4200000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.0
Percentage of NotesAndLoansReceivableNetNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NotesAndLoansReceivableNetNoncurrent us-gaap:AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyType, us-gaap:BalanceSheetLocation, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

alrm:DistributionPartnerThree, us-gaap:OtherAssets, us-gaap:LoansReceivable


Notes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value4400000.04300000.04200000.04100000.04000000.03000000.0
Percentage of NotesAndLoansReceivableNetNoncurrent0.00.0100.00.00.0100.0

us-gaap:NotesReceivableGross us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:NotesReceivableGross

us-gaap:FinanceReceivables


Notes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.1060.1470.2110.2780.3490.423
Percentage of NotesReceivableGross100.0100.0100.0100.0100.0100.0

us-gaap:LoansReceivable


Notes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value5.5915.5155.4244.7334.0586.037
Percentage of NotesReceivableGross5274.53751.72570.61702.51162.81427.2

us-gaap:NotesReceivableGross us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:FinanceReceivables, alrm:FinancialAsset90To119DaysPastDue


Notes
Period End2020-09-302020-06-302020-03-31
Value0.0090.0130.04
Percentage of NotesReceivableGross3.23.79.5

us-gaap:FinanceReceivables, alrm:FinancialAssetEqualtoorGreaterthan120DaysPastDue


Notes
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.0090.0160.0160.015
Percentage of NotesReceivableGross4.35.84.63.5

us-gaap:FinanceReceivables, us-gaap:FinancingReceivables1To29DaysPastDue


Notes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.0380.0850.1160.1860.1560.156
Percentage of NotesReceivableGross35.857.855.066.944.736.9

us-gaap:FinanceReceivables, us-gaap:FinancingReceivables30To59DaysPastDue


Notes
Period End2021-03-312020-12-312020-06-302020-03-31
Value0.0620.0020.00.125
Percentage of NotesReceivableGross42.20.90.029.6

us-gaap:FinanceReceivables, us-gaap:FinancingReceivables60To89DaysPastDue


Notes
Period End2021-06-302020-12-312020-09-302020-06-302020-03-31
Value0.0680.0840.0670.1640.087
Percentage of NotesReceivableGross64.239.824.147.020.6

us-gaap:LoansReceivable, us-gaap:FinancingReceivables1To29DaysPastDue


Notes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value5.5915.5155.4244.7334.0586.037
Percentage of NotesReceivableGross5274.53751.72570.61702.51162.81427.2

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:OperatingLossCarryforwards

us-gaap:DomesticCountry


Operating
Period End2020-12-312019-12-312018-12-312017-12-31
Value4600000.04900000.05300000.06000000.0
Percentage of OperatingLossCarryforwards100.0100.0100.0100.0

us-gaap:StateAndLocalJurisdiction


Operating
Period End2020-12-312019-12-312018-12-312017-12-31
Value1600000.01700000.02000000.01900000.0
Percentage of OperatingLossCarryforwards34.834.737.731.7

us-gaap:OtherAccruedLiabilitiesNoncurrent

us-gaap:OtherAccruedLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value7050000.05951000.05311000.05935000.05637000.03344000.03244000.01884000.01854000.01620000.01650000.01728000.01658000.01572000.01646000.01550000.01639000.01339000.02501000.02059000.02524000.02244000.02049000.02002000.0657000.0
Percentage of OtherAccruedLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PrepaidExpenseCurrentAndNoncurrent

us-gaap:PrepaidExpenseCurrentAndNoncurrent


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312018-03-312017-12-31
Value12108.4107.4116.15.0103.8
Percentage of PrepaidExpenseCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RedeemableNoncontrollingInterestEquityCarryingAmount

us-gaap:RedeemableNoncontrollingInterestEquityCarryingAmount


Redeemable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-10-212018-12-31
Value11101010101011110.0
Percentage of RedeemableNoncontrollingInterestEquityCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:SeniorLongTermNotes

us-gaap:SeniorLongTermNotes


Senior
Period End2021-06-302021-03-31
Value416412
Percentage of SeniorLongTermNotes100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2020-12-312019-12-312018-12-312017-12-312017-06-302017-03-312016-12-312016-09-302015-12-31
Value48.0846.5238.3734.7130.7529.4830.032.930
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue


Share
Period End2020-12-312019-12-312018-12-312017-12-312017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value10445757290807484787144274127
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue us-gaap:BusinessAcquisition

alrm:Connect


Share
Period End2020-12-312019-12-312018-12-312017-12-312017-06-302017-03-312016-12-31
Value0.7430.5640.9791.3271.971.7780.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue0.71.21.31.82.22.20.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue


Share
Period End2020-12-312019-12-312018-12-312017-12-312017-06-302017-03-31
Value763956546459
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue us-gaap:BusinessAcquisition

alrm:Connect


Share
Period End2020-12-312019-12-312018-12-312017-12-312017-06-302017-03-31
Value0.7430.5450.6960.6170.3730.046
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue1.01.41.21.10.60.1

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice


Share
Period End2020-12-312019-12-312018-12-312017-12-312017-06-302017-03-31
Value16.5413.069.426.384.844.14
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice us-gaap:BusinessAcquisition

alrm:Connect


Share
Period End2020-12-312019-12-312018-12-312017-12-312017-06-302017-03-31
Value6.097.085.945.245.614.39
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice36.854.263.182.1115.9106.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue


Share
Period End2020-12-312019-12-312018-12-312017-12-312017-06-302017-03-31
Value1044575739081
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue us-gaap:BusinessAcquisition

alrm:Connect


Share
Period End2020-12-312019-12-312018-12-312017-12-312017-06-302017-03-31
Value0.7430.5640.9791.3271.971.778
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue0.71.21.31.82.22.2

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice


Share
Period End2020-12-312019-12-312018-12-312017-12-312017-06-302017-03-31
Value25.7520.615.3710.649.317.42
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice us-gaap:BusinessAcquisition

alrm:Connect


Share
Period End2020-12-312019-12-312018-12-312017-12-312017-06-302017-03-31
Value6.097.266.615.885.575.48
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice23.735.243.055.359.873.9

us-gaap:SharePrice

us-gaap:SharePrice


Share
Period End2021-06-302021-03-31
Value84.786.38
Percentage of SharePrice100.0100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding us-gaap:AwardType

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding

us-gaap:RestrictedStockUnitsRSU


Sharebased
Period End2020-12-312019-12-312018-12-312017-12-312017-06-302017-03-312016-12-312016-09-302015-12-31
Value175594521145.2341.7110.740.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:TaxCreditCarryforwardAmount us-gaap:IncomeTaxAuthority, us-gaap:TaxCreditCarryforward

us-gaap:TaxCreditCarryforwardAmount

us-gaap:DomesticCountry, us-gaap:Research


Tax
Period End2020-12-312019-12-312018-12-312017-12-31
Value2200000.05200000.04300000.02200000.0
Percentage of TaxCreditCarryforwardAmount100.0100.0100.0100.0

us-gaap:StateAndLocalJurisdiction, us-gaap:Research


Tax
Period End2020-12-312019-12-312018-12-312017-12-31
Value4100000.04300000.03200000.01400000.0
Percentage of TaxCreditCarryforwardAmount186.482.774.463.6

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued


Unrecognized
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
Value100000.0100000.0100000.0200000.0200000.0400000.0200000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.026000.021000.04000.0
Percentage of UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value4200000.03100000.02800000.02000000.0700000.0
Percentage of UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate100.0100.0100.0100.0100.0

us-gaap:ValuationAllowancesAndReservesBalance us-gaap:ValuationAllowancesAndReservesType

us-gaap:ValuationAllowancesAndReservesBalance

us-gaap:AllowanceForCreditLoss


Valuation
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value4696000.02584000.01425000.01449000.01282000.01315000.0
Percentage of ValuationAllowancesAndReservesBalance100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForLoanAndLeaseLosses


Valuation
Period End2020-12-312019-12-312018-12-312017-12-31
Value89000.016000.03319000.00
Percentage of ValuationAllowancesAndReservesBalance1.90.6232.90.0

us-gaap:SalesReturnsAndAllowances


Valuation
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value1480000.01075000.01915000.02471000.02314000.02116000.0
Percentage of ValuationAllowancesAndReservesBalance31.541.6134.4170.5180.5160.9

us-gaap:ValuationAllowanceOfDeferredTaxAssets


Valuation
Period End2020-12-312019-12-312018-12-31
Value1568000.0322000.00
Percentage of ValuationAllowancesAndReservesBalance33.412.50.0

Line plots across dimensions of each concept


us-gaap:SharesOutstanding
us-gaap:StatementEquityComponents
(None,)
Shares Outstandingus-gaap: Statement Equity Components
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:ProductOrService
(None,)
C O G S  Ratious-gaap: Product Or Service
Operating Margin
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
(None, 'alrm:Alarm.Com')
Operating  Marginus-gaap: Consolidation Items, us-gaap: Statement Business Segments
Operating Margin
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:IntersegmentElimination', None)
Operating  Marginus-gaap: Consolidation Items, us-gaap: Statement Business Segments
TTM Greenblatt ROC
_
(None,)
T T M  Greenblatt  R O C_
us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:AwardType
(None,)
Allocated Share Based Compensation Expenseus-gaap: Award Type
us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:IncomeStatementLocation
(None,)
Allocated Share Based Compensation Expenseus-gaap: Income Statement Location
us-gaap:CostOfGoodsAndServicesSold
us-gaap:ProductOrService
(None,)
Cost Of Goods And Services Soldus-gaap: Product Or Service
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService
(None,)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyType, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
(None, 'us-gaap:LoansReceivable')
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Accounts Notes Loans And Financing Receivables By Legal Entity Of Counterparty Type, us-gaap: Financing Receivable Recorded Investment By Class Of Financing Receivable
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:AmortizationOfIntangibleAssets
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
(None,)
Amortization Of Intangible Assetsus-gaap: Finite Lived Intangible Assets By Major Class
us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:BalanceSheetLocation, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
(None, 'us-gaap:Patents')
Finite Lived Intangible Assets Netus-gaap: Balance Sheet Location, us-gaap: Finite Lived Intangible Assets By Major Class
us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
(None,)
Finite Lived Intangible Assets Netus-gaap: Finite Lived Intangible Assets By Major Class
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment
us-gaap:StatementBusinessSegments
(None,)
Payments To Acquire Property Plant And Equipmentus-gaap: Statement Business Segments