GSAT


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

Table of contents


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

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:ComprehensiveIncomeNetOfTax
us-gaap:ProductOrService
us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostsAndExpenses

us-gaap:GainsLossesOnExtinguishmentOfDebt
us-gaap:DebtInstrument
us-gaap:CounterpartyName
us-gaap:GeneralAndAdministrativeExpense

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeTaxExpenseBenefit

us-gaap:InterestIncomeExpenseNonoperatingNet

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NonoperatingIncomeExpense

us-gaap:OperatingIncomeLoss

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherNonoperatingIncomeExpense

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

us-gaap:Revenues

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:Assets

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:AccountsReceivableNetCurrent
us-gaap:ProductOrService

us-gaap:InventoryNet
us-gaap:PublicUtilitiesInventory

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PropertyPlantAndEquipmentGross
gsat:PropertyPlantAndEquipmentAdditionalDisclosures, us-gaap:MajorPropertyClass, us-gaap:PropertyPlantAndEquipmentByType
us-gaap:MajorPropertyClass
us-gaap:MajorPropertyClass, us-gaap:PropertyPlantAndEquipmentByType
us-gaap:PropertyPlantAndEquipmentByType
gsat:PropertyPlantAndEquipmentAdditionalDisclosures, us-gaap:MajorPropertyClass, us-gaap:PropertyPlantAndEquipmentByType
us-gaap:ConstructionInProgressGross

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:StatementGeographical

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssets

us-gaap:AccountsPayableCurrent

us-gaap:AccruedLiabilitiesCurrent

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:LiabilitiesCurrent

us-gaap:LongTermDebtCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:LiabilitiesNoncurrent

us-gaap:LongTermDebt
us-gaap:DebtInstrument
us-gaap:DebtInstrument, us-gaap:FairValueByMeasurementBasis

us-gaap:LongTermDebtNoncurrent

us-gaap:DeferredFinanceCostsNoncurrentNet

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

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:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
us-gaap:StatementClassOfStock
us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:AmortizationOfFinancingCosts

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInInventories

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsValuationAllowance

gsat:AccountsReceivableCurePaymentReceived

gsat:ContractWithCustomerLiabilityIncreaseFromAdvancePayment

gsat:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityConversionsAndExercises

gsat:NonCashInterestExpenseCashFlow

gsat:OperatingLeaseInterestExpense

gsat:OperatingLeaseRightOfUseAssetAmortization

gsat:PaymentRelatedToLineOfCreditCovenantExcessCashFlow

gsat:ProceedsFromIssuanceOfCommonStockAndStockOptionsExercised

gsat:ReductionOfDerivativeLiabilityArisingFromSettlementOfDebt
us-gaap:DebtInstrument, us-gaap:SubsequentEventType
gsat:RepaymentOfPrincipalPaymentDuePeriodOne
us-gaap:DebtInstrument, us-gaap:SubsequentEventType
gsat:RepaymentOfPrincipalPaymentDuePeriodTwo
us-gaap:StatementEquityComponents
gsat:StockIssuedDuringPeriodSharesWarrantsExercised

gsat:StockIssuedDuringPeriodValueWarrantsExercised
us-gaap:StatementEquityComponents

gsat:StockPriceIncrease

us-gaap:AdjustmentsToAdditionalPaidInCapitalOther
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition
us-gaap:StatementEquityComponents

us-gaap:ContractWithCustomerLiabilityRevenueRecognized
us-gaap:ProductOrService
us-gaap:DebtInstrument
us-gaap:DebtConversionConvertedInstrumentSharesIssued1

us-gaap:DebtConversionOriginalDebtAmount1

us-gaap:DebtInstrumentConvertibleIfConvertedValueInExcessOfPrincipal

us-gaap:DebtIssuanceCostsIncurredDuringNoncashOrPartialNoncashTransaction

us-gaap:DepreciationAmortizationAndAccretionNet
us-gaap:DebtInstrument
us-gaap:DilutiveSecuritiesEffectOnBasicEarningsPerShareOther

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLoss

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPeriodIncreaseDecrease

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeaseRightOfUseAssetAmortization

us-gaap:ForeignCurrencyTransactionGainLossBeforeTax

us-gaap:ForeignCurrencyTransactionGainLossUnrealized

us-gaap:GainLossOnDerivativeInstrumentsNetPretax
us-gaap:DerivativeInstrumentRisk
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:ImpairmentOfLongLivedAssetsHeldForUse
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:ImpairmentOfLongLivedAssetsToBeDisposedOf

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInDueToAffiliates

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:InterestCostsIncurredCapitalized
dei:LegalEntity, us-gaap:DebtInstrument
us-gaap:InterestExpenseRelatedParty
us-gaap:ProductOrService
us-gaap:InventoryWriteDown

us-gaap:LeaseCost
us-gaap:CounterpartyName
us-gaap:OperatingLeaseExpense

us-gaap:OperatingLeasePayments

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherNoncashIncomeExpense

us-gaap:PaymentOfFinancingAndStockIssuanceCosts

us-gaap:PaymentsForConstructionInProcess
us-gaap:CounterpartyName
us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfFinancingCosts

us-gaap:PaymentsToAcquireIntangibleAssets

us-gaap:PaymentsToAcquireOtherPropertyPlantAndEquipment

us-gaap:ProceedsFromIssuanceOrSaleOfEquity
us-gaap:LitigationCase, us-gaap:SubsequentEventType
us-gaap:ProceedsFromLegalSettlements

us-gaap:ProceedsFromWarrantExercises

us-gaap:PropertyPlantAndEquipmentTransfersAndChanges

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:RepaymentsOfLinesOfCredit

us-gaap:ShortTermLeaseCost
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecurities
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecuritiesNetOfAdjustments

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised
us-gaap:StatementEquityComponents

us-gaap:UnrealizedGainLossOnDerivatives

us-gaap:WriteOffOfDeferredDebtIssuanceCost
us-gaap:DebtInstrument
us-gaap:StatementClassOfStock
dei:EntityCommonStockSharesOutstanding

gsat:AccruedCompensationAndBenefitsExcludingTaxesCurrent

gsat:AccruedInventoryInTransitCurrent

gsat:AccruedTariffsCurrent

gsat:AccruedTelecommunicationsExpenseCurrent

gsat:CARESActDeferredPayrollTaxes
us-gaap:BalanceSheetLocation, us-gaap:DebtInstrument
gsat:CompensatingBalanceEquityProceedsAccountAmount

gsat:ContractWithCustomerLiabilityAccruedLiabilitiesAndCustomerDepositsCurrent

gsat:ContractWithCustomerLiabilityAdvancePaymentNoncurrent

gsat:CreditCardProcessorReserve
us-gaap:DebtInstrument, us-gaap:DebtInstrumentRedemptionPeriod
gsat:DebtInstrumentCovenantMinimumEBITDA

gsat:DefinedBenefitPlanAmountsRecognizedinRetainedDeficit

gsat:IntangibleAssetsAndOtherAssetsAccumulatedAmortization

gsat:IntangibleAssetsAndOtherAssetsNoncurrent
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
gsat:LesseeOperatingLeaseLeaseNotYetCommencedAssumptionAndJudgmentAmount

gsat:LesseeOperatingLeaseLiabilityToBePaidAfterYearFour

gsat:LicensingandRoyaltyAgreementPaymentsReceivable

gsat:OperatingAndFinanceLeaseLiabilityCurrent

us-gaap:AccrualForTaxesOtherThanIncomeTaxesCurrent

us-gaap:AccruedBonusesCurrentAndNoncurrent

us-gaap:AccruedProfessionalFeesCurrent

us-gaap:AccruedSalesCommissionCurrent

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AssetRetirementObligationsNoncurrent

us-gaap:AssetsFairValueDisclosure
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperation

us-gaap:CapitalizedContractCostNet
us-gaap:CounterpartyName, us-gaap:DebtInstrument
us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
us-gaap:CounterpartyName, us-gaap:DebtInstrument, us-gaap:SubsequentEventType
us-gaap:BalanceSheetLocation, us-gaap:DebtInstrument
us-gaap:CompensatingBalanceAmount
us-gaap:DebtInstrument

us-gaap:ContractWithCustomerLiabilityNoncurrent
us-gaap:ProductOrService

us-gaap:DebtInstrumentCarryingAmount
gsat:DebtInstrumentPaymentPeriod, us-gaap:DebtInstrument
us-gaap:DebtInstrumentFaceAmount
us-gaap:DebtInstrument
us-gaap:DebtInstrument, us-gaap:FairValueByMeasurementBasis
us-gaap:DebtInstrumentFairValue
us-gaap:DebtInstrument
us-gaap:DebtInstrumentPeriodicPaymentTermsBalloonPaymentToBePaid

us-gaap:DebtInstrumentUnamortizedDiscountNoncurrent

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet
us-gaap:DebtInstrument

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate

us-gaap:DefinedBenefitPlanBenefitObligation

us-gaap:DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets
us-gaap:DefinedBenefitPlanByPlanAssetCategories
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:DefinedBenefitPlanFundedStatusOfPlan

us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations
us-gaap:DefinedBenefitPlanByPlanAssetCategories

us-gaap:DerivativeAssets
us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeLiabilities
us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeLiabilitiesNoncurrent
us-gaap:DerivativeInstrumentRisk, us-gaap:MeasurementInputType
us-gaap:DerivativeLiabilityMeasurementInput

us-gaap:DueToRelatedPartiesCurrent
us-gaap:CounterpartyName

us-gaap:EmbeddedDerivativeFairValueOfEmbeddedDerivativeAsset
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:DerivativeInstrumentRisk
us-gaap:EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:Range, us-gaap:DerivativeInstrumentRisk, us-gaap:MeasurementInputType
us-gaap:EmbeddedDerivativeLiabilityMeasurementInput
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions

us-gaap:EquityMethodInvestments

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

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:IncomeTaxReceivable

us-gaap:IntangibleAssetsGrossExcludingGoodwill

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LiabilitiesFairValueDisclosure
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:LiabilityForUncertainTaxPositionsNoncurrent

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
us-gaap:IncomeTaxAuthority
us-gaap:OperatingLossCarryforwards

us-gaap:OtherSundryLiabilitiesNoncurrent

us-gaap:PropertyPlantAndEquipmentOwnedAccumulatedDepreciation
us-gaap:CounterpartyName
us-gaap:PurchaseCommitmentRemainingMinimumAmountCommitted

us-gaap:PurchaseObligation

us-gaap:RestrictedCashAndCashEquivalents

us-gaap:RestrictedCashCurrent

us-gaap:RestrictedCashNoncurrent
us-gaap:ContractWithCustomerDuration
us-gaap:RevenueRemainingPerformanceObligation
us-gaap:ContractWithCustomerDuration
us-gaap:RevenueRemainingPerformanceObligationPercentage
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:StandardProductWarrantyAccrual

us-gaap:UndistributedEarningsOfForeignSubsidiaries

us-gaap:WarrantsAndRightsOutstanding
us-gaap:DebtInstrument
us-gaap:Range, us-gaap:MeasurementInputType
us-gaap:WarrantsAndRightsOutstandingMeasurementInput

Plots across concepts


IncomeStatement
Comprehensive Income Net Of Tax
Expenses
Other Nonoperating Income Expense
Balance Sheet
Cash And Cash Equivalents At Carrying Value
Assets
Derivative Assets
Current Assets
Inventory Net
NonCurrent Assets
Other Assets Noncurrent
PropertyPlantAndEquipmentNet
Property Plant And Equipment Net
Liabilities
Derivative Liabilities
Current Liabilities
Other Accrued Liabilities Current
Noncurrent Liabilities
Deferred Income Tax Liabilities Net
Stockholders Equity
Retained Earnings Accumulated Deficit
CashFlow
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInOperatingActivities
Net Income Loss
Shares
Weighted Average Number Of Diluted Shares Outstanding
OperatingLeaseLiability
Operating Lease Liability Current
NonoperatingIncomeExpense
Nonoperating Income Expense
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Remainder Of Fiscal Year
FiniteLivedIntangibleAssets
Finite Lived Intangible Assets Net
AccountsReceivable
Allowance For Doubtful Accounts Receivable Current

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonStock██▇▇▇▇▆▆▆▆▆▅▅▅▅▄▄▃▃▃▃▃▃▃▃▃▃▃▂▂▁0.1790.1790.1670.1670.1670.1670.1460.1450.1450.1450.1450.1270.1260.1260.1260.1050.1030.0980.0970.0950.0950.0910.090.090.0890.0870.0860.0860.0760.0640.054NANANA0.035NANA0.030.030.0290.029NA0.029NANANA
 us-gaap:SharesOutstanding us-gaap:StatementEquityComponents us-gaap:CommonStock██▆▆▆▆▄▄▄▃▃▁▁▁▁1793.0631791.7031674.6691670.3551670.291667.7041464.5441451.6361451.7381450.0691446.7841265.6221264.1051263.1141261.949NANANA1106.611NANANA1038.457NANANA998.387NANANA844.892NANANA489.086NANANA353.058NANANA309.959NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁1791.9431679.754NA1670.3151668.9741557.961452.6141647.7341640.4421632.2571287.7421427.81263.3721437.3281251.8261345.9051128.9851113.9681086.6311080.3131249.6721041.0281037.881234.5511205.451000.8451192.2631189.19904.994849.321779.483673.546496.169472.187424.180.392344379.433357.418312.867295.513294.963293.053291.818287.502282.08275.37
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁1791.9431679.754NA1670.3151668.9741557.961452.6141451.7031450.381448.3181287.7421264.5161263.3721262.3361251.8261169.9931128.9851113.9681086.6311080.3131049.3811041.0281037.881031.3981009.9171000.845993.427987.668904.994849.321779.483673.546496.169472.187424.180.392344379.433357.418312.867295.513294.963293.053291.818287.502282.08275.37
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount █▁7.35.5NA4.34.47.2NANANANANANA150.2NANANA190.5212.5NA195.8NA204.5NANANA199.8NANANANANANANANANANANANANANANANANANANANA
us-gaap:EarningsPerShareBasic ▆▆▆▆▆▆▆▆▆▆▅▆▆▇▆▆▅▆▅▆▆▆▆▆█▅▇▇▁▃▂▃▃▅▅▅▅▅▅▆▅▆▅▅▅▅-0.01-0.02-0.020000000000000004-0.01-0.01-0.02-0.030.010.00.02-0.070.01-0.010.07-0.020.04-0.09-0.02-0.110.00.01-0.03-0.030.020.2-0.130.090.13-0.48-0.29-0.36-0.3-0.25-0.05-0.05-0.1-0.07-0.07-0.110.0-0.05-0.02-0.05-0.09-0.07-0.13
us-gaap:EarningsPerShareDiluted ▆▆▆▆▆▆▆▆▆▆▅▆▆▇▆▇▅▆▅▆▆▆▆▆█▅▇▇▁▃▂▃▃▆▆▅▅▅▅▆▆▆▆▅▅▅-0.01-0.02-0.020000000000000004-0.01-0.01-0.02-0.03-0.010.010.02-0.070.01-0.010.06-0.020.04-0.09-0.02-0.110.00.01-0.03-0.030.020.17-0.130.080.11-0.48-0.29-0.36-0.3-0.25-0.05-0.05-0.1-0.07-0.07-0.110.0-0.05-0.02-0.05-0.09-0.07-0.13
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 COGS Ratio us-gaap:ProductOrService us-gaap:Product▅▄▅▅▂▂▇▅▅▄▆██▁▁▅▃4.6623.8434.3914.3723.2743.2595.424.4624.4913.9594.765.7945.7312.7392.8054.3893.822NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 COGS Ratio us-gaap:ProductOrService us-gaap:Service▃▁▅▄▄▅▃█▃▃▄▅▄▃▃▃▂25.61723.08628.78128.38527.0928.93526.41534.15226.726.11927.18629.89827.99526.0126.62226.06924.301NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:ComprehensiveIncomeNetOfTax ▅▅▅▅▅▅▅▆▆▆▅▆▆▇▆▆▅▆▄▆▆▅▅▆█▄▇▇▁▃▃▄▄▅▆▅▅▅▅▆▆▆-24.607-33.091-25.073-25.037-26.104-32.92-37.61122.1335.69125.501-96.1539.519-4.38287.6-22.37951.504-98.779-20.982-116.274-2.49313.174-27.598-27.29323.483205.214-131.01789.119128.896-432.875-251.776-232.07-204.417-126.353-25.648-19.278-40.069-27.443-24.066-36.4-0.815-14.321-6.22NANANANA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService us-gaap:Product▃▃▅▆▃▂██▅▄▅█▇▁▁▃▃2.8582.8993.6534.0322.942.6434.5544.4823.5783.1493.6734.4264.172.1722.1652.9052.778NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService us-gaap:Service▄▄▂▁▁▂▃▄▅█▇▆▆▃▇▅▄9.1239.0778.7968.588.6478.7288.9929.2169.3959.8539.6649.4299.5269.0299.6979.3159.036NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CostsAndExpenses ▅▅▅▅▅▅▅▆▅▅▆▆▂▄▇▄▄▄▄▄▄▃▃▄▄▃▆▄▅▄▅▅▃▃▃▃█▂▃▃▃▂▅▂▁46.28746.18948.23647.39245.74346.27948.88950.61947.84748.40950.35353.65431.77841.70759.70841.25140.63339.85441.19940.30741.49737.53438.6839.76740.4438.20754.28441.53449.02941.11147.82645.12339.43637.72338.06638.19263.38531.66839.65639.57535.81731.01445.33631.53626.606NA
us-gaap:GainsLossesOnExtinguishmentOfDebt 2.664NANANANANANANANANA0.00.0NA0.00.0-6.306NANA0.00.00.0NA0.00.0-2.189-0.065-0.231-12.936-16.484-10.1951.717-63.569-47.24NANANANANANANANANANANANANA
 us-gaap:GeneralAndAdministrativeExpense us-gaap:CounterpartyName gsat:ThermoCapitalPartnersLlc▄▄0.20.2NANA0.1NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments ▆▅▆▅▅▅▅▆▆▆▅▆▆▇▆▆▅▆▄▆▆▅▅▆█▄▇▇▁▃▃▄▄▅▆▅▅▅▅▆▆▆▆▅▆-21.095-36.256-21.241-24.888-24.646-38.202-37.32621.1516.24625.798-96.4449.07-6.98887.971-22.60452.473-98.628-20.125-117.202-8.8813.649-26.756-25.87324.213204.873-129.49991.643129.479-432.758-250.348-233.999-204.851-126.153-24.975-18.9-41.132-27.385-24.368-33.985-0.703-13.987-6.358-17.794-24.485-19.214NA
us-gaap:IncomeTaxExpenseBenefit ▇▇█▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▁▇▇█▇▇▇▇▇█▇█▇▇▇▇▇▇▇▇▇▇▇▇▇▇0.3540.0770.4930.0580.090.0210.4210.040.0570.0270.0090.0510.0240.041-0.0190.0670.1060.0360.019-6.3-0.450.1910.9430.1150.1060.228-0.3740.0890.9720.1930.7970.1180.1190.1030.0520.0560.1480.157-0.276-0.0220.0810.1080.2890.0080.035NA
us-gaap:InterestIncomeExpenseNonoperatingNet ▆▆▆▆▆▅▃▅▅▅▅▅▆▇▇▆▆▆▆▆▆▆▆▆▆▆▆▆▅▆▁▄▅▇▇▇██-10.778-11.574-11.513-11.398-11.508-14.01-22.315-14.471-12.808-12.87-12.596-13.358-10.305-7.353-8.139-8.954-8.85-8.828-8.932-8.866-9.049-9.105-9.074-9.019-9.244-8.517-9.38-9.067-13.864-10.921-27.959-16.901-15.216-7.752-8.09-6.565-3.781-3.05NANANA-1.212NANANANA
us-gaap:InterestPaidNet ▃▁▃▁▄▁█▁▇▁█▁▇▁▇3.9370.044.9070.045.930.04114.4310.0412.8820.013.7580.03912.0310.03912.378NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss ▆▅▆▅▅▅▅▆▆▆▅▆▆▇▆▆▅▆▄▆▆▅▅▆█▄▇▇▁▃▃▄▄▅▆▅▅▅▅▆▆▆▆▅▆▅-21.449-36.333-21.734-24.946-24.736-38.223-37.74721.1116.18925.771-96.4539.019-7.01287.93-22.58552.406-98.734-20.161-117.221-2.57714.099-26.947-26.81624.098204.767-129.72792.015129.39-433.73-250.541-234.797-204.969-126.272-25.078-18.952-41.188-27.533-24.525-33.709-0.681-14.068-6.466-18.083-24.493-19.249-35.642
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings█▁-21.449-36.333NA-24.946-24.736-38.223NA21.1116.18925.771NA9.019-7.01287.93NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic NANA-23.952-25.019-24.729-38.223-35.463-24.22610.83830.295-106.77513.434-7.01290.341-31.50555.314-98.734-20.161-126.0570.42617.037NA-23.91726.936207.508NANANANANANANANANANANANANANANANANANANANANA
us-gaap:NonoperatingIncomeExpense ▅▅▅▅▅▅▅▆▆▆▅▆▅▇▆▆▅▅▄▆▆▅▅▆█▄▇▇▁▃▃▄▄▅▆▅▆▅▅▆▆▆▆▅▅-5.087-16.996-6.177-10.253-9.267-24.117-20.27233.15622.90244.129-78.03727.032-8.936100.9297.67763.266-86.118-4.923-100.3985.88330.06-11.058-9.9640.302222.29-112.314123.834147.572-407.723-229.773-207.167-182.277-106.552-6.5850.104-23.47716.019-9.438-11.71620.6852.8316.40211.017-11.172-10.23NA
us-gaap:OperatingIncomeLoss ▅▅▅▅▅▆▅▆▅▅▅▅█▆▃▆▆▅▅▅▅▅▅▅▅▅▃▅▄▅▄▄▅▅▅▅▁▅▄▄▅▆▃▆▆-16.008-19.26-15.064-14.635-15.379-14.085-17.054-12.005-16.656-18.331-18.407-17.9621.948-12.958-30.281-10.793-12.51-15.202-16.804-14.763-16.411-15.698-15.913-16.089-17.417-17.185-32.192-18.093-25.035-20.575-26.832-22.574-19.601-18.39-19.004-17.655-43.404-14.93-22.269-21.388-16.818-12.76-28.811-13.313-8.984NA
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▁█-3.1583.242NA-0.091-1.3685.303NA1.022-0.498-0.27NA0.52.63-0.33NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome▁█-3.1583.242NA-0.091-1.3685.303NA1.022-0.498-0.27NA0.52.63-0.33NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherNonoperatingIncomeExpense ▄▄▂▄▄▄▃▂▅▄▄▅▁▄▄▄▂▄▄▄▅▄▆▂▄█▅▇▃▅▂▃▄▅▃▄▄▄▄▂▄▅▄▃▃-0.0880.022-2.643-0.346-0.233-0.333-0.75-2.5290.474-0.009-0.6171.331-3.351-0.662-0.433-0.314-2.102-0.0240.151-0.5050.685-0.6091.501-1.953-0.4524.1330.8312.586-1.0920.713-1.837-1.54-0.2240.642-1.342-0.439-0.6320.132-0.255-1.8760.1251.1790.012-0.883-1.132NA
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▅▄▆▆▅▆▆█▆▅▆▇▇▅▅▆▅▄▄▄▄▃▃▃▃▃▃▃▄▃▃▃▂▂▂▃▂▁▂▂▂▂▁▂▂▁30.27926.92933.17232.75730.36432.19431.83538.61431.19130.07831.94635.69233.72628.74929.42730.45828.12324.65224.39525.54425.08621.83622.76723.67823.02321.02222.09323.44123.99420.53620.99422.54919.83519.33319.06220.53719.98116.73817.38718.18718.99918.25416.52518.22317.62215.571
us-gaap:Revenues ▅▄▆▆▅▆▆█▆▅▆▇▇▅▅▆▅▄▄▄▄▃▃▃▃▃▃▃▄▃▃▃▂▂▂▃▂▁▂▂▂▂▁▂▂▁30.27926.92933.17232.75730.36432.19431.83538.61431.19130.07831.94635.69233.72628.74929.42730.45828.12324.65224.39525.54425.08621.83622.76723.67823.02321.02222.09323.44123.99420.53620.99422.54919.83519.33319.06220.53719.98116.73817.38718.18718.99918.25416.52518.22317.62215.571
us-gaap:SellingGeneralAndAdministrativeExpense ▃▄▄▄▄▄▃▆▄▅▆▇█▅▄▃▃▃▄▄▅▃▃▃▄▃▃▃▂▂▂▃▁▁▂▃▃▂▂▅▅▄▄▆▄9.68110.09710.33110.06310.25311.0919.7112.89511.02211.60613.16315.06115.94411.27510.4499.6169.5449.4910.84510.07711.458.618.9889.67510.1598.5968.7218.7838.2477.7697.3099.0796.5776.9247.7749.288.7638.5228.43212.24911.57210.18310.58212.91110.122NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:Assets ▁▁▁▁▂▂▂▃▃▃▃▃▃▄▄▄▄▄▄▄▅▅▆▆▆▆▆▇▇▇▇█▇████████875.771913.297888.093910.513923.55939.145965.591019.8431037.0631044.9081045.4821057.8211068.4361126.7491129.2651107.8081109.9691133.931132.6141148.7631156.761167.2561232.9211267.3091260.2821258.6691268.421319.961327.3581349.9921372.6081389.7741374.7041390.6021403.7751404.1091417.0841424.6451420.4051406.7991416.352NA1386.808NANANA
us-gaap:LiabilitiesAndStockholdersEquity ▁▁▁▁▂▂▂▃▃▃▃▃▃▄▄▄▄▄▄▄▅▅▆▆▆▆▆▇▇▇▇█▇████████875.771913.297888.093910.513923.55939.145965.591019.8431037.0631044.9081045.4821057.8211068.4361126.7491129.2651107.8081109.9691133.931132.6141148.7631156.761167.2561232.9211267.3091260.2821258.6691268.421319.961327.3581349.9921372.6081389.7741374.7041390.6021403.7751404.1091417.0841424.6451420.4051406.7991416.352NA1386.808NANANA
us-gaap:StockholdersEquity ▇▇▇▇▇▇▇▇▇▆▆▇▆▆▆▅▄▄▄▅▅▅▅▅▅▃▄▃▁▂▄▅▇▇▇▇█████412.132435.71423.065446.555470.486495.123407.343416.142392.886385.375358.945392.1381.343383.991291.224197.04291.474155.405161.819254.702256.144216.903237.131263.075223.794-39.57878.916-14.532-204.454-74.276116.755266.602421.256469.604494.544484.073521.704533.769533.795551.104550.461NA535.418NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AssetsCurrent ▃▅▃▃▃▂▃█▇▇▆▆▅▇▇▂▁▂▁▁▁▁▁▂▂▂▁▄▃▄▄▃▇▇██▃▃▃▄▆71.862112.00768.48773.31165.18461.12563.26146.514143.552133.205122.501115.734102.005144.061136.4148.04538.2150.13338.1344.79742.16142.0638.49159.82349.21949.82244.81480.36778.36681.77681.36668.152134.189131.116154.549150.98771.42768.57869.47385.691119.311NA118.879NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▂▂▂▂▂▂▂▃▃▂▂▃▂▅▄▂▂▃▂▂▂▂▂▃▂▂▁▃▃▂▂▁▁▁▂▁▁▂▂▁▃▂▄▆█15.7248.36913.3319.47712.0710.4637.60626.22525.08513.77315.21220.46212.80648.8141.64416.2438.83823.53510.2312.9111.26911.8597.47627.97312.87113.6557.12127.22123.819.59517.4086.6436.2371.311.7921.2194.827.7359.9516.0824.0888.25433.01757.45287.188NA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▃▇▃▄▃▃▂▅▅▄▄▄▃█▇▂▁▃▁▁▁66.708106.7468.02374.33666.92961.57959.12887.44985.98374.34775.4973.39665.498112.703105.27954.22746.75361.4548.21350.86949.187NA45.394NANANA45.039NANANANANANANANANANANANANANANANANANANA
us-gaap:AccountsReceivableNetCurrent ██▅▅▄▅▅▅▅▄▄▄▄▃▃▃▂▁▂▃▂▂▂▁▃▂▂▂▃▂▂▃▂28.8728.25722.14721.41819.75621.54421.7620.90922.41920.03719.32720.47119.88617.16117.11317.61315.36912.91815.21916.58516.16414.44514.53614.05116.65315.315.01516.21716.76715.88615.72316.44414.907NA13.944NA11.78111.97612.39313.2215.406NA13.671NANANA
us-gaap:InventoryNet ▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▂▂▂▂▂▂▄▄▄▅▅▅▆▆▆▆▆▆▇█11.81112.7313.73615.36215.68816.01316.34117.2414.83114.41514.27413.0677.7427.6717.2738.5048.8148.8518.0939.7319.69811.35512.02312.0811.97313.58414.73429.27728.63329.52131.81737.48238.10939.82342.18143.04541.15441.23941.84850.00355.715NA55.635NANANA
us-gaap:PrepaidExpenseAndOtherAssetsCurrent ▅▅▅▄▄▄▅▇▇█▄▃▃▂▂▁▁▁▁▁▁▁▁▁▂▂▂▂▂▂▂▂▂▁▁▁▄▁▁▂▅15.45715.34815.64913.42914.04513.10516.93120.91620.31924.40613.418.88.8796.5266.7455.6855.1894.8294.5885.5715.034.4014.4565.7197.7227.2837.7487.4566.9137.4157.0597.5836.445.3275.2335.78512.9725.1285.2817.02114.735NA5.061NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:PropertyPlantAndEquipmentGross █▄▁1570.4961565.0851561.497NANA1548.3711551.2441547.7661547.9971544.3721548.571548.051554.481555.9221550.1621560.921555.8751566.0061558.8441550.5811541.9731534.0891521.7291510.4861499.9021490.9941486.5461474.8211466.9211462.7031460.1021454.5561451.0551443.8011418.271409.7111396.528NA1362.554NANANANANANANA
 us-gaap:ConstructionInProgressGross gsat:PropertyPlantAndEquipmentAdditionalDisclosures,us-gaap:MajorPropertyClass,us-gaap:PropertyPlantAndEquipmentByType gsat:NewGatewayAntennas,gsat:GlobalStarSystem,gsat:GroundComponentNANA7.9NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PropertyPlantAndEquipmentNet ▁▁▁▂▂▂▃▃▃▃▄▄▄▅▅▅▅▅▆▆▆▆▆▆▆▆▆▇▇▇▇▇████████▇681.325695.967715.909734.208754.263775.002799.914820.315843.952864.2882.695903.99935.036958.072971.1191000.9911013.7981027.3561039.7191048.3221059.0191070.4391077.561083.5161090.0851100.5041113.561120.1561131.8841149.3571169.7851187.2881207.811221.1431215.1561226.3141231.3911232.311217.7181205.5351178.599NA1150.47NANANA
us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill NANA21.496NANANA18.288NANANA19.9NANANA7.9NANANA5.6NANANA4.4NANANA1.7NANANANANANANANANANANANANANANANANANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill NANA27.52NANANA25.208NANANA25.109NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:FiniteLivedIntangibleAssetsNet NANA6.024NANANA6.92NANANA5.243NANANA1.972NANANA1.282NANANANANANANANANANANA1.023NANANA1.777NANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass gsat:RegulatoryAuthorizationsNANA1.184NANANA1.46NANANA0.957NANANA0.822NANANA0.0NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:DevelopedTechnologyRightsNANA4.84NANANA5.46NANANA4.286NANANA1.15NANANA1.263NANANANANANANANANANANA0.748NANANA1.235NANANANANANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset █▅▅▅▅▅▅▅▅▅▁27.54214.45514.414.49314.92615.35815.87116.2714.19814.5870.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent NANA1.132NANANA0.535NANANA1.338NANANA1.226NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AccountsPayableCurrent ▂▁▁▁▁▁▂▁▂▂▂▂▂▁▁▂▂▂▂▂▁▂▂▂▁▁▂▂▂▃▃▅▆▆▆▇▆▅█▆▆7.5735.372.9174.8424.7144.1358.0155.0197.0836.2066.9959.5256.9885.6256.0486.2827.6246.2087.4996.576.0396.1358.6939.6535.4685.016.92212.19512.37413.38914.62726.44434.84532.56935.68542.75531.98331.18747.80832.44232.113NA26.434NANANA
us-gaap:AccruedLiabilitiesCurrent ▃▄▃▄▂▃▃▇▅▇▂▄▂▄▁▄▁▄▂▄▄▃▂▄▂▃▂▃▂▃▂▆▄█▄▅█▆▄▆▄25.80427.14525.91628.08223.62426.2724.87436.83929.68834.59323.08528.99922.8927.89120.75427.88920.66427.51923.16228.06626.95526.84422.43929.11822.27826.70522.34225.86621.98926.07322.732.82827.10638.24828.16429.51337.29734.0228.80632.26428.163NA48.162NANANA
us-gaap:ContractWithCustomerLiabilityCurrent ▂▁▁▃▂▂▄▂▆▅▆█▆26.82325.90325.97728.25626.98727.18429.9127.83932.71331.48531.93835.03133.047NA31.747NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LiabilitiesCurrent ▁▂▂▁▁▁▁▂▂▂▂▂▂▂▂▂▃▂▂▂▂▂▁▁▁▁▁▁▁▂▂▂████▂▁▁▁▁60.618114.02114.215107.177100.68657.9763.06169.008170.957169.293159.68162.549151.882166.454160.317184.635223.674176.107172.45119.999116.039110.933107.031103.64890.23479.04579.24390.20487.288179.057140.04142.635730.076770.14761.16762.873190.27280.02291.58100.16696.205NA94.456NANANA
us-gaap:LongTermDebtCurrent NA55.29958.82445.52645.00.00.098.82998.82996.24996.24987.73287.73279.21579.21594.327108.7275.75575.75538.11238.11232.83532.83519.64219.6426.456.457.2717.2714.0464.046NA585.67657.474655.874651.90983.755NANANANANANANANANA
us-gaap:OperatingLeaseLiabilityCurrent 2.49NA1.33NANANA1.634NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAccruedLiabilitiesCurrent NANA1.058NANANA0.61NANANA1.528NANANA0.876NANA0.7160.6860.6180.8650.6821.4871.5941.451.3921.1350.9181.3221.040.6490.6210.7660.660.7130.8310.721NA1.58NANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:LiabilitiesNoncurrent ▂▂▂▂▂▂▃▃▃▃▃▃▃▃▄▄▄▅▅▄▄▅▅▅▅▇▆▇█▇▆▅▁▁▁▁▄▅▄▄▄403.021363.567350.813356.781352.378386.052495.187434.693473.22490.24526.857503.172535.211576.304677.724726.131794.821802.418798.345774.062784.577839.42888.759900.586946.2541219.2021110.2611244.2881444.5241245.2111115.813980.537223.372150.858148.071157.163705.108810.854795.03755.529769.686NA756.934NANANA
us-gaap:LongTermDebt ▁▂▂▂▂▂▃▄▄▃▃▄▄▄▄▅▅▅▅▅▅▅▆▆▆▆▆▆▆▆▆▆▇▇█313.423390.925385.41375.595369.233356.04464.176501.297491.535470.288463.451495.347488.459520.524513.866560.996568.686583.259576.279585.423578.462587.85639.027638.479629.075633.103630.09631.041632.087664.258669.282675.69712.782755.215800.121NANANANANANANANANANANA
us-gaap:LongTermDebtNoncurrent ▃▄▄▄▄▄▅▄▄▄▄▄▄▅▅▅▅▆▅▆▆▆▇▇▇▇▇▇▇▇▇▇▁▁▁▁▇████313.423335.626326.586330.069324.233356.04464.176402.468392.706374.039367.202407.615400.727441.309434.651466.669459.966507.504500.524547.311540.35555.015606.192618.837609.433626.653623.64623.77624.816660.212665.236675.69127.11297.74195.15590.204655.208732.727723.888701.169690.255NA664.543NANANA
us-gaap:DeferredFinanceCostsNoncurrentNet NANA38.5NANANA43.6NANANA24.4NANANA34.5NANANA45.7NANANA57.90661.16458.05660.98963.86266.81669.87173.31376.43679.86115.91717.35316.88310.52850.78953.64253.48254.41159.251NA59.87NANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet NANA0.755NANANA0.395NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent ▂▂▂▂▂▃▃▃▃▃▃▃▃▃▃▄▄▄▄▄▄▄▄▅▅▅▅▁▁▁▂████████▃▃3.5073.5853.653.7553.9854.1454.1284.6194.584.5414.4894.454.4584.4524.3894.7094.9444.9174.8834.9114.8944.8564.815.5375.445.4785.4993.1463.3363.4483.5297.1177.2167.2267.2217.1527.3757.4097.4074.244.654NA4.727NANANA
us-gaap:OtherLiabilitiesNoncurrent ▂▁▁▁▁▁▁▁▁▁▁▂▂▂▂▃▂▃▂▂▅▅▅▅▅▅▅▆▆▆▆▇▆▇▇█▇██▇█4.1273.3533.4483.0292.7112.7543.0712.7312.9013.2613.3663.9254.0885.5865.9736.3185.836.1915.895.47711.93111.54710.90710.99611.76711.23312.20513.98714.82414.74513.69615.41114.75616.79915.8817.35716.03918.3417.44416.90417.626NA22.97NANANA
us-gaap:OperatingLeaseLiabilityNoncurrent █▅▅▅▅▅▅▅▅▅▁25.49213.40813.72613.76314.03714.33414.74715.15813.18513.5710.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo 4.177NA2.478NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree 4.055NA2.51NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour 4.094NA2.383NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA2.405NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA8.803NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:StockholdersEquity ▇▇▇▇▇▇▇▇▇▆▆▇▆▆▆▅▄▄▄▅▅▅▅▅▅▃▄▃▁▂▄▅▇▇▇▇█████412.132435.71423.065446.555470.486495.123407.343416.142392.886385.375358.945392.1381.343383.991291.224197.04291.474155.405161.819254.702256.144216.903237.131263.075223.794-39.57878.916-14.532-204.454-74.276116.755266.602421.256469.604494.544484.073521.704533.769533.795551.104550.461NA535.418NANANA
 us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonStock██▇▇▇▇▆▆▆▆▆▅▅▅▅▄▄▃▃▃▃▃▃▃▃▃▃▃▂▂▁0.1790.1790.1670.1670.1670.1670.1460.1450.1450.1450.1450.1270.1260.1260.1260.1050.1030.0980.0970.0950.0950.0910.090.090.0890.0870.0860.0860.0760.0640.054NANANA0.035NANA0.030.030.0290.029NA0.029NANANA
us-gaap:AdditionalPaidInCapital ██████▇▇▇▇▇▇▇▇▇▆▆▆▅▅▅▅▅▅▅▅▅▅▄▃▃▂▂▁▁▁▁▁▁▁▁2143.3192142.292096.5662094.9832093.8772092.411970.0471941.2361940.1131938.2931937.3641874.3841873.1471871.4131869.3391752.7861698.7241663.8821649.3151625.9261624.8751598.8121591.4431590.0941574.2971516.1411503.6191499.291438.2671135.5821074.837976.386889.912864.882864.175834.434831.996816.621792.584773.495772.039NA736.455NANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▁▁▁▁▁▂▂▂▂▂▂▂▂▂▂▂▂▂▂▃▃▃▃▃▃▂▂▂▁▃▅▆▇▇▇▇█████-1728.506-1707.057-1670.724-1648.99-1624.044-1599.308-1559.401-1521.654-1542.765-1548.954-1574.725-1478.272-1487.291-1480.279-1571.302-1548.717-1601.123-1502.389-1482.228-1365.007-1362.43-1376.529-1349.582-1322.766-1346.864-1551.631-1421.904-1513.921-1643.311-1209.579-959.038-724.242-519.272-393.0-367.922-348.97-307.782-280.25-255.724-222.013-221.334NA-200.8NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▄▇▄▇▇█▄▄▃▃▄▃▃▁▁▁▂▂▂▂▂▂▃▃▄▃▄▇▇▆▇▅▅▅▅▅▅▅▄▆▆▇▆-2.860.298-2.9440.3950.4861.854-3.449-3.585-4.607-4.109-3.839-4.139-4.639-7.269-6.939-7.145-6.243-6.199-5.378-6.325-6.409-5.484-4.833-4.356-3.741-4.188-2.8980.00.493-0.3640.871-1.855-2.408-2.327-1.758-1.432-2.551-2.641-3.1-0.409-0.275-0.022-0.268NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities █▃▂▄▃▃▂▃▃▃▁▄▂▄▂▄▃▃▃▃▂▃▂▃▂▃▂▃51.4084.512-1.47214.8284.2544.605-2.9964.2340.4851.325-13.84811.963-2.0279.832-2.77110.3720.9465.311.1096.703-1.6022.603-5.1528.576-3.7832.521-2.8944.522NANA-8.7964.16-1.293-0.533-4.0049.074.391-2.5835.347-5.365-1.892-3.593-15.65-1.456NANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▅▆▆▆▇█▆▇▇▇▆▆▅▇▅▇▅▆▅▆▄▆▂▄▄▅▁█-7.024-4.974-5.241-4.416-3.301-1.578-3.866-2.528-2.836-2.261-4.22-4.282-6.513-2.386-7.207-2.879-6.602-4.088-7.13-5.028-7.55-4.908-11.932-7.534-8.204-5.808-13.212-1.267NANA-6.504-10.65-10.782-9.183-10.223-13.13-11.347-23.31-14.886-19.305-31.874-33.354-43.489-31.125NANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▇▅▅▅▅▄▅▆▅▆▅▃▅█▅▅▆▅▅▅▅▅▆▆▆▅▅-84.47339.2450.292-3.0974.39-0.421-21.489-0.17113.93-0.19320.3420.076-38.6140.061.051-0.151-9.12812.0183.419-0.0158.576.528-2.92515.00711.13310.061-3.8020.317NANA25.936.59316.938-0.48924.5280.04.623.25813.8787.30649.35912.09535.3663.895NANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▂▇▄▅▅▅▂▄▅▄▅▅▁▅█▅▃▅▄▄-40.03238.717-6.3137.4075.352.451-28.3211.46611.636-1.1432.0947.898-47.2057.42451.0527.474-14.69713.237-2.6561.682NANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AmortizationOfFinancingCosts ▂▃▃▁▃▃█▆▄▄▄▄▄▃▃▃▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▇▂▂▂▃▂▂▂▂▂0.6751.1661.07-0.6491.9611.8616.764.6562.2822.1982.3412.4972.1941.6581.9491.9892.0822.0762.2332.262.3262.3462.6122.4432.3312.3362.4522.5482.5022.5412.5362.1752.0112.075.4090.8250.8170.8560.9390.9360.8850.9130.8190.887NANA
us-gaap:IncreaseDecreaseInAccountsReceivable ▃█▇▄▂▅▃▂▅▄▂▃▅▃▃▄▅▁▂▃▄▃▃▂▄▄▂▃▄▃▃▄▃▃▃▄▃▂▂▂▃▄▄▄0.826.935.3091.74-1.1142.5591.05-1.0792.6521.676-0.6940.8343.3830.2690.1072.0532.78-1.957-0.870.9222.0860.0580.922-1.122.3431.309-0.4990.411.4240.8650.322.150.8351.0160.9562.1210.184-0.386-0.977-0.9650.7112.2092.2411.471NANA
us-gaap:IncreaseDecreaseInInventories ▃▄▃▄▄▄▁█▆▄▇▂▅▅▄▄▅▅▂▄▂▃▅▅▂▃▅▃▂▂▆▃▃▂▅▅▅▃▃▁▄▃▆█-0.665-0.453-1.296-0.344-0.362-0.174-2.6032.5121.6480.1071.869-2.0070.2210.403-0.332-0.340.3020.32-1.599-0.048-1.7-1.2240.9270.517-1.768-0.7940.216-0.879-1.437-2.0871.129-0.76-1.384-2.1090.7780.5570.439-0.756-1.012-2.276-0.085-0.8791.2382.895NANA
us-gaap:NetCashProvidedByUsedInOperatingActivities █▃▂▄▃▃▂▃▃▃▁▄▂▄▂▄▃▃▃▃▂▃▂▃▂▃▂▃51.4084.512-1.47214.8284.2544.605-2.9964.2340.4851.325-13.84811.963-2.0279.832-2.77110.3720.9465.311.1096.703-1.6022.603-5.1528.576-3.7832.521-2.8944.522NANA-8.7964.16-1.293-0.533-4.0049.074.391-2.5835.347-5.365-1.892-3.593-15.65-1.456NANA
us-gaap:NetIncomeLoss ▆▅▆▅▅▅▅▆▆▆▅▆▆▇▆▆▅▆▄▆▆▅▅▆█▄▇▇▁▃▃▄▄▅▆▅▅▅▅▆▆▆▆▅▆▅-21.449-36.333-21.734-24.946-24.736-38.223-37.74721.1116.18925.771-96.4539.019-7.01287.93-22.58552.406-98.734-20.161-117.221-2.57714.099-26.947-26.81624.098204.767-129.72792.015129.39-433.73-250.541-234.797-204.969-126.272-25.078-18.952-41.188-27.533-24.525-33.709-0.681-14.068-6.466-18.083-24.493-19.249-35.642
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings█▁-21.449-36.333NA-24.946-24.736-38.223NA21.1116.18925.771NA9.019-7.01287.93NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ShareBasedCompensation ▄▄▅▄▄▄▅▄▅▄█▅▅▄▅▄▄▄▆▄▄▃▃▂▂▃▄▄▂▂▁▄▂▁▁▁▁▁▁▂▃▂▃▃1.0961.091.7451.4171.2281.281.561.3841.6651.0912.7771.4421.6261.151.4961.1041.2981.191.8951.1151.0630.7850.8820.6010.6540.8181.0881.1790.5050.6280.2771.0570.5570.2360.2080.1910.1880.2060.0870.3540.9030.6510.8350.853NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▅▆▆▆▇█▆▇▇▇▆▆▅▇▅▇▅▆▅▆▄▆▂▄▄▅▁█-7.024-4.974-5.241-4.416-3.301-1.578-3.866-2.528-2.836-2.261-4.22-4.282-6.513-2.386-7.207-2.879-6.602-4.088-7.13-5.028-7.55-4.908-11.932-7.534-8.204-5.808-13.212-1.267NANA-6.504-10.65-10.782-9.183-10.223-13.13-11.347-23.31-14.886-19.305-31.874-33.354-43.489-31.125NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▇▅▅▅▅▄▅▆▅▆▅▃▅█▅▅▆▅▅▅▅▅▆▆▆▅▅-84.47339.2450.292-3.0974.39-0.421-21.489-0.17113.93-0.19320.3420.076-38.6140.061.051-0.151-9.12812.0183.419-0.0158.576.528-2.92515.00711.13310.061-3.8020.317NANA25.936.59316.938-0.48924.5280.04.623.25813.8787.30649.35912.09535.3663.895NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31

Common Stock Value

us-gaap:CommonStockValue us-gaap:StatementClassOfStock

us-gaap:CommonStockValue

us-gaap:CommonStock


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312012-03-312011-12-312011-09-302011-06-302010-12-31
Value179000.0179000.0167000.0167000.0167000.0167000.0146000.0145000.0145000.0145000.0145000.0127000.0126000.0126000.0126000.0105000.0103000.098000.097000.095000.095000.091000.090000.090000.089000.087000.086000.086000.076000.064000.054000.035000.030000.030000.029000.029000.029000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Shares Outstanding

us-gaap:SharesOutstanding us-gaap:StatementEquityComponents

us-gaap:SharesOutstanding

us-gaap:CommonStock


Shares
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value17931791167416701670166714641451145114501446126512641263126111061038998844489353309291136
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

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1791167916701668155714521647164016321287142712631437125113451128111310861080124910411037123412051000119211899048497796734964724240.392344379357312295294293291287282275
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value17911679167016681557145214511450144812871264126312621251116911281113108610801049104110371031100910009939879048497796734964724240.392344379357312295294293291287282275
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312018-06-302017-06-302017-03-312016-09-302016-03-312015-03-31
Value7.35.54.34.47.2150190212195204199
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-0.01-0.02-0.02-0.01-0.01-0.02-0.030.0100.02-0.070.01-0.010.07-0.020.04-0.09-0.02-0.1100.01-0.03-0.030.020.2-0.130.090.13-0.48-0.29-0.36-0.3-0.25-0.05-0.05-0.1-0.07-0.07-0.110-0.05-0.02-0.05-0.09-0.07-0.13
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-0.01-0.02-0.02-0.01-0.01-0.02-0.03-0.010.010.02-0.070.01-0.010.06-0.020.04-0.09-0.02-0.1100.01-0.03-0.030.020.17-0.130.080.11-0.48-0.29-0.36-0.3-0.25-0.05-0.05-0.1-0.07-0.07-0.110-0.05-0.02-0.05-0.09-0.07-0.13
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-24.607-33.091-25.073-25.037-26.104-32.92-37.611225.69125-96.1539.519-4.38287-22.37951-98.779-20.982-116.274-2.49313-27.598-27.29323205-131.01789128-432.875-251.776-232.07-204.417-126.353-25.648-19.278-40.069-27.443-24.066-36.4-0.815-14.321-6.22
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-81.3-122.90.0-76.4-86.0-102.3-118.157.318.284.8-301.026.7-13.0304.7-76.0169.1-351.2-85.1-476.6-9.852.5-126.4-119.999.2891.3-623.2403.4549.9-1804.1-1226.0-1105.4-906.5-637.0-132.7-101.1-195.1-137.3-143.8-209.4-4.5-75.4-34.1

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService

us-gaap:CostOfGoodsAndServicesSold

us-gaap:Product


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
Value2.8582.8993.6534.0322.942.6434.5544.4823.5783.1493.6734.4264.172.1722.1652.9052.778
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.410.80.012.39.78.214.311.611.510.511.512.412.47.67.49.59.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Product61.375.40.092.289.881.10.0100.479.779.50.076.472.879.30.066.272.7

us-gaap:Service


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
Value9.1239.0778.7968.588.6478.7288.9929.2169.3959.8539.6649.4299.5269.0299.6979.3159.036
Percentage of CostOfGoodsAndServicesSold319.2313.1240.8212.8294.1330.2197.5205.6262.6312.9263.1213.0228.4415.7447.9320.7325.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax30.133.70.026.228.527.128.223.930.132.830.326.428.231.433.030.632.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Service35.639.30.030.231.930.20.027.035.237.70.031.534.034.70.035.737.2

Costs And Expenses

us-gaap:CostsAndExpenses

us-gaap:CostsAndExpenses


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value464648474546485047485053314159414039414041373839403854414941474539373838633139393531453126
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax152.9171.50.0144.7150.6143.8153.6131.1153.4160.9157.6150.394.2145.1202.9135.4144.5161.7168.9157.8165.4171.9169.9167.9175.7181.7245.7177.2204.3200.2227.8200.1198.8195.1199.7186.0317.2189.2228.1217.6188.5169.9274.3173.1151.0

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


Gains
Period End2021-06-302018-12-312018-09-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value2.6640.00.00.00.0-6.3060.00.00.00.00.0-2.189-0.065-0.231-12.936-16.484-10.1951.717-63.569-47.24
Percentage of GainsLossesOnExtinguishmentOfDebt100.00.00.00.00.0100.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.80.00.00.00.0-20.70.00.00.00.00.0-9.5-0.3-1.0-55.2-68.7-49.68.2-281.9-238.2

us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument

gsat:PaycheckProtectionProgramLoanCARESAct


Gains
Period End2021-06-30
Value5.0
Percentage of GainsLossesOnExtinguishmentOfDebt187.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gsat:PaycheckProtectionProgramLoanCARESAct0.0

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense us-gaap:CounterpartyName

us-gaap:GeneralAndAdministrativeExpense

gsat:ThermoCapitalPartnersLlc


General
Period End2021-06-302021-03-312020-06-30
Value200000.0200000.0100000.0
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.70.70.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gsat:ThermoCapitalPartnersLlc0.00.00.0

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-21.095-36.256-21.241-24.888-24.646-38.202-37.326216.24625-96.4449.07-6.98887-22.60452-98.628-20.125-117.202-8.8813-26.756-25.87324204-129.49991129-432.758-250.348-233.999-204.851-126.153-24.975-18.9-41.132-27.385-24.368-33.985-0.703-13.987-6.358-17.794-24.485-19.214
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-69.7-134.60.0-76.0-81.2-118.7-117.254.820.085.8-301.925.4-20.7306.0-76.8172.3-350.7-81.6-480.4-34.854.4-122.5-113.6102.3889.9-616.0414.8552.4-1803.6-1219.1-1114.6-908.5-636.0-129.2-99.2-200.3-137.1-145.6-195.5-3.9-73.6-34.8-107.7-134.4-109.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value354000.077000.0493000.058000.090000.021000.0421000.040000.057000.027000.09000.051000.024000.041000.0-19000.067000.0106000.036000.019000.0-6300000.0-450000.0191000.0943000.0115000.0106000.0228000.0-374000.089000.0972000.0193000.0797000.0118000.0119000.0103000.052000.056000.0148000.0157000.0-276000.0-22000.081000.0108000.0289000.08000.035000.0
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.20.30.00.20.30.11.30.10.20.10.00.10.10.1-0.10.20.40.10.1-24.7-1.80.94.10.50.51.1-1.70.44.10.93.80.50.60.50.30.30.70.9-1.6-0.10.40.61.70.00.2

Interest Income Expense Nonoperating Net

us-gaap:InterestIncomeExpenseNonoperatingNet

us-gaap:InterestIncomeExpenseNonoperatingNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-03-31
Value-10778000.0-11574000.0-11513000.0-11398000.0-11508000.0-14010000.0-22315000.0-14471000.0-12808000.0-12870000.0-12596000.0-13358000.0-10305000.0-7353000.0-8139000.0-8954000.0-8850000.0-8828000.0-8932000.0-8866000.0-9049000.0-9105000.0-9074000.0-9019000.0-9244000.0-8517000.0-9380000.0-9067000.0-13864000.0-10921000.0-27959000.0-16901000.0-15216000.0-7752000.0-8090000.0-6565000.0-3781000.0-3050000.0-1212000.0
Percentage of InterestIncomeExpenseNonoperatingNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-35.6-43.00.0-34.8-37.9-43.5-70.1-37.5-41.1-42.8-39.4-37.4-30.6-25.6-27.7-29.4-31.5-35.8-36.6-34.7-36.1-41.7-39.9-38.1-40.2-40.5-42.5-38.7-57.8-53.2-133.2-75.0-76.7-40.1-42.4-32.0-18.9-18.2-6.6

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3.9370.044.9070.045.930.041140.04120.0130.039120.03912
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.00.10.00.119.50.145.30.141.30.043.10.135.70.142.1

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-21.449-36.333-21.734-24.946-24.736-38.223-37.747216.18925-96.4539.019-7.01287-22.58552-98.734-20.161-117.221-2.57714-26.947-26.81624204-129.72792129-433.73-250.541-234.797-204.969-126.272-25.078-18.952-41.188-27.533-24.525-33.709-0.681-14.068-6.466-18.083-24.493-19.249-35.642
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-70.8-134.90.0-76.2-81.5-118.7-118.654.719.885.7-301.925.3-20.8305.9-76.7172.1-351.1-81.8-480.5-10.156.2-123.4-117.8101.8889.4-617.1416.5552.0-1807.7-1220.0-1118.4-909.0-636.6-129.7-99.4-200.6-137.8-146.5-193.9-3.7-74.0-35.4-109.4-134.4-109.2-228.9

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-21.449-36.333-24.946-24.736-38.223216.189259.019-7.01287
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-70.8-134.9-76.2-81.5-118.754.719.885.725.3-20.8305.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-30
Value-23.952-25.019-24.729-38.223-35.463-24.2261030-106.77513-7.01290-31.50555-98.734-20.161-126.0570.42617-23.91726207
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0-76.4-81.4-118.7-111.4-62.734.7100.7-334.237.6-20.8314.2-107.1181.6-351.1-81.8-516.71.767.9-105.1113.8901.3

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense

us-gaap:NonoperatingIncomeExpense


Nonoperating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-5.087-16.996-6.177-10.253-9.267-24.117-20.272332244-78.03727-8.9361007.67763-86.118-4.923-100.3985.88330-11.058-9.9640222-112.314123147-407.723-229.773-207.167-182.277-106.552-6.5850.104-23.47716-9.438-11.716202.8316.40211-11.172-10.23
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-16.8-63.10.0-31.3-30.5-74.9-63.785.973.4146.7-244.375.7-26.5351.126.1207.7-306.2-20.0-411.623.0119.8-50.6-43.7170.2965.5-534.3560.5629.5-1699.3-1118.9-986.8-808.4-537.2-34.10.5-114.380.2-56.4-67.4113.714.935.166.7-61.3-58.1

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-16.008-19.26-15.064-14.635-15.379-14.085-17.054-12.005-16.656-18.331-18.407-17.9621.948-12.958-30.281-10.793-12.51-15.202-16.804-14.763-16.411-15.698-15.913-16.089-17.417-17.185-32.192-18.093-25.035-20.575-26.832-22.574-19.601-18.39-19.004-17.655-43.404-14.93-22.269-21.388-16.818-12.76-28.811-13.313-8.984
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-52.9-71.50.0-44.7-50.6-43.8-53.6-31.1-53.4-60.9-57.6-50.35.8-45.1-102.9-35.4-44.5-61.7-68.9-57.8-65.4-71.9-69.9-67.9-75.7-81.7-145.7-77.2-104.3-100.2-127.8-100.1-98.8-95.1-99.7-86.0-217.2-89.2-128.1-117.6-88.5-69.9-174.3-73.1-51.0

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-3158000.03242000.0-91000.0-1368000.05303000.01022000.0-498000.0-270000.0500000.02630000.0-330000.0
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-10.412.0-0.3-4.516.52.6-1.6-0.91.47.8-1.1

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-3158000.03242000.0-91000.0-1368000.05303000.01022000.0-498000.0-270000.0500000.02630000.0-330000.0
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-10.412.0-0.3-4.516.52.6-1.6-0.91.47.8-1.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-88000.022000.0-2643000.0-346000.0-233000.0-333000.0-750000.0-2529000.0474000.0-9000.0-617000.01331000.0-3351000.0-662000.0-433000.0-314000.0-2102000.0-24000.0151000.0-505000.0685000.0-609000.01501000.0-1953000.0-452000.04133000.0831000.02586000.0-1092000.0713000.0-1837000.0-1540000.0-224000.0642000.0-1342000.0-439000.0-632000.0132000.0-255000.0-1876000.0125000.01179000.012000.0-883000.0-1132000.0
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.30.10.0-1.1-0.8-1.0-2.4-6.51.5-0.0-1.93.7-9.9-2.3-1.5-1.0-7.5-0.10.6-2.02.7-2.86.6-8.2-2.019.73.811.0-4.63.5-8.8-6.8-1.13.3-7.0-2.1-3.20.8-1.5-10.30.76.50.1-4.8-6.4

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value30263332303231383130313533282930282424252521222323212223232020221919192019161718181816181715
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService

gsat:CommercialloT


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value4.5044.4814.424.2984.314.5264.3533.6983.5423.2163.089
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.916.613.514.213.411.714.012.39.99.510.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.916.613.514.213.411.714.012.39.99.510.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gsat:CommercialloT100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gsat:OtherServicesNonrecurringEngineeringServicesNRE


Revenue
Period End2020-09-302020-06-302020-03-31
Value2.02.04.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.16.612.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.16.612.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gsat:OtherServicesNonrecurringEngineeringServicesNRE100.0100.0100.0

gsat:ProductDuplex


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.3310.2930.3440.510.6250.4040.4190.3490.3060.2510.4030.4320.750.4310.4660.7770.6120.899
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.11.11.01.62.11.31.30.91.00.81.31.22.21.51.62.62.23.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.11.11.01.62.11.31.30.91.00.81.31.22.21.51.62.62.23.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gsat:ProductDuplex100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gsat:ProductOther


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.0110.1140.0430.0040.0150.035-0.0330.0510.0270.0450.010.0320.0910.0010.078-0.044-0.007-0.01
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.40.10.00.00.1-0.10.10.10.10.00.10.30.00.3-0.1-0.0-0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.40.10.00.00.1-0.10.10.10.10.00.10.30.00.3-0.1-0.0-0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gsat:ProductOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gsat:ProductSPOT


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2.231.9152.4722.6021.6951.4071.961.882.1861.5911.8342.8711.9081.4330.9331.411.8151.236
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.47.17.57.95.64.46.24.97.05.35.78.05.75.03.24.66.55.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.47.17.57.95.64.46.24.97.05.35.78.05.75.03.24.66.55.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gsat:ProductSPOT100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gsat:ServicesDuplex


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value7.2436.6557.7039.9568.5567.6639.414169.0318.6451012108.78310109.3227.598
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax23.924.723.230.428.223.829.643.029.028.731.634.230.030.634.534.733.130.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax23.924.723.230.428.223.829.643.029.028.731.634.230.030.634.534.733.130.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gsat:ServicesDuplex100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gsat:ServicesIGO


Revenue
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.0950.1090.0910.0130.1390.1790.1660.250.2570.2160.2090.2210.260.3760.211
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.40.30.00.40.60.60.80.70.60.70.80.91.30.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.40.30.00.40.60.60.80.70.60.70.80.91.30.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gsat:ServicesIGO100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gsat:ServicesOther


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2.7310.9662.5182.5484.7480.3280.4160.5180.5150.6550.9290.5610.9670.5721.0820.8840.859
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.03.67.78.414.71.01.11.71.72.12.61.73.41.93.63.13.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.03.67.78.414.71.01.11.71.72.12.61.73.41.93.63.13.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gsat:ServicesOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gsat:ServicesSPOT


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value111011111112121212131212131212111110
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax36.840.834.134.838.137.738.532.340.543.539.436.341.145.142.836.939.842.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax36.840.834.134.838.137.738.532.340.543.539.436.341.145.142.836.939.842.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gsat:ServicesSPOT100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gsat:SubscriberEquipmentCommercialloT


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value2.091.5211.2560.9391.4132.1821.9722.0722.3562.8780.833
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.95.63.83.14.45.76.36.96.68.52.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.95.63.83.14.45.76.36.96.68.52.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax gsat:SubscriberEquipmentCommercialloT100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Product


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value4.6623.8434.3914.3723.2743.2595.424.4624.4913.9594.765.7945.7312.7392.8054.3893.8223.171
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.414.313.213.310.810.117.011.614.413.214.916.217.09.59.514.413.612.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.414.313.213.310.810.117.011.614.413.214.916.217.09.59.514.413.612.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Product100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Service


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
Value2523282827282634262627292726262624
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax84.685.786.886.789.289.983.088.485.686.885.183.883.090.590.585.686.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax84.685.786.886.789.289.983.088.485.686.885.183.883.090.590.585.686.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Service100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:Product, country:CA


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.1180.7490.8930.9060.8591.0831.3961.291.1330.8121.0791.1210.7930.350.7310.7220.8280.715
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.72.82.72.82.83.44.43.33.62.73.43.12.41.22.52.42.92.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.72.82.72.82.83.44.43.33.62.73.43.12.41.22.52.42.92.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Product country:CA100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Product, country:US


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2.4382.1722.4052.6571.7211.4432.7422.4352.5492.2112.343.4143.461.5951.3962.9212.3341.781
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.18.17.38.15.74.58.66.38.27.47.39.610.35.54.79.68.37.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.18.17.38.15.74.58.66.38.27.47.39.610.35.54.79.68.37.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Product country:US100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Product, gsat:OtherCountries


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.0080.0220.0130.0180.012-0.0270.0230.0210.020.0470.0580.1240.10.0170.0030.0150.0080.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.10.00.10.0-0.10.10.10.10.20.20.30.30.10.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.10.00.10.0-0.10.10.10.10.20.20.30.30.10.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Product gsat:OtherCountries100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:Product, srt:Europe


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
Value0.5270.4790.4430.3260.3760.4940.3190.3710.440.5770.9070.7651.040.3890.3410.4160.358
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.71.81.31.01.21.51.01.01.41.92.82.13.11.41.21.41.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.71.81.31.01.21.51.01.01.41.92.82.13.11.41.21.41.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Product srt:Europe100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Product, srt:LatinAmerica


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
Value0.5710.4210.6370.4650.3060.2660.940.3450.3490.3120.3760.370.3380.3880.3340.3150.294
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.91.61.91.41.00.83.00.91.11.01.21.01.01.31.11.01.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.91.61.91.41.00.83.00.91.11.01.21.01.01.31.11.01.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Product srt:LatinAmerica100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Service, country:CA


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
Value4.3763.834.3325.5224.3923.9714.6527.9144.3313.8115.1835.7234.7944.4864.8555.2834.457
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.514.213.116.914.512.314.620.513.912.716.216.014.215.616.517.315.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.514.213.116.914.512.314.620.513.912.716.216.014.215.616.517.315.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Service country:CA100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Service, country:US


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1816211920221823191919212018181716
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax60.261.165.260.965.970.559.260.062.464.060.559.159.663.963.958.559.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax60.261.165.260.965.970.559.260.062.464.060.559.159.663.963.958.559.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Service country:US100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Service, gsat:OtherCountries


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
Value0.3410.3210.2760.2250.2220.2040.1760.1520.1350.370.1140.090.0790.3290.1080.1260.124
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.11.20.80.70.70.60.60.40.41.20.40.30.21.10.40.40.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.11.20.80.70.70.60.60.40.41.20.40.30.21.10.40.40.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Service gsat:OtherCountries100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Service, srt:Europe


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
Value1.8571.7111.8312.0571.7911.3612.0432.2512.2122.1222.0772.4622.4042.2462.0792.152.223
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.16.45.56.35.94.26.45.87.17.16.56.97.17.87.17.17.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.16.45.56.35.94.26.45.87.17.16.56.97.17.87.17.17.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Service srt:Europe100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Service, srt:LatinAmerica


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
Value0.8150.7810.7150.6230.6690.710.6990.680.570.5640.4750.5270.6120.5690.7680.7010.84
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.72.92.21.92.22.22.21.81.81.91.51.51.82.02.62.33.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.72.92.21.92.22.22.21.81.81.91.51.51.82.02.62.33.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Service srt:LatinAmerica100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value30263332303231383130313533282930282424252521222323212223232020221919192019161718181816181715
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:SellingGeneralAndAdministrativeExpense


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value9.68110101010119.7112111113151511109.6169.5449.491010118.618.9889.675108.5968.7218.7838.2477.7697.3099.0796.5776.9247.7749.288.7638.5228.432121110101210
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax32.037.531.130.733.834.530.533.435.338.641.242.247.339.235.531.633.938.544.539.445.639.439.540.944.140.939.537.534.437.834.840.333.235.840.845.243.950.948.567.460.955.864.070.957.4

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value87591388891092393996510191037104410451057106811261129110711091133113211481156116712321267126012581268131913271349137213891374139014031404141714241420140614161386
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value87591388891092393996510191037104410451057106811261129110711091133113211481156116712321267126012581268131913271349137213891374139014031404141714241420140614161386
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value41243542344647049540741639238535839238138329119791155161254256216237263223-39.57878-14.532-204.454-74.276116266421469494484521533533551550535595445
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets47.147.747.649.050.952.742.240.837.936.934.337.135.734.125.817.88.213.714.322.222.118.619.220.817.8-3.16.2-1.1-15.4-5.58.519.230.633.835.234.536.837.537.639.238.938.60.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value-2.860.298-2.9440.3950.4861.854-3.449-3.585-4.607-4.109-3.839-4.139-4.639-7.269-6.939-6.199-5.378-6.325-6.409-5.484-4.833-4.356-3.741-2.8980.871-1.758-3.1-0.268-1.718-6.304
Percentage of StockholdersEquity-0.70.1-0.70.10.10.4-0.8-0.9-1.2-1.1-1.1-1.1-1.2-1.9-2.4-4.0-3.3-2.5-2.5-2.5-2.0-1.7-1.7-3.70.7-0.4-0.6-0.1-0.3-1.4
Percentage of Assets-0.30.0-0.30.00.10.2-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.6-0.6-0.5-0.5-0.6-0.6-0.5-0.4-0.3-0.3-0.20.1-0.1-0.2-0.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value2143214220962094209320921970194119401938193718741873187118691649159115031074864792736700480
Percentage of StockholdersEquity520.1491.7495.6469.1445.0422.6483.6466.5493.8503.0539.7478.0491.2487.4641.91019.2671.11905.3920.6174.7148.5137.5117.6107.8
Percentage of Assets244.7234.6236.1230.1226.7222.8204.0190.3187.1185.5185.3177.2175.3166.1165.5145.6129.1118.578.361.655.853.10.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value0.1790.1790.1670.1670.1670.1670.1460.1450.1450.1450.1450.1270.1260.1260.1260.110.1030.0990.0850.0490.0350.0310.0290.014
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.00.10.10.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value-1728.506-1707.057-1670.724-1648.99-1624.044-1599.308-1559.401-1521.654-1542.765-1548.954-1574.725-1478.272-1487.291-1480.279-1571.302-1482.228-1349.582-1421.904-959.038-367.922-255.724-200.8-103.333-28.41
Percentage of StockholdersEquity-419.4-391.8-394.9-369.3-345.2-323.0-382.8-365.7-392.7-401.9-438.7-377.0-390.0-385.5-539.6-916.0-569.1-1801.8-821.4-74.4-47.9-37.5-17.3-6.4
Percentage of Assets-197.4-186.9-188.1-181.1-175.8-170.3-161.5-149.2-148.8-148.2-150.6-139.7-139.2-131.4-139.1-130.9-109.5-112.1-69.9-26.2-18.0-14.50.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value711126873656163146143133122115102144136483850384442423859494944807881816813413115415071686985119118
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.212.37.78.17.16.56.614.413.812.711.710.99.512.812.14.33.44.43.43.93.63.63.14.73.94.03.56.15.96.15.94.99.89.411.010.85.04.84.96.18.48.6

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value158.369131912107.6062625131520124841168.83823101211117.4762712137.121272319176.6436.2371.3111.2194.827.7359.9516.08248.2543357876712
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.80.91.52.11.31.10.82.62.41.31.51.91.24.33.71.50.82.10.91.11.01.00.62.21.01.10.62.11.81.51.30.50.50.10.80.10.30.50.70.41.70.02.40.00.00.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312014-12-31
Value6610668746661598785747573651121055446614850494545
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.611.77.78.27.26.66.18.68.37.17.26.96.110.09.34.94.25.44.34.44.33.73.6

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value28282221192121202220192019171717151215161614141416151516161515161413111112131513
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.33.12.52.42.12.32.32.12.21.91.81.91.91.51.51.61.41.11.31.41.41.21.21.11.31.21.21.21.31.21.11.21.11.00.80.80.90.91.11.0

us-gaap:AccountsReceivableNetCurrent us-gaap:ProductOrService

gsat:IGO


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1.82.31.96.46.36.16.56.08.27.57.89.18.58.1
Percentage of AccountsReceivableNetCurrent6.28.18.629.931.928.329.928.736.637.440.444.542.747.2
Percentage of Assets0.20.30.20.70.70.60.70.60.80.70.70.90.80.7
Percentage of Assets gsat:IGO0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

gsat:ProcurementOfGoodsAndPerformingServicesForCustomer


Accounts
Period End2021-06-302021-03-312020-12-31
Value10104.7
Percentage of AccountsReceivableNetCurrent35.736.121.2
Percentage of Assets1.21.10.5
Percentage of Assets gsat:ProcurementOfGoodsAndPerformingServicesForCustomer0.00.00.0

Inventory Net

us-gaap:InventoryNet

us-gaap:InventoryNet


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1112131515161617141414137.7427.6717.2738.5048.8148.8518.0939.7319.698111212111314292829313738394243414141505555
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.31.41.51.71.71.71.71.71.41.41.41.20.70.70.60.80.80.80.70.80.81.01.01.01.01.11.22.22.22.22.32.72.82.93.03.12.92.92.93.63.94.0

us-gaap:InventoryNet us-gaap:PublicUtilitiesInventory

gsat:GroundInfrastructureAssets


Inventory
Period End2020-12-312019-12-312018-12-312017-12-31
Value4.34.35.70.0
Percentage of InventoryNet31.326.339.90.0
Percentage of Assets0.50.40.50.0
Percentage of Assets gsat:GroundInfrastructureAssets0.00.00.00.0

gsat:PurchasedProductsSubscriberEquipmentDevices


Inventory
Period End2020-12-312019-12-312018-12-312017-12-31
Value9.5128.67.3
Percentage of InventoryNet69.273.460.2100.4
Percentage of Assets1.11.20.80.6
Percentage of Assets gsat:PurchasedProductsSubscriberEquipmentDevices0.00.00.00.0

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value15151513141316202024138.88.8796.5266.7455.6855.1894.8294.5885.5715.034.4014.4565.7197.7227.2837.7487.4566.9137.4157.0597.5836.445.3275.2335.785125.1285.2817.021145.061
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.81.71.81.51.51.41.82.12.02.31.30.80.80.60.60.50.50.40.40.50.40.40.40.50.60.60.60.60.50.50.50.50.50.40.40.40.90.40.40.51.00.4

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2021-06-302021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value157015651561154815511547154715441548154815541555155015601555156615581550154115341521151014991490148614741466146214601454145114431418140913961362
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets179.3171.4175.8164.9160.7151.8149.3147.8148.1146.3145.5138.1137.3140.9140.2138.1137.6135.0133.3131.4123.4119.2119.0118.5117.2111.7110.5108.3106.4104.7105.6103.8101.0100.498.595.9

us-gaap:PropertyPlantAndEquipmentGross gsat:PropertyPlantAndEquipmentAdditionalDisclosures, us-gaap:MajorPropertyClass, us-gaap:PropertyPlantAndEquipmentByType

gsat:FirstandSecondGenerationSatellites, gsat:GlobalStarSystem, gsat:SpaceComponent


Property
Period End2021-06-302021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value119511951195119511951195119511951195119511951195119511951195121112111211121112111211121112111211
Percentage of PropertyPlantAndEquipmentGross76.176.476.677.277.177.277.277.477.277.276.976.877.176.676.877.377.778.178.679.079.680.280.881.5
Percentage of Assets136.5130.9134.6127.3123.8117.2115.3114.4114.3113.0111.9106.1105.9107.9107.7106.8106.9105.4104.7103.898.395.696.295.5
Percentage of Assets gsat:FirstandSecondGenerationSatellites gsat:GlobalStarSystem gsat:SpaceComponent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

gsat:SecondGenerationSatelliteOnGroundSpare, gsat:GlobalStarSystem, gsat:SpaceComponent


Property
Period End2021-06-302021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value3232323232323232323232323232323232323232323232323232323232
Percentage of PropertyPlantAndEquipmentGross2.12.12.12.12.12.12.12.12.12.12.12.12.12.12.12.12.12.12.12.12.12.22.22.22.22.22.22.22.2
Percentage of Assets3.73.63.73.53.43.23.13.13.13.13.02.92.92.92.92.92.92.82.82.82.62.62.62.62.62.52.42.42.4
Percentage of Assets gsat:SecondGenerationSatelliteOnGroundSpare gsat:GlobalStarSystem gsat:SpaceComponent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

gsat:SecondGenerationSatellites, gsat:GlobalStarSystem, gsat:SpaceComponent


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value1195119511951195121112111211121112121212121212121212934
Percentage of PropertyPlantAndEquipmentGross76.677.177.277.177.779.681.381.582.282.682.983.083.365.9
Percentage of Assets134.6123.8114.3105.9106.998.396.395.591.891.389.888.387.266.6
Percentage of Assets gsat:SecondGenerationSatellites gsat:GlobalStarSystem gsat:SpaceComponent0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConstructionInProgress, gsat:GlobalStarSystem, gsat:GroundComponent


Property
Period End2021-06-302021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-31
Value1615191616121210181671231227221217212207197190186177166154146141129121118116109106105848480
Percentage of PropertyPlantAndEquipmentGross1.11.01.21.11.00.80.80.71.21.14.614.914.714.214.013.613.312.812.312.211.711.010.39.99.58.88.38.18.07.57.37.36.06.05.9
Percentage of Assets1.91.72.21.81.71.21.21.01.71.66.720.620.120.019.618.718.317.216.516.014.413.112.311.711.29.89.18.88.57.97.77.66.06.05.6
Percentage of Assets us-gaap:ConstructionInProgress gsat:GlobalStarSystem gsat:GroundComponent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConstructionInProgress, gsat:GlobalStarSystem, us-gaap:PropertyPlantAndEquipmentOtherTypes


Property
Period End2021-06-302021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-31
Value6.0894.333.2981.7161.4331.2771.4581.5852.6992.3071.7121.6712.5722.7061.9171.6292.2992.5172.3758.4955.5934.9893.5953.2162.4581.8111.4451.2321.1150.7991717171818
Percentage of PropertyPlantAndEquipmentGross0.40.30.20.10.10.10.10.10.20.10.10.10.20.20.10.10.10.20.20.60.40.30.20.20.20.10.10.10.10.11.21.21.31.31.3
Percentage of Assets0.70.50.40.20.10.10.10.20.30.20.20.10.20.20.20.10.20.20.20.70.50.40.30.30.20.10.10.10.10.11.31.31.31.31.3
Percentage of Assets us-gaap:ConstructionInProgress gsat:GlobalStarSystem us-gaap:PropertyPlantAndEquipmentOtherTypes0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PropertyPlantAndEquipmentGross us-gaap:MajorPropertyClass

gsat:GlobalStarSystem


Property
Period End2021-06-302021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-31
Value15311526152315161518151315141511150715061512152315181530152315341528151815101503149114781466145814531440143214291427142114181410138513771330
Percentage of PropertyPlantAndEquipmentGross97.597.597.597.997.997.897.897.997.497.397.397.998.098.097.998.098.198.097.998.098.097.997.897.897.897.797.797.897.897.797.797.797.797.797.7
Percentage of Assets174.8167.2171.5161.5157.3148.4146.0144.6144.2142.4141.6135.2134.5138.1137.3135.4135.0132.2130.5128.8121.0116.7116.4115.9114.6109.2108.0105.9104.0102.3103.2101.598.798.193.7
Percentage of Assets gsat:GlobalStarSystem0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PropertyPlantAndEquipmentGross us-gaap:MajorPropertyClass, us-gaap:PropertyPlantAndEquipmentByType

gsat:GlobalStarSystem, gsat:GroundComponent


Property
Period End2021-06-302021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312014-12-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-31
Value280279272265269268269269256257211484848484848484846474848484848494949
Percentage of PropertyPlantAndEquipmentGross17.817.817.517.217.417.417.417.416.616.713.63.13.13.13.13.13.13.13.13.13.23.33.33.33.33.43.53.53.6
Percentage of Assets32.030.630.728.327.926.326.025.824.624.419.84.34.34.44.44.34.34.24.23.83.83.63.53.53.53.53.53.53.5
Percentage of Assets gsat:GlobalStarSystem gsat:GroundComponent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

us-gaap:Equipment


Property
Period End2021-06-302021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value119.3359.6798.6738.73110109.773101010109.9669.371109.9689.87511111110121212121212121212121212121212
Percentage of PropertyPlantAndEquipmentGross0.70.60.60.60.60.70.70.60.70.70.70.70.60.60.70.60.60.80.80.70.70.80.80.90.90.90.90.80.80.90.90.90.90.90.90.9
Percentage of Assets1.31.01.10.90.91.01.00.91.01.01.00.90.90.80.90.90.91.01.01.00.91.01.01.01.01.00.90.90.90.90.90.90.90.90.90.9
Percentage of Assets us-gaap:Equipment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LandAndBuilding


Property
Period End2021-06-302021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value1.2253.0493.113.0953.2873.2593.3233.3043.3113.1413.1743.323.3223.3693.3193.3653.333.3333.3433.2433.1513.1273.4083.3713.593.7193.8663.823.7683.8373.8484.0044.0034.0213.9744.152
Percentage of PropertyPlantAndEquipmentGross0.10.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.30.30.30.30.30.30.30.30.30.30.3
Percentage of Assets0.10.30.40.30.30.30.30.30.30.30.30.30.30.30.30.30.30.30.30.30.30.20.30.30.30.30.30.30.30.30.30.30.30.30.30.3
Percentage of Assets us-gaap:LandAndBuilding0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LeaseholdImprovements


Property
Period End2021-06-302021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value1.6751.671.6551.6361.6331.6441.5721.3211.4782.0031.971.9691.9691.9261.941.8961.8931.7321.7311.6851.6711.671.6831.6771.621.6621.6721.6551.6441.5071.4991.5041.5121.4811.4061.402
Percentage of PropertyPlantAndEquipmentGross0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets0.20.20.20.20.20.20.20.10.10.20.20.20.20.20.20.20.20.20.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets us-gaap:LeaseholdImprovements0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:SoftwareAndSoftwareDevelopmentCosts


Property
Period End2021-06-302021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value252423181819181826252516161516151514141414141515151515151415141414141314
Percentage of PropertyPlantAndEquipmentGross1.61.61.51.21.21.21.21.21.71.71.71.11.01.01.11.01.00.91.01.01.01.01.01.01.01.11.11.01.01.01.01.01.01.01.01.0
Percentage of Assets2.92.72.72.02.01.91.81.82.52.42.41.51.41.41.51.41.31.31.31.31.21.21.21.21.21.21.21.11.11.11.11.11.01.01.01.0
Percentage of Assets us-gaap:SoftwareAndSoftwareDevelopmentCosts0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Construction In Progress Gross

us-gaap:ConstructionInProgressGross gsat:PropertyPlantAndEquipmentAdditionalDisclosures, us-gaap:MajorPropertyClass, us-gaap:PropertyPlantAndEquipmentByType

us-gaap:ConstructionInProgressGross

gsat:NewGatewayAntennas, gsat:GlobalStarSystem, gsat:GroundComponent


Construction
Period End2020-12-31
Value7900000.0
Percentage of ConstructionInProgressGross100.0
Percentage of Assets0.9
Percentage of Assets gsat:NewGatewayAntennas gsat:GlobalStarSystem gsat:GroundComponent0.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value681695715734754775799820843864882903935958971100010131027103910481059107010771083109011001113112011311149116911871207122112151226123112321217120511781150
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets77.876.280.680.681.782.582.880.481.482.784.485.587.585.086.090.491.390.691.891.391.691.787.485.586.587.487.884.985.385.185.285.487.987.886.687.386.986.585.785.783.283.0

us-gaap:PropertyPlantAndEquipmentNet us-gaap:StatementGeographical

country:CA


Property
Period End2020-12-312019-12-312018-12-312017-12-312017-03-312016-12-312016-09-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value1112120.7730.6570.670.6750.5880.510.4670.410.3260.3570.3180.2790.2390.2470.2210.2240.2420.277
Percentage of PropertyPlantAndEquipmentNet1.71.51.40.10.10.10.10.10.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets1.31.31.20.10.10.10.10.10.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets country:CA0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

country:US


Property
Period End2020-12-312019-12-312018-12-312017-12-312017-03-312016-12-312016-09-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value6877728529661022103510431066107310791085109611081114112611431164181120212151209
Percentage of PropertyPlantAndEquipmentNet96.096.696.599.599.699.699.699.699.699.699.699.699.699.599.599.599.515.399.599.599.5
Percentage of Assets77.480.081.585.690.291.490.991.387.185.286.187.187.484.584.984.784.813.187.587.486.2
Percentage of Assets country:US0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

gsat:OtherCountries


Property
Period End2020-12-312019-12-312018-12-312017-12-312017-03-312016-12-312016-09-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value0.0090.2650.2510.2510.2330.2260.2380.3990.4570.5270.6360.7020.8060.9241.0231.1011.1771.2731.3451.4611.568
Percentage of PropertyPlantAndEquipmentNet0.00.00.00.00.00.00.00.00.00.00.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets gsat:OtherCountries0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:Europe


Property
Period End2020-12-312019-12-312018-12-312017-12-31
Value3.173.1263.4250.433
Percentage of PropertyPlantAndEquipmentNet0.40.40.40.0
Percentage of Assets0.40.30.30.0
Percentage of Assets srt:Europe0.00.00.00.0

srt:LatinAmerica


Property
Period End2020-12-312019-12-312018-12-312017-12-31
Value1311143.051
Percentage of PropertyPlantAndEquipmentNet1.91.51.60.3
Percentage of Assets1.51.21.40.3
Percentage of Assets srt:LatinAmerica0.00.00.00.0

Indefinite Lived Intangible Assets Excluding Goodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill


Indefinite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value2118197.95.64.41.7
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.41.91.90.70.50.40.1

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2020-12-312019-12-312018-12-31
Value272525
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0
Percentage of Assets3.12.62.4

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312013-12-312012-12-31
Value6024000.06920000.05243000.01972000.01282000.01023000.01777000.0
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.70.50.20.10.10.1

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

gsat:RegulatoryAuthorizations


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1184000.01460000.0957000.0822000.00
Percentage of FiniteLivedIntangibleAssetsNet19.721.118.341.70.0
Percentage of Assets0.10.20.10.10.0
Percentage of Assets gsat:RegulatoryAuthorizations0.00.00.00.00.0

us-gaap:DevelopedTechnologyRights


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312013-12-312012-12-31
Value4840000.05460000.04286000.01150000.01263000.0748000.01235000.0
Percentage of FiniteLivedIntangibleAssetsNet80.378.981.758.398.573.169.5
Percentage of Assets0.50.60.40.10.10.10.1
Percentage of Assets us-gaap:DevelopedTechnologyRights0.00.00.00.00.00.00.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value271414141415151614140.0
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets3.11.61.61.61.61.61.61.61.41.40.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2020-12-312019-12-312018-12-312017-12-31
Value1132000.0535000.01338000.01226000.0
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0
Percentage of Assets0.10.10.10.1

Other Assets

us-gaap:OtherAssets

us-gaap:OtherAssets


Other
Period End2020-12-312019-12-312018-12-312017-12-31
Value10101510
Percentage of OtherAssets100.0100.0100.0100.0
Percentage of Assets1.21.11.50.9

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value7.5735.372.9174.8424.7144.1358.0155.0197.0836.2066.9959.5256.9885.6256.0486.2827.6246.2087.4996.576.0396.1358.6939.6535.4685.016.922121213142634323542313147323226
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.90.60.30.50.50.40.80.50.70.60.70.90.70.50.50.60.70.50.70.60.50.50.70.80.40.40.50.90.91.01.11.92.52.32.53.02.32.23.42.32.31.9

Accrued Liabilities Current

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AccruedLiabilitiesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value252725282326243629342328222720272027232826262229222622252126223227382829373428322848
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.93.02.93.12.62.82.63.62.93.32.22.72.12.51.82.51.92.42.02.42.32.31.82.31.82.11.82.01.71.91.72.42.02.82.02.12.62.42.02.32.03.5

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
Value2625252826272927323131353331
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.12.82.93.12.92.93.12.73.23.03.13.33.12.8

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value601141141071005763169170169159162151166160184223176172119116110107103907979908717914014273077076176219080911009694
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.912.512.911.810.96.26.516.616.516.215.315.414.214.814.216.720.215.515.210.410.09.58.78.27.26.36.26.86.613.310.210.353.155.454.254.313.45.66.47.16.86.8

Long Term Debt Current

us-gaap:LongTermDebtCurrent

us-gaap:LongTermDebtCurrent


Long
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-06-302013-03-312012-12-312012-09-302012-06-30
Value555845450.00.098989696878779799410875753838323219196.456.457.2717.2714.0464.04658565765565183
Percentage of LongTermDebtCurrent100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.16.65.04.90.00.09.79.59.29.28.38.27.07.08.59.86.76.73.33.32.82.71.51.60.50.50.60.50.30.342.647.346.746.45.9

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302020-12-312019-12-31
Value2490000.01330000.01634000.0
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0
Percentage of Assets0.30.10.2

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherAccruedLiabilitiesCurrent


Other
Period End2020-12-312019-12-312018-12-312017-12-312017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value1058000.0610000.01528000.0876000.0716000.0686000.0618000.0865000.0682000.01487000.01594000.01450000.01392000.01135000.0918000.01322000.01040000.0649000.0621000.0766000.0660000.0713000.0831000.0721000.01580000.0
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.00.00.10.00.10.10.10.1

Liabilities Noncurrent

us-gaap:LiabilitiesNoncurrent

us-gaap:LiabilitiesNoncurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value403363350356352386495434473490526503535576677726794802798774784839888900946121911101244144412451115980223150148157705810795755769756
Percentage of LiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets46.039.839.539.238.241.151.342.645.646.950.447.650.151.160.065.571.670.870.567.467.871.972.171.175.196.987.594.3108.892.281.370.616.210.810.511.249.856.956.053.754.354.6

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value313390385375369356464501491470463495488520513560568583576585578587639638629633630631632664669675712755800
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets35.842.843.441.340.037.948.149.247.445.044.346.845.746.245.550.651.251.450.951.050.050.451.850.449.950.349.747.847.649.248.848.651.854.357.0

us-gaap:LongTermDebt us-gaap:DebtInstrument

gsat:ConvertibleEightPointZeroPercentSeniorNotesIssuedTwentyThirteen


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-05-20
Value1.3921.3761.3761.3611.3961.411.411.3941.3941.3791.3791.3631.3631.3481.3481.333151514131312121111151414182326252827
Percentage of LongTermDebt0.40.40.40.40.40.40.30.30.30.30.30.30.30.30.30.22.82.62.52.42.32.22.01.91.82.42.42.32.93.53.93.83.90.0
Percentage of Assets0.20.20.20.10.20.20.10.10.10.10.10.10.10.10.10.11.41.31.31.21.21.11.00.90.91.21.21.11.41.71.91.82.00.0
Percentage of Assets gsat:ConvertibleEightPointZeroPercentSeniorNotesIssuedTwentyThirteen0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

gsat:CreditFacility


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value95177180179181180180324322367365401399435432483481500497510507521575579579582582586586586586586585585
Percentage of LongTermDebt30.445.446.947.849.250.838.864.765.578.178.881.181.783.684.286.384.685.886.387.287.888.690.190.792.192.092.492.992.888.387.686.882.273.2
Percentage of Assets10.919.420.319.719.719.318.731.831.135.134.938.037.338.638.343.743.444.143.944.543.944.646.745.745.946.345.944.444.243.442.742.242.641.7
Percentage of Assets gsat:CreditFacility0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

gsat:PaycheckProtectionProgramLoanCARESAct


Long
Period End2021-03-312020-12-31
Value4.9534.947
Percentage of LongTermDebt1.31.3
Percentage of Assets0.50.6
Percentage of Assets gsat:PaycheckProtectionProgramLoanCARESAct0.00.0

gsat:PayrollProtectionProgramLoanCARESAct


Long
Period End2020-12-312020-09-30
Value4.9474.936
Percentage of LongTermDebt1.31.3
Percentage of Assets0.60.5
Percentage of Assets gsat:PayrollProtectionProgramLoanCARESAct0.00.0

gsat:SecondLienTermLoanFacility


Long
Period End2021-06-302021-03-312020-12-312019-12-312018-12-31
Value2162071981660.0
Percentage of LongTermDebt69.153.051.535.80.0
Percentage of Assets24.722.722.317.20.0
Percentage of Assets gsat:SecondLienTermLoanFacility0.00.00.00.00.0

gsat:SubordinatedLoanAgreement


Long
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value18918117316664610.0
Percentage of LongTermDebt50.549.048.835.812.812.50.0
Percentage of Assets20.819.618.517.26.35.90.0
Percentage of Assets gsat:SubordinatedLoanAgreement0.00.00.00.00.00.00.0

us-gaap:LongTermDebt us-gaap:DebtInstrument, us-gaap:FairValueByMeasurementBasis

gsat:ConvertibleEightPointZeroPercentSeniorNotesIssuedTwentyThirteen, us-gaap:CarryingReportedAmountFairValueDisclosure


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value1.3921.3761.3761.3611.3961.411.411.3941.3941.3791.3791.3631.3631.3481.3481.3331515141312
Percentage of LongTermDebt0.40.40.40.40.40.40.30.30.30.30.30.30.30.30.30.22.82.62.52.41.9
Percentage of Assets0.20.20.20.10.20.20.10.10.10.10.10.10.10.10.10.11.41.31.31.21.0
Percentage of Assets gsat:ConvertibleEightPointZeroPercentSeniorNotesIssuedTwentyThirteen us-gaap:CarryingReportedAmountFairValueDisclosure0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value313335326330324356464402392374367407400441434466459507500547540555606618609626623623624660665675127979590655732723701690664
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets35.836.736.836.335.137.948.139.537.935.835.138.537.539.238.542.141.444.844.247.646.747.549.248.848.449.849.247.347.148.948.548.69.27.06.86.446.251.451.049.848.747.9

Deferred Finance Costs Noncurrent Net

us-gaap:DeferredFinanceCostsNoncurrentNet

us-gaap:DeferredFinanceCostsNoncurrentNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value38432434455761586063666973767915171610505353545959
Percentage of DeferredFinanceCostsNoncurrentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.34.52.33.14.04.74.84.64.85.05.15.35.45.65.71.21.21.20.73.63.83.83.94.24.3

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2020-12-312019-12-31
Value755000.0395000.0
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0
Percentage of Assets0.10.0

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent


Pension
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value3507000.03585000.03650000.03755000.03985000.04145000.04128000.04619000.04580000.04541000.04489000.04450000.04458000.04452000.04389000.04709000.04944000.04917000.04883000.04911000.04894000.04856000.04810000.05537000.05440000.05478000.05499000.03146000.03336000.03448000.03529000.07117000.07216000.07226000.07221000.07152000.07375000.07409000.07407000.04240000.04654000.04727000.0
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.40.40.40.40.40.40.50.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.20.30.30.30.50.50.50.50.50.50.50.50.30.30.3

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value4.1273.3533.4483.0292.7112.7543.0712.7312.9013.2613.3663.9254.0885.5865.9736.3185.836.1915.895.47711111010111112131414131514161517161817161722
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.40.40.30.30.30.30.30.30.30.30.40.40.50.50.60.50.50.50.51.01.00.90.90.90.91.01.11.11.11.01.11.11.21.11.21.11.31.21.21.21.7

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value251313131414141513130.0
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets2.91.51.51.51.51.51.51.51.31.30.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2021-06-302020-12-31
Value4177000.02478000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0
Percentage of Assets0.50.3

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2021-06-302020-12-31
Value4055000.02510000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0
Percentage of Assets0.50.3

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2021-06-302020-12-31
Value4094000.02383000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0
Percentage of Assets0.50.3

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value2405000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.3

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value8803000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets1.0

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2021-06-302020-12-312019-12-312019-09-302019-06-302019-03-31
Value271516161414
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0
Percentage of Assets3.21.71.71.61.41.4

us-gaap:OperatingLeaseLiability us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

gsat:GatewaySites


Operating
Period End2021-06-30
Value13
Percentage of OperatingLeaseLiability48.6
Percentage of Assets1.6
Percentage of Assets gsat:GatewaySites0.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2021-06-302020-12-31
Value4021
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0
Percentage of Assets4.62.4

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2021-06-302020-12-31
Value126.12
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0
Percentage of Assets1.40.7

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value41243542344647049540741639238535839238138329119791155161254256216237263223-39.57878-14.532-204.454-74.276116266421469494484521533533551550535595445
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets47.147.747.649.050.952.742.240.837.936.934.337.135.734.125.817.88.213.714.322.222.118.619.220.817.8-3.16.2-1.1-15.4-5.58.519.230.633.835.234.536.837.537.639.238.938.60.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value-2.860.298-2.9440.3950.4861.854-3.449-3.585-4.607-4.109-3.839-4.139-4.639-7.269-6.939-6.199-5.378-6.325-6.409-5.484-4.833-4.356-3.741-2.8980.871-1.758-3.1-0.268-1.718-6.304
Percentage of StockholdersEquity-0.70.1-0.70.10.10.4-0.8-0.9-1.2-1.1-1.1-1.1-1.2-1.9-2.4-4.0-3.3-2.5-2.5-2.5-2.0-1.7-1.7-3.70.7-0.4-0.6-0.1-0.3-1.4
Percentage of Assets-0.30.0-0.30.00.10.2-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.6-0.6-0.5-0.5-0.6-0.6-0.5-0.4-0.3-0.3-0.20.1-0.1-0.2-0.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value2143214220962094209320921970194119401938193718741873187118691649159115031074864792736700480
Percentage of StockholdersEquity520.1491.7495.6469.1445.0422.6483.6466.5493.8503.0539.7478.0491.2487.4641.91019.2671.11905.3920.6174.7148.5137.5117.6107.8
Percentage of Assets244.7234.6236.1230.1226.7222.8204.0190.3187.1185.5185.3177.2175.3166.1165.5145.6129.1118.578.361.655.853.10.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value0.1790.1790.1670.1670.1670.1670.1460.1450.1450.1450.1450.1270.1260.1260.1260.110.1030.0990.0850.0490.0350.0310.0290.014
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.00.10.10.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value-1728.506-1707.057-1670.724-1648.99-1624.044-1599.308-1559.401-1521.654-1542.765-1548.954-1574.725-1478.272-1487.291-1480.279-1571.302-1482.228-1349.582-1421.904-959.038-367.922-255.724-200.8-103.333-28.41
Percentage of StockholdersEquity-419.4-391.8-394.9-369.3-345.2-323.0-382.8-365.7-392.7-401.9-438.7-377.0-390.0-385.5-539.6-916.0-569.1-1801.8-821.4-74.4-47.9-37.5-17.3-6.4
Percentage of Assets-197.4-186.9-188.1-181.1-175.8-170.3-161.5-149.2-148.8-148.2-150.6-139.7-139.2-131.4-139.1-130.9-109.5-112.1-69.9-26.2-18.0-14.50.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue us-gaap:StatementClassOfStock

us-gaap:CommonStockValue

us-gaap:CommonStock


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312012-03-312011-12-312011-09-302011-06-302010-12-31
Value179000.0179000.0167000.0167000.0167000.0167000.0146000.0145000.0145000.0145000.0145000.0127000.0126000.0126000.0126000.0105000.0103000.098000.097000.095000.095000.091000.090000.090000.089000.087000.086000.086000.076000.064000.054000.035000.030000.030000.029000.029000.029000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value2143214220962094209320921970194119401938193718741873187118691752169816631649162516241598159115901574151615031499143811351074976889864864834831816792773772736
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets244.7234.6236.1230.1226.7222.8204.0190.3187.1185.5185.3177.2175.3166.1165.5158.2153.0146.7145.6141.5140.5137.0129.1125.5124.9120.5118.5113.6108.484.178.370.364.762.261.659.458.757.355.855.054.553.1

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value-1728500000.0-1707100000.0-1670700000.0-1649000000.0-1624000000.0-1599300000.0-1559400000.0-1521700000.0-1542800000.0-1549000000.0-1574700000.0-1478300000.0-1487300000.0-1480300000.0-1571300000.0-1548700000.0-1601100000.0-1502400000.0-1482200000.0-1365000000.0-1362400000.0-1376500000.0-1349600000.0-1322800000.0-1346900000.0-1551600000.0-1421900000.0-1513900000.0-1643300000.0-1209600000.0-959040000.0-724240000.0-519270000.0-393000000.0-367920000.0-348970000.0-307780000.0-280250000.0-255720000.0-222010000.0-221330000.0-200800000.0
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-197.4-186.9-188.1-181.1-175.8-170.3-161.5-149.2-148.8-148.2-150.6-139.7-139.2-131.4-139.1-139.8-144.2-132.5-130.9-118.8-117.8-117.9-109.5-104.4-106.9-123.3-112.1-114.7-123.8-89.6-69.9-52.1-37.8-28.3-26.2-24.9-21.7-19.7-18.0-15.8-15.6-14.5

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value-2860000.0298000.0-2944000.0395000.0486000.01854000.0-3449000.0-3585000.0-4607000.0-4109000.0-3839000.0-4139000.0-4639000.0-7269000.0-6939000.0-7145000.0-6243000.0-6199000.0-5378000.0-6325000.0-6409000.0-5484000.0-4833000.0-4356000.0-3741000.0-4188000.0-2898000.00493000.0-364000.0871000.0-1855000.0-2408000.0-2327000.0-1758000.0-1432000.0-2551000.0-2641000.0-3100000.0-409000.0-275000.0-22000.0-268000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.30.0-0.30.00.10.2-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.6-0.6-0.6-0.6-0.5-0.5-0.6-0.6-0.5-0.4-0.3-0.3-0.3-0.20.00.0-0.00.1-0.1-0.2-0.2-0.1-0.1-0.2-0.2-0.2-0.0-0.00.0-0.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value514.512-1.472144.2544.605-2.9964.2340.4851.325-13.84811-2.0279.832-2.771100.9465.311.1096.703-1.6022.603-5.1528.576-3.7832.521-2.8944.522-8.7964.16-1.293-0.533-4.0049.074.391-2.5835.347-5.365-1.892-3.593-15.65-1.456
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax169.816.8-4.445.314.014.3-9.411.01.64.4-43.333.5-6.034.2-9.434.13.421.54.526.2-6.411.9-22.636.2-16.412.0-13.119.3-41.918.4-6.5-2.8-21.044.222.0-15.430.8-29.5-10.0-19.7-94.7-8.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-7024000.0-4974000.0-5241000.0-4416000.0-3301000.0-1578000.0-3866000.0-2528000.0-2836000.0-2261000.0-4220000.0-4282000.0-6513000.0-2386000.0-7207000.0-2879000.0-6602000.0-4088000.0-7130000.0-5028000.0-7550000.0-4908000.0-11932000.0-7534000.0-8204000.0-5808000.0-13212000.0-1267000.0-6504000.0-10650000.0-10782000.0-9183000.0-10223000.0-13130000.0-11347000.0-23310000.0-14886000.0-19305000.0-31874000.0-33354000.0-43489000.0-31125000.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-23.2-18.5-15.8-13.5-10.9-4.9-12.1-6.5-9.1-7.5-13.2-12.0-19.3-8.3-24.5-9.5-23.5-16.6-29.2-19.7-30.1-22.5-52.4-31.8-35.6-27.6-59.8-5.4-31.0-47.2-54.4-47.5-53.6-63.9-56.8-139.3-85.6-106.1-167.8-182.7-263.2-170.8

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-84.473390.292-3.0974.39-0.421-21.489-0.17113-0.193200.076-38.6140.061-0.151-9.128123.419-0.0158.576.528-2.925151110-3.8020.317256.59316-0.489240.04.623137.3064912353.895
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-279.0145.70.9-9.514.5-1.3-67.5-0.444.7-0.663.70.2-114.50.0207.5-0.5-32.548.814.0-0.134.229.9-12.863.448.447.9-17.21.4123.529.285.4-2.5128.70.023.0139.079.840.2259.866.3214.021.4

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-40.03238-6.3137.4075.352.451-28.3211.46611-1.1432.0947.898-47.2057.424517.474-14.69713-2.6561.682
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-132.2143.8-19.022.617.67.6-89.03.837.3-3.86.622.1-140.025.8173.524.5-52.353.7-10.96.6

Amortization Of Financing Costs

us-gaap:AmortizationOfFinancingCosts

us-gaap:AmortizationOfFinancingCosts


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value0.6751.1661.07-0.6491.9611.8616.764.6562.2822.1982.3412.4972.1941.6581.9491.9892.0822.0762.2332.262.3262.3462.6122.4432.3312.3362.4522.5482.5022.5412.5362.1752.0112.075.4090.8250.8170.8560.9390.9360.8850.9130.8190.887
Percentage of AmortizationOfFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value820000.06930000.05309000.01740000.0-1114000.02559000.01050000.0-1079000.02652000.01676000.0-694000.0834000.03383000.0269000.0107000.02053000.02780000.0-1957000.0-870000.0922000.02086000.058000.0922000.0-1120000.02343000.01309000.0-499000.0410000.01424000.0865000.0320000.02150000.0835000.01016000.0956000.02121000.0184000.0-386000.0-977000.0-965000.0711000.02209000.02241000.01471000.0
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories

us-gaap:IncreaseDecreaseInInventories


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-665000.0-453000.0-1296000.0-344000.0-362000.0-174000.0-2603000.02512000.01648000.0107000.01869000.0-2007000.0221000.0403000.0-332000.0-340000.0302000.0320000.0-1599000.0-48000.0-1700000.0-1224000.0927000.0517000.0-1768000.0-794000.0216000.0-879000.0-1437000.0-2087000.01129000.0-760000.0-1384000.0-2109000.0778000.0557000.0439000.0-756000.0-1012000.0-2276000.0-85000.0-879000.01238000.02895000.0
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value514.512-1.472144.2544.605-2.9964.2340.4851.325-13.84811-2.0279.832-2.771100.9465.311.1096.703-1.6022.603-5.1528.576-3.7832.521-2.8944.522-8.7964.16-1.293-0.533-4.0049.074.391-2.5835.347-5.365-1.892-3.593-15.65-1.456
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax169.816.8-4.445.314.014.3-9.411.01.64.4-43.333.5-6.034.2-9.434.13.421.54.526.2-6.411.9-22.636.2-16.412.0-13.119.3-41.918.4-6.5-2.8-21.044.222.0-15.430.8-29.5-10.0-19.7-94.7-8.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-21.449-36.333-21.734-24.946-24.736-38.223-37.747216.18925-96.4539.019-7.01287-22.58552-98.734-20.161-117.221-2.57714-26.947-26.81624204-129.72792129-433.73-250.541-234.797-204.969-126.272-25.078-18.952-41.188-27.533-24.525-33.709-0.681-14.068-6.466-18.083-24.493-19.249-35.642
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-70.8-134.9-65.5-76.2-81.5-118.7-118.654.719.885.7-301.925.3-20.8305.9-76.7172.1-351.1-81.8-480.5-10.156.2-123.4-117.8101.8889.4-617.1416.5552.0-1807.7-1220.0-1118.4-909.0-636.6-129.7-99.4-200.6-137.8-146.5-193.9-3.7-74.0-35.4-109.4-134.4-109.2-228.9

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-21.449-36.333-24.946-24.736-38.223216.189259.019-7.01287
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-70.8-134.9-76.2-81.5-118.754.719.885.725.3-20.8305.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1096000.01090000.01745000.01417000.01228000.01280000.01560000.01384000.01665000.01091000.02777000.01442000.01626000.01150000.01496000.01104000.01298000.01190000.01895000.01115000.01063000.0785000.0882000.0601000.0654000.0818000.01088000.01179000.0505000.0628000.0277000.01057000.0557000.0236000.0208000.0191000.0188000.0206000.087000.0354000.0903000.0651000.0835000.0853000.0
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-7024000.0-4974000.0-5241000.0-4416000.0-3301000.0-1578000.0-3866000.0-2528000.0-2836000.0-2261000.0-4220000.0-4282000.0-6513000.0-2386000.0-7207000.0-2879000.0-6602000.0-4088000.0-7130000.0-5028000.0-7550000.0-4908000.0-11932000.0-7534000.0-8204000.0-5808000.0-13212000.0-1267000.0-6504000.0-10650000.0-10782000.0-9183000.0-10223000.0-13130000.0-11347000.0-23310000.0-14886000.0-19305000.0-31874000.0-33354000.0-43489000.0-31125000.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-23.2-18.5-15.8-13.5-10.9-4.9-12.1-6.5-9.1-7.5-13.2-12.0-19.3-8.3-24.5-9.5-23.5-16.6-29.2-19.7-30.1-22.5-52.4-31.8-35.6-27.6-59.8-5.4-31.0-47.2-54.4-47.5-53.6-63.9-56.8-139.3-85.6-106.1-167.8-182.7-263.2-170.8

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-84.473390.292-3.0974.39-0.421-21.489-0.17113-0.193200.076-38.6140.061-0.151-9.128123.419-0.0158.576.528-2.925151110-3.8020.317256.59316-0.489240.04.623137.3064912353.895
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-279.0145.70.9-9.514.5-1.3-67.5-0.444.7-0.663.70.2-114.50.0207.5-0.5-32.548.814.0-0.134.229.9-12.863.448.447.9-17.21.4123.529.285.4-2.5128.70.023.0139.079.840.2259.866.3214.021.4

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value1.351.421.451.411.431.361.330.980.86
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312019-12-31
Value755000.0395000.0
Percentage of DeferredTaxLiabilities100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value381324416431675633693550344303
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gsat:AccountsReceivableCurePaymentReceived

gsat:AccountsReceivableCurePaymentReceived


Accounts
Period End2021-03-31
Value300000.0
Percentage of AccountsReceivableCurePaymentReceived100.0

gsat:ContractWithCustomerLiabilityIncreaseFromAdvancePayment

gsat:ContractWithCustomerLiabilityIncreaseFromAdvancePayment


Contract
Period End2021-06-30
Value37
Percentage of ContractWithCustomerLiabilityIncreaseFromAdvancePayment100.0

gsat:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityConversionsAndExercises

gsat:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityConversionsAndExercises


Fair
Period End2020-09-302020-06-302020-03-312019-03-31
Value001058000.00
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityConversionsAndExercises0.00.0100.00.0

gsat:NonCashInterestExpenseCashFlow

gsat:NonCashInterestExpenseCashFlow


Non
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value8.6648.2758.1539.6656.7799.257.5214.7974.634.5054.2664.4093.4662.42.5462.8092.8872.8012.8752.8332.7692.7182.7222.6693.1342.5782.7032.5696.8644.07822109.3482.735-2.896.5311.6931.191
Percentage of NonCashInterestExpenseCashFlow100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gsat:OperatingLeaseInterestExpense

gsat:OperatingLeaseInterestExpense


Operating
Period End2021-06-302020-06-302019-12-312019-09-302019-06-30
Value393000.0333000.0351000.0305000.0312000.0
Percentage of OperatingLeaseInterestExpense100.0100.0100.0100.0100.0

gsat:OperatingLeaseRightOfUseAssetAmortization

gsat:OperatingLeaseRightOfUseAssetAmortization


Operating
Period End2021-06-302020-06-302019-12-312019-09-302019-06-30
Value663000.0458000.0462000.0440000.0408000.0
Percentage of OperatingLeaseRightOfUseAssetAmortization100.0100.0100.0100.0100.0

gsat:PaymentRelatedToLineOfCreditCovenantExcessCashFlow

gsat:PaymentRelatedToLineOfCreditCovenantExcessCashFlow


Payment
Period End2021-06-302021-03-31
Value04400000.0
Percentage of PaymentRelatedToLineOfCreditCovenantExcessCashFlow0.0100.0

gsat:ProceedsFromIssuanceOfCommonStockAndStockOptionsExercised

gsat:ProceedsFromIssuanceOfCommonStockAndStockOptionsExercised


Proceeds
Period End2021-06-302021-03-31
Value334000.057000.0
Percentage of ProceedsFromIssuanceOfCommonStockAndStockOptionsExercised100.0100.0

gsat:ReductionOfDerivativeLiabilityArisingFromSettlementOfDebt

gsat:ReductionOfDerivativeLiabilityArisingFromSettlementOfDebt


Reduction
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value0.00.00.01.0580.00.00.00.00.00.00.00.0190.8681.612311104010
Percentage of ReductionOfDerivativeLiabilityArisingFromSettlementOfDebt0.00.00.0100.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0

gsat:RepaymentOfPrincipalPaymentDuePeriodOne us-gaap:DebtInstrument, us-gaap:SubsequentEventType

gsat:RepaymentOfPrincipalPaymentDuePeriodOne

gsat:CreditFacility, us-gaap:SubsequentEvent


Repayment
Period End2021-04-30
Value33
Percentage of RepaymentOfPrincipalPaymentDuePeriodOne100.0

gsat:RepaymentOfPrincipalPaymentDuePeriodTwo us-gaap:DebtInstrument, us-gaap:SubsequentEventType

gsat:RepaymentOfPrincipalPaymentDuePeriodTwo

gsat:CreditFacility, us-gaap:SubsequentEvent


Repayment
Period End2021-04-30
Value20
Percentage of RepaymentOfPrincipalPaymentDuePeriodTwo100.0

gsat:StockIssuedDuringPeriodSharesWarrantsExercised us-gaap:StatementEquityComponents

gsat:StockIssuedDuringPeriodSharesWarrantsExercised

us-gaap:CommonStock


Stock
Period End2021-03-31
Value115
Percentage of StockIssuedDuringPeriodSharesWarrantsExercised100.0

gsat:StockIssuedDuringPeriodValueWarrantsExercised

gsat:StockIssuedDuringPeriodValueWarrantsExercised


Stock
Period End2021-03-31
Value43
Percentage of StockIssuedDuringPeriodValueWarrantsExercised100.0

gsat:StockIssuedDuringPeriodValueWarrantsExercised us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-03-31
Value43
Percentage of StockIssuedDuringPeriodValueWarrantsExercised100.0

us-gaap:CommonStock


Stock
Period End2021-03-31
Value0.012
Percentage of StockIssuedDuringPeriodValueWarrantsExercised0.0

gsat:StockPriceIncrease

gsat:StockPriceIncrease


Stock
Period End2021-06-302021-03-31
Value100.0300.0
Percentage of StockPriceIncrease100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalOther

us-gaap:AdjustmentsToAdditionalPaidInCapitalOther


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value47000.047000.047000.047000.091000.047000.0197000.047000.0107000.0137000.0137000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalOther us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value47000.047000.047000.047000.091000.047000.0197000.047000.0107000.0137000.0137000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition

us-gaap:AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition


Adjustments
Period End2021-03-312020-09-302020-03-312019-09-302019-03-312018-03-31
Value79000.099000.0102000.0110000.077000.084000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-03-312020-09-302020-03-312019-09-302019-03-312018-03-31
Value79000.099000.0102000.0110000.077000.084000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:ContractWithCustomerLiabilityRevenueRecognized


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value8.3103.73.111131.48.17.7131.64.59.313
Percentage of ContractWithCustomerLiabilityRevenueRecognized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityRevenueRecognized us-gaap:ProductOrService

gsat:GatewayConstructionInNigeria


Contract
Period End2020-12-31
Value2.9
Percentage of ContractWithCustomerLiabilityRevenueRecognized78.4

us-gaap:DebtConversionConvertedInstrumentSharesIssued1 us-gaap:DebtInstrument

us-gaap:DebtConversionConvertedInstrumentSharesIssued1

gsat:ConvertibleEightPointZeroPercentSeniorNotesIssuedTwentyThirteen


Debt
Period End2020-09-302017-08-242016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-04-302015-03-312015-01-312014-12-312014-09-302014-06-302014-03-202014-03-312013-12-312013-07-19
Value0.026-72.10.00.072-60.2130.01010600.560111814140.615
Percentage of DebtConversionConvertedInstrumentSharesIssued10.0100.0100.00.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtConversionOriginalDebtAmount1

us-gaap:DebtConversionOriginalDebtAmount1


Debt
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value0.00.10.01370.00.00.00.00.00.00.00.06.2540.2370.4926.808531526140.0
Percentage of DebtConversionOriginalDebtAmount10.0100.00.0100.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:DebtInstrumentConvertibleIfConvertedValueInExcessOfPrincipal

us-gaap:DebtInstrumentConvertibleIfConvertedValueInExcessOfPrincipal


Debt
Period End2021-06-302021-03-31
Value1.51.3
Percentage of DebtInstrumentConvertibleIfConvertedValueInExcessOfPrincipal100.0100.0

us-gaap:DebtIssuanceCostsIncurredDuringNoncashOrPartialNoncashTransaction

us-gaap:DebtIssuanceCostsIncurredDuringNoncashOrPartialNoncashTransaction


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value129000.0122000.0122000.0102000.093000.0130000.0221000.0115000.0102000.063000.073000.0-29000.0577000.01277000.01245000.01334000.01281000.01229000.01176000.01126000.01068000.01031000.0930000.0836000.0819000.0761000.0
Percentage of DebtIssuanceCostsIncurredDuringNoncashOrPartialNoncashTransaction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAmortizationAndAccretionNet

us-gaap:DepreciationAmortizationAndAccretionNet


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2324242423232424232323242219191919191919191919191919192122232423222020181514141212108.2547.3015.973
Percentage of DepreciationAmortizationAndAccretionNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DilutiveSecuritiesEffectOnBasicEarningsPerShareOther us-gaap:DebtInstrument

us-gaap:DilutiveSecuritiesEffectOnBasicEarningsPerShareOther

gsat:ConvertibleEightPointZeroPercentSeniorNotesIssuedTwentyThirteen


Dilutive
Period End2020-09-302019-12-312019-09-30
Value-0.0730.421-0.132
Percentage of DilutiveSecuritiesEffectOnBasicEarningsPerShareOther100.0100.0100.0

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Effect
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value57000.0-66000.0108000.092000.07000.0-155000.030000.0-69000.057000.0-14000.0-180000.0141000.0-51000.0-22000.0-21000.0132000.087000.0-3000.0-78000.0-19000.0
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLoss

us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLoss


Fair
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-09-302013-06-30
Value1.2251.16-0.8212.793503557-64.82439-2.0591081678-77.1293.225-91.6711040-1.344-1.55554237-107.843132166-376.225-97.502-28.193
Percentage of FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPeriodIncreaseDecrease

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPeriodIncreaseDecrease


Fair
Period End2021-06-302021-03-31
Value-1.31-1.129
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPeriodIncreaseDecrease100.0100.0

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeasePrincipalPayments


Finance
Period End2021-06-302020-06-30
Value8000.038000.0
Percentage of FinanceLeasePrincipalPayments100.0100.0

us-gaap:FinanceLeaseRightOfUseAssetAmortization

us-gaap:FinanceLeaseRightOfUseAssetAmortization


Finance
Period End2021-06-302020-06-302019-12-312019-09-302019-06-30
Value1000.017000.027000.026000.026000.0
Percentage of FinanceLeaseRightOfUseAssetAmortization100.0100.0100.0100.0100.0

us-gaap:ForeignCurrencyTransactionGainLossBeforeTax

us-gaap:ForeignCurrencyTransactionGainLossBeforeTax


Foreign
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value4425000.0-4315000.06646000.0266000.01314000.0-8953000.01328000.0-2194000.0880000.086000.0
Percentage of ForeignCurrencyTransactionGainLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ForeignCurrencyTransactionGainLossUnrealized

us-gaap:ForeignCurrencyTransactionGainLossUnrealized


Foreign
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value4515000.0-4270000.06488000.0-231000.01323000.0-8942000.01405000.0-2188000.0887000.088000.0-578000.01400000.0-3289000.0-590000.0-397000.0-191000.0-1796000.0225000.0213000.0-434000.0838000.0-761000.01447000.0-1292000.0-588000.04030000.01042000.02513000.0-586000.01090000.0-378000.0-1811000.0475000.0701000.0387000.0-257000.0-992000.0-594000.0-708000.0-98000.0-1663000.0507000.0-161000.0-128000.0
Percentage of ForeignCurrencyTransactionGainLossUnrealized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnDerivativeInstrumentsNetPretax

us-gaap:GainLossOnDerivativeInstrumentsNetPretax


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-1.31-1.1291.3331.2251.16-0.8212.793503557-64.82439-2.0591081678-77.133.223-91.6681040-1.344-1.55654237-107.865132166-376.283-209.37-179.088-97.534-29.9030.5259.536-16.47320-6.52-10.251233.8616.43512-9.15-8.073
Percentage of GainLossOnDerivativeInstrumentsNetPretax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnDerivativeInstrumentsNetPretax us-gaap:DerivativeInstrumentRisk

gsat:CompoundEmbeddedConversionOptionWithEightPointZeroPercentNotesIssuedInTwentyThirteen


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value-1.077-1.7440.0350.0970.020.247-0.3930.1590.2550.215-0.140.322-0.9341.3210.5852.949-11.3541.159-7.8851.6415.3350.4492.4621137-19.0352943-93.471-47.957-37.658-25.59-0.905
Percentage of GainLossOnDerivativeInstrumentsNetPretax82.2154.52.67.91.7-30.1-14.10.30.70.40.20.845.41.23.63.714.736.08.614.913.2-33.4-158.221.216.017.622.125.824.822.921.026.23.0

gsat:CompoundEmbeddedDerivativeWithThermoLoanAgreement


Gain
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value0.00.00.00.2123.186493456-64.68438-1.1251071575-65.7752.066-83.7869.34135-1.789-4.01642199-88.808103123-257.71-102.481-92.095-36.4530.0
Percentage of GainLossOnDerivativeInstrumentsNetPretax0.00.00.0-25.8114.199.799.399.699.899.254.698.896.496.385.364.191.485.186.8133.1258.178.884.082.378.074.268.548.951.437.4-0.0

gsat:SecondLienTermLoanFacility


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value-0.2330.6151.2981.1281.14-1.280.00.0
Percentage of GainLossOnDerivativeInstrumentsNetPretax17.8-54.597.492.198.3155.90.00.0

us-gaap:ImpairmentOfLongLivedAssetsHeldForUse us-gaap:PropertyPlantAndEquipmentByType

us-gaap:ImpairmentOfLongLivedAssetsHeldForUse

us-gaap:ConstructionInProgress


Impairment
Period End2020-12-31
Value0.2
Percentage of ImpairmentOfLongLivedAssetsHeldForUse100.0

us-gaap:ImpairmentOfLongLivedAssetsToBeDisposedOf us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:ImpairmentOfLongLivedAssetsToBeDisposedOf

us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperations, gsat:GatewayLocationInNicaragua


Impairment
Period End2020-12-31
Value200000.0
Percentage of ImpairmentOfLongLivedAssetsToBeDisposedOf100.0

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value0.094.326-0.4584.105-2.246-1.598-9.2154.765-4.8459.122-8.3718.062-1.0775.365-5.1073.464-1.6112.14-2.6124.188-3.0481.574-3.8324.597-3.7043.641-3.0423.494-5.0742.897-7.2124.723-4.1284.0223.0711.2934.579-5.5120.911-1.79
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInContractWithCustomerLiability


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value482.532-1.2971.077-0.523-2.5090.556-0.9210.95-0.688-2.8681.8671.3280.651-1.4123.704
Percentage of IncreaseDecreaseInContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInDueToAffiliates

us-gaap:IncreaseDecreaseInDueToAffiliates


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value115000.0-277000.0109000.0110000.0-20000.0120000.0-91000.0-2004000.02139000.0-439000.011000.0359000.0-10000.071000.0-157000.078000.068000.0-73000.067000.03000.0-376000.0-1000.080000.080000.080000.0-105000.037000.0179000.033000.030000.0-102000.0-13000.057000.029000.0-1000.061000.0-238000.030000.0168000.030000.0-154000.0-376000.021000.0-13000.0
Percentage of IncreaseDecreaseInDueToAffiliates100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value3301000.0-531000.0376000.0-1109000.0670000.0953000.0-1075000.0-150000.01402000.0-1041000.038000.0-9000.03937000.0-172000.08000.0-101000.0578000.0214000.0-7000.0580000.0-65000.0-39000.0126000.0155000.017000.0476000.0-2230000.0829000.0570000.0629000.0963000.0-318000.0-5544000.04988000.0826000.0-6107000.0500000.0-646000.0654000.0-165000.01024000.0-28000.05138000.0-1635000.0
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-4000.0-83000.0113000.044000.0-207000.0-10000.0302000.0-159000.0464000.0-248000.0-367000.0-172000.0-751000.0-104000.0131000.0-50000.0-100000.0124000.0-1245000.032000.0705000.0-655000.02236000.0-475000.0-266000.0-163000.0-812000.0-532000.0844000.0-119000.0-83000.0-159000.0-507000.0-330000.0869000.0-553000.0-1419000.0879000.02373000.0-3404000.0985000.0-127000.0678000.0-67000.0
Percentage of IncreaseDecreaseInOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value588000.077000.02180000.0-620000.0911000.0-3452000.0-2730000.0665000.0-4311000.06797000.03600000.01958000.02381000.0-13000.01003000.0511000.0161000.0829000.0-788000.0408000.0990000.0-122000.0423000.0-1537000.0989000.0-201000.0378000.0238000.028000.0695000.0-626000.04000.01260000.089000.0604000.0-568000.015000.0-906000.0-1749000.01554000.0317000.0-476000.0-294000.0-197000.0
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestCostsIncurredCapitalized

us-gaap:InterestCostsIncurredCapitalized


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value594000.0447000.0462000.0384000.0338000.0454000.070000.0156000.0130000.078000.0119000.020000.0624000.01330000.01183000.01131000.01032000.0971000.0895000.0840000.0771000.0729000.0673000.0579000.0521000.0474000.0447000.0390000.0402000.0445000.0600000.0781000.01308000.01602000.0-1557000.01836000.01198000.01275000.0412000.05989000.0-3687000.0-1185000.0-3551000.03244000.0
Percentage of InterestCostsIncurredCapitalized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseRelatedParty dei:LegalEntity, us-gaap:DebtInstrument

us-gaap:InterestExpenseRelatedParty

gsat:ThermoCapitalPartnersLlc, gsat:SecondLienTermLoanFacility


Interest
Period End2021-06-302021-03-312020-09-302020-06-302020-03-31
Value3.73.63.43.33.2
Percentage of InterestExpenseRelatedParty100.0100.0100.0100.0100.0

us-gaap:InventoryWriteDown us-gaap:ProductOrService

us-gaap:InventoryWriteDown

us-gaap:Product


Inventory
Period End2021-06-30
Value0.782
Percentage of InventoryWriteDown100.0

us-gaap:LeaseCost

us-gaap:LeaseCost


Lease
Period End2021-06-302020-06-302019-12-312019-09-302019-06-30
Value1098000.0830000.0843000.0777000.0757000.0
Percentage of LeaseCost100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseExpense us-gaap:CounterpartyName

us-gaap:OperatingLeaseExpense

gsat:ThermoCapitalPartnersLlc


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value400000.0400000.0400000.0400000.0400000.0400000.0200000.0500000.0400000.0300000.0
Percentage of OperatingLeaseExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePayments


Operating
Period End2021-06-302020-06-30
Value2080000.01523000.0
Percentage of OperatingLeasePayments100.0100.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-3158000.03242000.0-5381000.0-91000.0-1368000.05303000.0-961000.01022000.0-498000.0-270000.0400000.0500000.02630000.0-330000.0-133000.0-902000.0-45000.0-821000.0692000.084000.0-925000.0-651000.0-1264000.0-615000.0447000.0-1290000.0-431000.0-493000.0857000.0-1235000.0
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNoncashIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value334000.096000.0-442000.0128000.0-5000.0-19000.0-254000.0-114000.0-229000.0-1000.060000.0-784000.0-235000.040000.0940000.0-20000.094000.0-754000.0-1040000.0148000.0-439000.0177000.0435000.0194000.0-314000.0-304000.0481000.0-325000.0-237000.0-864000.0-765000.0-198000.0-124000.0-283000.0-1133000.0578000.0-351000.0-333000.0-664000.0
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentOfFinancingAndStockIssuanceCosts

us-gaap:PaymentOfFinancingAndStockIssuanceCosts


Payment
Period End2021-06-302021-03-312020-06-302020-03-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0133000.0929000.0145000.0195000.0276000.0000241000.0158000.00
Percentage of PaymentOfFinancingAndStockIssuanceCosts0.0100.0100.0100.0100.0100.00.00.00.0100.0100.00.0

us-gaap:PaymentsForConstructionInProcess

us-gaap:PaymentsForConstructionInProcess


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value5.7393.0933.012.7071.4490.1511.9920.1060.4510.7931.1451.613.9360.3415.0480.3324.232.34.6983.1653.7091.5989.7115.146.3264.018100.5471.9491.3665.961101017139.7431320141325324328
Percentage of PaymentsForConstructionInProcess100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDebtIssuanceCosts us-gaap:CounterpartyName

us-gaap:PaymentsOfDebtIssuanceCosts

gsat:ThermoCapitalPartnersLlc


Payments
Period End2021-03-31
Value0.1
Percentage of PaymentsOfDebtIssuanceCosts100.0

us-gaap:PaymentsOfFinancingCosts

us-gaap:PaymentsOfFinancingCosts


Payments
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value0.00.9290.1450.1711.0350.1950.00.00.00.00.00.00.00.00.1640.005150.9920.4890.7830.00.00.250.321-0.119
Percentage of PaymentsOfFinancingCosts0.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0

us-gaap:PaymentsToAcquireIntangibleAssets

us-gaap:PaymentsToAcquireIntangibleAssets


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value559000.0669000.0629000.0391000.0682000.0360000.0605000.01308000.01187000.0455000.01072000.0547000.0753000.0648000.01122000.0630000.01260000.0784000.0669000.0521000.0445000.0361000.0680000.0497000.0686000.0657000.0
Percentage of PaymentsToAcquireIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireOtherPropertyPlantAndEquipment

us-gaap:PaymentsToAcquireOtherPropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1076000.01212000.01602000.01318000.01170000.01067000.01114000.01114000.01353000.01013000.0
Percentage of PaymentsToAcquireOtherPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOrSaleOfEquity

us-gaap:ProceedsFromIssuanceOrSaleOfEquity


Proceeds
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312012-09-30
Value0.00.3460.00.00.40.0020.4510.0760.3190.00.3590.0070.6170.0180.336-0.0152.9880.0280.30.0070.3580.0610.2440.3178.6760.316.4357.7730.1440.0
Percentage of ProceedsFromIssuanceOrSaleOfEquity0.0100.00.00.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:ProceedsFromLegalSettlements us-gaap:LitigationCase, us-gaap:SubsequentEventType

us-gaap:ProceedsFromLegalSettlements

gsat:CustomerBankruptcyClaim, us-gaap:SubsequentEvent


Proceeds
Period End2021-02-28
Value300000.0
Percentage of ProceedsFromLegalSettlements100.0

us-gaap:ProceedsFromWarrantExercises

us-gaap:ProceedsFromWarrantExercises


Proceeds
Period End2021-06-302021-03-312019-12-312014-06-30
Value0.0433.67.5
Percentage of ProceedsFromWarrantExercises0.0100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentTransfersAndChanges

us-gaap:PropertyPlantAndEquipmentTransfersAndChanges


Property
Period End2021-06-302021-03-31
Value2300000.07400000.0
Percentage of PropertyPlantAndEquipmentTransfersAndChanges100.0100.0

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:ProvisionForDoubtfulAccounts


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value276000.0420000.0160000.077000.0698000.0721000.0311000.0266000.0324000.0846000.0434000.0193000.0410000.0361000.0549000.0-101000.0390000.0418000.0396000.0464000.0448000.0-52000.0322000.01135000.01210000.0690000.0593000.0638000.0453000.0597000.0962000.0565000.0312000.0482000.0402000.0414000.0169000.0112000.0-250000.0406000.0
Percentage of ProvisionForDoubtfulAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfLinesOfCredit

us-gaap:RepaymentsOfLinesOfCredit


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302016-12-312016-09-302015-12-312015-09-30
Value844.3570.03.0970.00.2761510.0470.0380.0540.0160.03.2250.0
Percentage of RepaymentsOfLinesOfCredit100.0100.00.0100.00.0100.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0

us-gaap:ShortTermLeaseCost

us-gaap:ShortTermLeaseCost


Short
Period End2021-06-302020-06-302019-12-312019-09-302019-06-30
Value41000.021000.01000.03000.08000.0
Percentage of ShortTermLeaseCost100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities

us-gaap:CommonStock


Stock
Period End2020-09-302020-06-302020-03-31
Value0.0510.044200
Percentage of StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans

us-gaap:CommonStock


Stock
Period End2021-06-302020-06-302019-06-302018-09-302018-06-30
Value1.1871.1881.4370.20.716
Percentage of StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-06-302018-09-302018-06-302018-03-31
Value0.1731.9150.0141.3543.020.2321.3170.2751.165
Percentage of StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised


Stock
Period End2021-03-31
Value83000.0
Percentage of StockIssuedDuringPeriodSharesStockOptionsExercised100.0

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised us-gaap:StatementEquityComponents

us-gaap:CommonStock


Stock
Period End2021-03-31
Value83000.0
Percentage of StockIssuedDuringPeriodSharesStockOptionsExercised100.0

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecurities

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecurities


Stock
Period End2020-09-302020-06-302020-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-30
Value0.0150.0161200.00.00.00.0251.08648162590.0
Percentage of StockIssuedDuringPeriodValueConversionOfConvertibleSecurities100.0100.0100.00.00.00.00.0100.0100.0100.0100.0100.00.0

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecurities us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2020-09-302020-06-302020-03-31
Value0.0150.016120
Percentage of StockIssuedDuringPeriodValueConversionOfConvertibleSecurities100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecuritiesNetOfAdjustments

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecuritiesNetOfAdjustments


Stock
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value0.00.00.0840.00.0
Percentage of StockIssuedDuringPeriodValueConversionOfConvertibleSecuritiesNetOfAdjustments0.00.00.0100.00.00.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan


Stock
Period End2021-06-302020-06-302019-06-302018-09-302018-06-30
Value406000.0482000.0500000.0200000.0545000.0
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302020-06-302019-06-302018-09-302018-06-30
Value406000.0482000.0500000.0200000.0545000.0
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-06-302018-09-302018-06-302018-03-31
Value576000.01875000.0945000.0922000.01730000.0968000.0931000.01052000.01853000.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-06-302018-09-302018-06-302018-03-31
Value576000.01875000.0945000.0922000.01729000.0968000.0930000.01052000.01853000.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures100.0100.0100.0100.099.9100.099.9100.0100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised


Stock
Period End2021-03-31
Value57000.0
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-03-31
Value57000.0
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.0

us-gaap:UnrealizedGainLossOnDerivatives

us-gaap:UnrealizedGainLossOnDerivatives


Unrealized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value-1.31-1.1291.3331.2251.16-0.8212.793503557-64.82439-2.0591081678-77.133.223-91.6681040-1.344-1.55654237-107.865132166-376.282-209.37-179.088-97.595-28.9970.5259.536-16.473
Percentage of UnrealizedGainLossOnDerivatives100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WriteOffOfDeferredDebtIssuanceCost

us-gaap:WriteOffOfDeferredDebtIssuanceCost


Write
Period End2020-12-312020-09-302020-06-302020-03-312019-11-302019-06-302019-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value0.00.00.0177.30.00.00.00.00.00.00.00.02.0010.0840.1762.733177.351147.998-1.812
Percentage of WriteOffOfDeferredDebtIssuanceCost0.00.00.0100.0100.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WriteOffOfDeferredDebtIssuanceCost us-gaap:DebtInstrument

gsat:CreditFacility


Write
Period End2021-06-30
Value2.3
Percentage of WriteOffOfDeferredDebtIssuanceCost0.0

dei:EntityCommonStockSharesOutstanding us-gaap:StatementClassOfStock

dei:EntityCommonStockSharesOutstanding

us-gaap:CommonStock


Entity
Period End2021-07-302021-04-302020-07-312020-05-012020-02-212020-02-142019-11-082019-07-262019-04-262019-02-222018-10-262018-07-262018-05-032018-02-162017-10-252017-07-282017-04-282017-02-202016-10-282016-07-282016-04-282016-02-222015-10-292015-07-312015-04-302015-02-232014-10-312014-08-012014-05-022014-02-282013-11-012013-08-022013-04-302013-03-012012-10-262012-07-272012-04-272012-03-022011-10-282011-07-29
Value1793179216701668166514651451145114501448126612641263126212591025982981947946910904903894871869855780664643466407357354305301298297294293
Percentage of EntityCommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NonvotingCommonStock


Entity
Period End2020-07-312020-05-012020-02-142019-10-252019-07-262019-04-262019-02-222018-10-262018-07-262018-05-032018-02-162017-10-252017-07-282017-04-282017-02-202016-10-282016-07-282016-04-282016-02-222015-10-292015-07-312015-04-302015-02-232014-10-312014-08-012014-05-022014-02-282013-11-012013-08-022013-04-302013-03-012012-10-262012-07-272012-04-272012-03-022011-10-282011-07-29
Value0.00.00.00.00.00.00.00.00.00.00.00.013413413413413413413413413413413413420920920928325613513512710692781919
Percentage of EntityCommonStockSharesOutstanding0.00.00.00.00.00.00.00.00.00.00.00.013.113.613.714.114.214.714.814.815.015.415.415.726.831.432.560.763.037.838.141.535.431.026.36.56.6

gsat:AccruedCompensationAndBenefitsExcludingTaxesCurrent

gsat:AccruedCompensationAndBenefitsExcludingTaxesCurrent


Accrued
Period End2020-12-312019-12-312018-12-312017-12-312017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value4270000.03455000.03027000.03913000.03320000.03193000.03562000.02927000.02854000.02098000.02397000.02551000.02355000.02597000.02552000.02947000.03736000.03927000.03737000.03800000.03965000.04076000.03499000.03577000.03567000.0
Percentage of AccruedCompensationAndBenefitsExcludingTaxesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gsat:AccruedInventoryInTransitCurrent

gsat:AccruedInventoryInTransitCurrent


Accrued
Period End2020-12-312019-12-312018-12-312017-12-312017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value499000.0702000.0561000.0102000.0584000.090000.062000.0217000.044000.0502000.0906000.0178000.0953000.01189000.0
Percentage of AccruedInventoryInTransitCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gsat:AccruedTariffsCurrent

gsat:AccruedTariffsCurrent


Accrued
Period End2020-12-312019-12-312018-12-31
Value1795000.01795000.00
Percentage of AccruedTariffsCurrent100.0100.00.0

gsat:AccruedTelecommunicationsExpenseCurrent

gsat:AccruedTelecommunicationsExpenseCurrent


Accrued
Period End2020-12-312019-12-31
Value1284000.0610000.0
Percentage of AccruedTelecommunicationsExpenseCurrent100.0100.0

gsat:CARESActDeferredPayrollTaxes

gsat:CARESActDeferredPayrollTaxes


C
Period End2020-12-31
Value423000.0
Percentage of CARESActDeferredPayrollTaxes100.0

gsat:CompensatingBalanceEquityProceedsAccountAmount us-gaap:BalanceSheetLocation, us-gaap:DebtInstrument

gsat:CompensatingBalanceEquityProceedsAccountAmount

gsat:NoncurrentRestrictedCash, gsat:CreditFacility


Compensating
Period End2021-06-302021-03-312020-09-30
Value515151
Percentage of CompensatingBalanceEquityProceedsAccountAmount100.0100.0100.0

gsat:ContractWithCustomerLiabilityAccruedLiabilitiesAndCustomerDepositsCurrent

gsat:ContractWithCustomerLiabilityAccruedLiabilitiesAndCustomerDepositsCurrent


Contract
Period End2020-12-312019-12-312018-12-31
Value6551000.05751000.04802000.0
Percentage of ContractWithCustomerLiabilityAccruedLiabilitiesAndCustomerDepositsCurrent100.0100.0100.0

gsat:ContractWithCustomerLiabilityAdvancePaymentNoncurrent

gsat:ContractWithCustomerLiabilityAdvancePaymentNoncurrent


Contract
Period End2021-06-30
Value14
Percentage of ContractWithCustomerLiabilityAdvancePaymentNoncurrent100.0

gsat:CreditCardProcessorReserve

gsat:CreditCardProcessorReserve


Credit
Period End2020-12-31
Value5000000.0
Percentage of CreditCardProcessorReserve100.0

gsat:DebtInstrumentCovenantMinimumEBITDA us-gaap:DebtInstrument, us-gaap:DebtInstrumentRedemptionPeriod

gsat:DebtInstrumentCovenantMinimumEBITDA

gsat:CreditFacility, us-gaap:DebtInstrumentRedemptionPeriodFour


Debt
Period End2020-12-312019-12-31
Value2623
Percentage of DebtInstrumentCovenantMinimumEBITDA100.0100.0

gsat:CreditFacility, us-gaap:DebtInstrumentRedemptionPeriodOne


Debt
Period End2020-12-312019-12-31
Value1845
Percentage of DebtInstrumentCovenantMinimumEBITDA68.1191.6

gsat:CreditFacility, us-gaap:DebtInstrumentRedemptionPeriodThree


Debt
Period End2020-12-312019-12-31
Value2018
Percentage of DebtInstrumentCovenantMinimumEBITDA76.676.8

gsat:CreditFacility, us-gaap:DebtInstrumentRedemptionPeriodTwo


Debt
Period End2020-12-312019-12-31
Value2321
Percentage of DebtInstrumentCovenantMinimumEBITDA88.789.1

gsat:SecondLienTermLoanFacility, us-gaap:DebtInstrumentRedemptionPeriodFour


Debt
Period End2020-12-31
Value24
Percentage of DebtInstrumentCovenantMinimumEBITDA90.0

gsat:SecondLienTermLoanFacility, us-gaap:DebtInstrumentRedemptionPeriodOne


Debt
Period End2020-12-312019-12-31
Value1619
Percentage of DebtInstrumentCovenantMinimumEBITDA61.280.4

gsat:SecondLienTermLoanFacility, us-gaap:DebtInstrumentRedemptionPeriodThree


Debt
Period End2020-12-312019-12-31
Value1821
Percentage of DebtInstrumentCovenantMinimumEBITDA69.190.1

gsat:SecondLienTermLoanFacility, us-gaap:DebtInstrumentRedemptionPeriodTwo


Debt
Period End2020-12-312019-12-31
Value2116
Percentage of DebtInstrumentCovenantMinimumEBITDA79.969.0

gsat:DefinedBenefitPlanAmountsRecognizedinRetainedDeficit

gsat:DefinedBenefitPlanAmountsRecognizedinRetainedDeficit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1167000.0-397000.01133000.01169000.01059000.0
Percentage of DefinedBenefitPlanAmountsRecognizedinRetainedDeficit100.0100.0100.0100.0100.0

gsat:IntangibleAssetsAndOtherAssetsAccumulatedAmortization

gsat:IntangibleAssetsAndOtherAssetsAccumulatedAmortization


Intangible
Period End2020-12-312019-12-31
Value9998000.09009000.0
Percentage of IntangibleAssetsAndOtherAssetsAccumulatedAmortization100.0100.0

gsat:IntangibleAssetsAndOtherAssetsNoncurrent

gsat:IntangibleAssetsAndOtherAssetsNoncurrent


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value443938373736353635324038312421202018161513121210109.4368.266149.3197.6287.1037.3757.63118.0297.1227.5431423141723
Percentage of IntangibleAssetsAndOtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gsat:LesseeOperatingLeaseLeaseNotYetCommencedAssumptionAndJudgmentAmount us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

gsat:LesseeOperatingLeaseLeaseNotYetCommencedAssumptionAndJudgmentAmount

gsat:GatewaySites


Lessee
Period End2021-06-30
Value8000000.0
Percentage of LesseeOperatingLeaseLeaseNotYetCommencedAssumptionAndJudgmentAmount100.0

gsat:LesseeOperatingLeaseLiabilityToBePaidAfterYearFour

gsat:LesseeOperatingLeaseLiabilityToBePaidAfterYearFour


Lessee
Period End2021-06-30
Value21
Percentage of LesseeOperatingLeaseLiabilityToBePaidAfterYearFour100.0

gsat:LicensingandRoyaltyAgreementPaymentsReceivable

gsat:LicensingandRoyaltyAgreementPaymentsReceivable


Licensingand
Period End2020-12-312019-12-312018-12-312017-12-31
Value4679000.05037000.05209000.04920000.0
Percentage of LicensingandRoyaltyAgreementPaymentsReceivable100.0100.0100.0100.0

gsat:OperatingAndFinanceLeaseLiabilityCurrent

gsat:OperatingAndFinanceLeaseLiabilityCurrent


Operating
Period End2020-12-312019-12-312018-12-31
Value1330000.01634000.00
Percentage of OperatingAndFinanceLeaseLiabilityCurrent100.0100.00.0

us-gaap:AccrualForTaxesOtherThanIncomeTaxesCurrent

us-gaap:AccrualForTaxesOtherThanIncomeTaxesCurrent


Accrual
Period End2020-12-312019-12-312018-12-312017-12-312017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value4702000.04022000.03069000.03944000.04319000.04173000.04213000.04391000.04058000.04125000.05312000.06109000.06142000.06727000.05366000.05957000.05743000.05744000.06713000.06465000.06329000.0
Percentage of AccrualForTaxesOtherThanIncomeTaxesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedBonusesCurrentAndNoncurrent

us-gaap:AccruedBonusesCurrentAndNoncurrent


Accrued
Period End2020-12-31
Value1300000.0
Percentage of AccruedBonusesCurrentAndNoncurrent100.0

us-gaap:AccruedProfessionalFeesCurrent

us-gaap:AccruedProfessionalFeesCurrent


Accrued
Period End2020-12-312019-12-312018-12-312017-12-312017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value2705000.03034000.05224000.03386000.03532000.02544000.02860000.02401000.01705000.01601000.02237000.02584000.02370000.01925000.01826000.01684000.0513000.0705000.0966000.0867000.01337000.01006000.0969000.0995000.01826000.0
Percentage of AccruedProfessionalFeesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedSalesCommissionCurrent

us-gaap:AccruedSalesCommissionCurrent


Accrued
Period End2020-12-312019-12-312018-12-312017-12-312017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value1722000.01780000.01224000.01162000.0928000.0858000.0715000.0969000.0935000.01216000.01162000.01089000.0857000.0686000.0974000.01008000.01237000.01316000.01079000.0865000.0685000.0
Percentage of AccruedSalesCommissionCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value2483000.04525000.05622000.05558000.05942000.06163000.06950000.04484000.07969000.08047000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value-461000.01076000.01783000.0-1381000.0564000.01330000.04052000.05355000.06211000.04947000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AllowanceForDoubtfulAccountsReceivable


Allowance
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value4352000.04539000.05136000.04647000.02952000.03382000.03610000.03966000.05270000.04788000.07419000.06667000.07296000.05971000.05735000.0
Percentage of AllowanceForDoubtfulAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value3560000.03776000.04352000.04539000.05136000.04647000.02952000.03162000.03979000.03642000.03382000.03312000.03537000.03678000.03610000.03604000.04116000.04151000.03966000.04099000.04330000.04851000.05270000.05681000.04978000.04727000.04788000.04977000.04620000.04236000.07419000.06567000.06195000.06363000.06667000.07328000.06788000.06712000.07296000.08781000.07546000.05971000.0
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetRetirementObligationsNoncurrent

us-gaap:AssetRetirementObligationsNoncurrent


Asset
Period End2020-12-312019-12-312018-12-312017-12-312017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value1600000.01467000.01459000.01451000.01445000.01443000.01408000.01373000.01336000.01302000.01274000.01243000.01213000.01184000.01158000.01133000.01108000.01083000.01062000.01040000.01019000.0998000.0980000.0962000.0926000.0
Percentage of AssetRetirementObligationsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsFairValueDisclosure

us-gaap:AssetsFairValueDisclosure


Assets
Period End2021-06-302021-03-312020-12-31
Value0.6680.9010.286
Percentage of AssetsFairValueDisclosure100.0100.0100.0

us-gaap:AssetsFairValueDisclosure us-gaap:DerivativeInstrumentRisk

gsat:SecondLienTermLoanFacility


Assets
Period End2020-12-31
Value0.286
Percentage of AssetsFairValueDisclosure100.0

us-gaap:AssetsFairValueDisclosure us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel

gsat:SecondLienTermLoanFacility, us-gaap:FairValueInputsLevel3


Assets
Period End2020-12-31
Value0.286
Percentage of AssetsFairValueDisclosure100.0

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel3


Assets
Period End2021-06-302021-03-312020-12-31
Value0.6680.9010.286
Percentage of AssetsFairValueDisclosure100.0100.0100.0

us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperation us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperation

us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperations, gsat:GatewayLocationInNicaragua


Assets
Period End2020-12-312019-12-312019-01-01
Value300000.0500000.01600000.0
Percentage of AssetsOfDisposalGroupIncludingDiscontinuedOperation100.0100.0100.0

us-gaap:CapitalizedContractCostNet

us-gaap:CapitalizedContractCostNet


Capitalized
Period End2020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2400000.01919000.01976000.01974000.01916000.01970000.02018000.02070000.02082000.02089000.02265000.0
Percentage of CapitalizedContractCostNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights us-gaap:CounterpartyName, us-gaap:DebtInstrument

us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights

gsat:ThermoCompany, gsat:SecondLienTermLoanFacility


Class
Period End2020-12-312020-09-302020-06-302020-03-312019-11-30
Value115115115115124
Percentage of ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights100.0100.0100.0100.0100.0

us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights us-gaap:CounterpartyName, us-gaap:DebtInstrument, us-gaap:SubsequentEventType

gsat:ThermoCompany, gsat:CreditFacility, us-gaap:SubsequentEvent


Class
Period End2021-03-03
Value5.5
Percentage of ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights0.0

gsat:ThermoCompany, gsat:SecondLienTermLoanFacility, us-gaap:SubsequentEvent


Class
Period End2021-03-03
Value5.5
Percentage of ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights0.0

us-gaap:CompensatingBalanceAmount us-gaap:BalanceSheetLocation, us-gaap:DebtInstrument

us-gaap:CompensatingBalanceAmount

gsat:NoncurrentRestrictedCash, gsat:CreditFacility


Compensating
Period End2020-12-312019-12-312019-11-30
Value515050
Percentage of CompensatingBalanceAmount100.0100.0100.0

us-gaap:CompensatingBalanceAmount us-gaap:DebtInstrument

gsat:CreditFacility


Compensating
Period End2021-06-302021-03-312020-09-302019-12-312019-11-262017-06-302017-03-312016-09-302014-09-302014-06-302014-03-312013-12-312013-09-302013-08-312013-07-312013-06-302009-12-31
Value5050505150373738373737373737374646
Percentage of CompensatingBalanceAmount0.00.00.0101.20.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ContractWithCustomerLiabilityNoncurrent

us-gaap:ContractWithCustomerLiabilityNoncurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value535.7283.284.9955.0175.2245.2735.2615.3955.5135.6925.7585.7776.052
Percentage of ContractWithCustomerLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityNoncurrent us-gaap:ProductOrService

gsat:GatewayConstructionInNigeria


Contract
Period End2020-09-30
Value2.9
Percentage of ContractWithCustomerLiabilityNoncurrent58.1

us-gaap:DebtInstrumentCarryingAmount

us-gaap:DebtInstrumentCarryingAmount


Debt
Period End2020-12-312015-12-312014-12-312013-12-31
Value423675673745
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0

us-gaap:DebtInstrumentFaceAmount gsat:DebtInstrumentPaymentPeriod, us-gaap:DebtInstrument

us-gaap:DebtInstrumentFaceAmount

gsat:DebtInstrumentPaymentPeriodFour, gsat:CreditFacility


Debt
Period End2021-06-302020-12-31
Value97109
Percentage of DebtInstrumentFaceAmount100.0100.0

gsat:DebtInstrumentPaymentPeriodOne, gsat:CreditFacility


Debt
Period End2020-12-31
Value37
Percentage of DebtInstrumentFaceAmount34.2

gsat:DebtInstrumentPaymentPeriodThree, gsat:CreditFacility


Debt
Period End2020-12-31
Value20
Percentage of DebtInstrumentFaceAmount18.3

gsat:DebtInstrumentPaymentPeriodTwo, gsat:CreditFacility


Debt
Period End2020-12-31
Value20
Percentage of DebtInstrumentFaceAmount18.3

us-gaap:DebtInstrumentFaceAmount us-gaap:DebtInstrument

gsat:CreditFacility


Debt
Period End2021-06-302020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value97186190190190341341389389428428467467521521543543559559575575579579582582586586586586586585585
Percentage of DebtInstrumentFaceAmount100.0170.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DebtInstrumentFairValue us-gaap:DebtInstrument, us-gaap:FairValueByMeasurementBasis

us-gaap:DebtInstrumentFairValue

gsat:ConvertibleEightPointZeroPercentSeniorNotesIssuedTwentyThirteen, us-gaap:EstimateOfFairValueFairValueDisclosure


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value1.2371.1841.1221.0050.9250.7960.8750.8370.810.7780.7340.770.7511.3471.2951.2341514141312109.831
Percentage of DebtInstrumentFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentPeriodicPaymentTermsBalloonPaymentToBePaid us-gaap:DebtInstrument

us-gaap:DebtInstrumentPeriodicPaymentTermsBalloonPaymentToBePaid

gsat:CreditFacility


Debt
Period End2021-06-302021-03-31
Value97109
Percentage of DebtInstrumentPeriodicPaymentTermsBalloonPaymentToBePaid100.0100.0

us-gaap:DebtInstrumentUnamortizedDiscountNoncurrent

us-gaap:DebtInstrumentUnamortizedDiscountNoncurrent


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value323638404243643741434750535760646877
Percentage of DebtInstrumentUnamortizedDiscountNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value3236384042436437414347505357606469737782869094
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet us-gaap:DebtInstrument

gsat:CreditFacility


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value2.4375.3336.3737.3318.299.2371017192224262931343740424548515457
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet7.514.616.518.019.421.115.947.448.450.551.853.254.455.656.757.857.558.058.759.359.960.561.1

gsat:PaycheckProtectionProgramLoanCARESAct


Debt
Period End2021-03-312020-12-31
Value0.020.026
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet0.10.1

gsat:PayrollProtectionProgramLoanCARESAct


Debt
Period End2020-12-312020-09-30
Value0.0260.037
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet0.10.1

gsat:SecondLienTermLoanFacility


Debt
Period End2021-06-302021-03-312020-12-312019-12-312018-12-31
Value293132350.0
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet92.585.383.455.20.0

gsat:SubordinatedLoanAgreement


Debt
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value333434350.110.460.0
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet81.980.578.955.20.31.10.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value380324416431675633695550344303
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value507475489464712641554492361268
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value6.3492.317.152122125294.24137.519
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value133153804558
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value9.216171817
Percentage of DefinedBenefitPlanAccumulatedBenefitObligation100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value2.50.03280.04250.03630.04150.0438
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanBenefitObligation

us-gaap:DefinedBenefitPlanBenefitObligation


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value9.1791617181717
Percentage of DefinedBenefitPlanBenefitObligation100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear

us-gaap:DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear


Defined
Period End2020-12-31
Value-200000.0
Percentage of DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter


Defined
Period End2020-12-31
Value2605000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths


Defined
Period End2020-12-31
Value502000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive


Defined
Period End2020-12-31
Value526000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour


Defined
Period End2020-12-31
Value510000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree


Defined
Period End2020-12-31
Value497000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo


Defined
Period End2020-12-31
Value505000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo100.0

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear


Defined
Period End2020-12-31
Value500000.0
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear100.0

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value5.5291212141212
Percentage of DefinedBenefitPlanFairValueOfPlanAssets100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:DefinedBenefitPlanByPlanAssetCategories

gsat:DefinedBenefitPlanOther


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.9311.7891.7061.917
Percentage of DefinedBenefitPlanFairValueOfPlanAssets16.814.413.513.5

us-gaap:DefinedBenefitPlanDebtSecurity


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1.5533.7254.1584.119
Percentage of DefinedBenefitPlanFairValueOfPlanAssets28.130.132.828.9

us-gaap:DefinedBenefitPlanEquitySecuritiesNonUs


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.6191.3661.2881.615
Percentage of DefinedBenefitPlanFairValueOfPlanAssets11.211.010.211.3

us-gaap:DefinedBenefitPlanEquitySecuritiesUs


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value2.4265.5015.5096.597
Percentage of DefinedBenefitPlanFairValueOfPlanAssets43.944.443.546.3

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:FairValueByFairValueHierarchyLevel

gsat:DefinedBenefitPlanOther, us-gaap:FairValueInputsLevel2


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.9311.7891.7061.917
Percentage of DefinedBenefitPlanFairValueOfPlanAssets16.814.413.513.5

us-gaap:DefinedBenefitPlanDebtSecurity, us-gaap:FairValueInputsLevel2


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1.5533.7254.1584.119
Percentage of DefinedBenefitPlanFairValueOfPlanAssets28.130.132.828.9

us-gaap:DefinedBenefitPlanEquitySecuritiesNonUs, us-gaap:FairValueInputsLevel2


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.6191.3661.2881.615
Percentage of DefinedBenefitPlanFairValueOfPlanAssets11.211.010.211.3

us-gaap:DefinedBenefitPlanEquitySecuritiesUs, us-gaap:FairValueInputsLevel2


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value2.4265.5015.5096.597
Percentage of DefinedBenefitPlanFairValueOfPlanAssets43.944.443.546.3

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value5.52912121412
Percentage of DefinedBenefitPlanFairValueOfPlanAssets100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanFundedStatusOfPlan

us-gaap:DefinedBenefitPlanFundedStatusOfPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-3650000.0-4128000.0-4489000.0-4389000.0-4883000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations

us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value100.01.01.01.01.0
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations us-gaap:DefinedBenefitPlanByPlanAssetCategories

us-gaap:DefinedBenefitPlanDebtSecurity


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value45.00.450.460.42
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations45.045.046.042.0

us-gaap:DefinedBenefitPlanEquitySecurities


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value55.00.550.540.58
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations55.055.054.058.0

us-gaap:DerivativeAssets

us-gaap:DerivativeAssets


Derivative
Period End2021-06-302021-03-312020-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value668000.0901000.0286000.001000.01000.02000.04000.01000.06000.046000.072000.079000.0137000.0185000.0170000.0200000.084000.0
Percentage of DerivativeAssets100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssets us-gaap:DerivativeInstrumentRisk

gsat:CompoundEmbeddedDerivativeWithTheSecondLienFacilityAgreement


Derivative
Period End2021-06-302021-03-312020-12-31
Value668000.0901000.0286000.0
Percentage of DerivativeAssets100.0100.0100.0

us-gaap:DerivativeLiabilities

us-gaap:DerivativeLiabilities


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value2.9441.8670.1231.172.3953.5553.7924.58554891468212111922724435527728118920024023923829254844157577363146229511025
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilities us-gaap:DerivativeInstrumentRisk

gsat:CompoundEmbeddedConversionOptionWithEightPointZeroPercentNotesIssuedInTwentyThirteen


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-312014-12-312013-06-30
Value2.9441.8670.1230.1580.2550.2750.5220.1290.2880.5420.7570.6170.9390.0051.3261.91126267956
Percentage of DerivativeLiabilities100.0100.0100.013.510.67.713.82.80.50.60.50.80.80.00.60.89.510.917.951.4

gsat:SecondLienTermLoanFacility


Derivative
Period End2020-09-302020-06-302020-03-312019-12-312018-12-31
Value1.0122.143.282.00.0
Percentage of DerivativeLiabilities86.589.492.352.70.0

us-gaap:DerivativeLiabilitiesNoncurrent

us-gaap:DerivativeLiabilitiesNoncurrent


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value2.9441.8670.1231.172.3953.5553.7924.45654891468112011922624231827728118920024023923829254844157577353940525469242534184538285360
Percentage of DerivativeLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilityMeasurementInput us-gaap:DerivativeInstrumentRisk, us-gaap:MeasurementInputType

us-gaap:DerivativeLiabilityMeasurementInput

gsat:CompoundEmbeddedConversionOptionWithEightPointZeroPercentNotesIssuedInTwentyThirteen, us-gaap:MeasurementInputDiscountRate


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-03-312018-12-31
Value16.017.019.023.00.270.330.270.270.28
Percentage of DerivativeLiabilityMeasurementInput100.0100.0100.0100.0100.0100.0100.0100.0100.0

gsat:CompoundEmbeddedConversionOptionWithEightPointZeroPercentNotesIssuedInTwentyThirteen, us-gaap:MeasurementInputRiskFreeInterestRate


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value0.20.20.10.20.0020.0030.0160.0160.0170.0220.025
Percentage of DerivativeLiabilityMeasurementInput1.21.20.50.90.70.95.90.00.08.18.9

gsat:CompoundEmbeddedConversionOptionWithEightPointZeroPercentNotesIssuedInTwentyThirteen, us-gaap:MeasurementInputSharePrice


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1.781.350.340.310.330.290.520.410.480.430.64
Percentage of DerivativeLiabilityMeasurementInput11.17.91.81.3122.287.9192.60.00.0159.3228.6

gsat:CompoundEmbeddedDerivativeWithSecondLienTermLoanFacility, us-gaap:MeasurementInputDiscountRate


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value11.012.013.017.00.190.230.18
Percentage of DerivativeLiabilityMeasurementInput68.870.668.473.970.469.766.7

us-gaap:DueToRelatedPartiesCurrent

us-gaap:DueToRelatedPartiesCurrent


Due
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value418000.0303000.0581000.0471000.0361000.0381000.0261000.0353000.02356000.0218000.0656000.0645000.0286000.0296000.0225000.0382000.0304000.0200000.0309000.0200000.0240000.0615000.0600000.0536000.0456000.0376000.0481000.0443000.0264000.0232000.0202000.0303000.0316000.0230000.0
Percentage of DueToRelatedPartiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DueToRelatedPartiesCurrent us-gaap:CounterpartyName

gsat:ThermoCapitalPartnersLlc


Due
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-31
Value400000.0300000.0600000.0500000.0400000.0400000.0300000.0400000.0200000.0700000.0
Percentage of DueToRelatedPartiesCurrent95.799.0103.3106.2110.8105.0114.917.091.7106.7

us-gaap:EmbeddedDerivativeFairValueOfEmbeddedDerivativeAsset

us-gaap:EmbeddedDerivativeFairValueOfEmbeddedDerivativeAsset


Embedded
Period End2020-12-31
Value286000.0
Percentage of EmbeddedDerivativeFairValueOfEmbeddedDerivativeAsset100.0

us-gaap:EmbeddedDerivativeFairValueOfEmbeddedDerivativeAsset us-gaap:DerivativeInstrumentRisk

gsat:SecondLienTermLoanFacility


Embedded
Period End2021-06-302021-03-312020-12-31
Value668000.0901000.0286000.0
Percentage of EmbeddedDerivativeFairValueOfEmbeddedDerivativeAsset0.00.0100.0

us-gaap:EmbeddedDerivativeFairValueOfEmbeddedDerivativeAsset us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel

gsat:SecondLienTermLoanFacility, us-gaap:FairValueInputsLevel3


Embedded
Period End2021-06-302021-03-312020-12-31
Value668000.0901000.0286000.0
Percentage of EmbeddedDerivativeFairValueOfEmbeddedDerivativeAsset0.00.0100.0

us-gaap:EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability us-gaap:DerivativeInstrumentRisk

us-gaap:EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability

gsat:CompoundEmbeddedConversionOptionWithEightPointZeroPercentNotesIssuedInTwentyThirteen


Embedded
Period End2021-06-302021-03-312020-12-31
Value2.9441.8670.123
Percentage of EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability100.0100.0100.0

us-gaap:EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel

gsat:CompoundEmbeddedConversionOptionWithEightPointZeroPercentNotesIssuedInTwentyThirteen, us-gaap:FairValueInputsLevel3


Embedded
Period End2021-06-302021-03-312020-12-31
Value2.9441.8670.123
Percentage of EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability100.0100.0100.0

us-gaap:EmbeddedDerivativeLiabilityMeasurementInput us-gaap:Range, us-gaap:DerivativeInstrumentRisk, us-gaap:MeasurementInputType

us-gaap:EmbeddedDerivativeLiabilityMeasurementInput

srt:Maximum, gsat:CompoundEmbeddedConversionOptionWithEightPointZeroPercentNotesIssuedInTwentyThirteen, us-gaap:MeasurementInputPriceVolatility


Embedded
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312020-02-192019-12-31
Value134.0119.085.092.01.151.18130.00.013
Percentage of EmbeddedDerivativeLiabilityMeasurementInput100.0100.0100.0100.0100.0100.0100.0100.0

srt:Maximum, gsat:CompoundEmbeddedDerivativeWithThermoLoanAgreement, us-gaap:MeasurementInputPriceVolatility


Embedded
Period End2020-12-312020-03-312019-12-31
Value130.01.30.013
Percentage of EmbeddedDerivativeLiabilityMeasurementInput152.9110.2100.0

srt:Minimum, gsat:CompoundEmbeddedConversionOptionWithEightPointZeroPercentNotesIssuedInTwentyThirteen, us-gaap:MeasurementInputPriceVolatility


Embedded
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312020-02-192019-12-31
Value110.0100.040.050.00.80.870.00.7
Percentage of EmbeddedDerivativeLiabilityMeasurementInput82.184.047.154.369.667.853.85384.6

srt:Minimum, gsat:CompoundEmbeddedDerivativeWithThermoLoanAgreement, us-gaap:MeasurementInputPriceVolatility


Embedded
Period End2020-12-312020-03-312019-12-31
Value70.00.70.7
Percentage of EmbeddedDerivativeLiabilityMeasurementInput82.459.35384.6

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions

us-gaap:RestrictedStock


Employee
Period End2020-12-31
Value2100000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions

us-gaap:EmployeeStockOption


Employee
Period End2020-12-31
Value400000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions100.0

us-gaap:EquityMethodInvestments

us-gaap:EquityMethodInvestments


Equity
Period End2020-12-312019-12-312018-12-312017-12-31
Value1589000.02089000.02089000.02089000.0
Percentage of EquityMethodInvestments100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue


Fair
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value1.172.3953.5553.7924.5855489146821211192272443552772811892002402392382925484415767756334642981132829
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs


Fair
Period End2021-06-302021-03-312020-12-312019-12-312018-12-31
Value-2276000.0-966000.0163000.0-3792000.0-146860000.0
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiability


Finance
Period End2021-06-302020-12-312019-12-31
Value13000.020000.087000.0
Percentage of FinanceLeaseLiability100.0100.0100.0

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityCurrent


Finance
Period End2021-06-302020-12-312019-12-31
Value7000.011000.068000.0
Percentage of FinanceLeaseLiabilityCurrent100.0100.0100.0

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityNoncurrent


Finance
Period End2021-06-302020-12-312019-12-31
Value6000.09000.019000.0
Percentage of FinanceLeaseLiabilityNoncurrent100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDue


Finance
Period End2021-06-302020-12-31
Value14000.021000.0
Percentage of FinanceLeaseLiabilityPaymentsDue100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths


Finance
Period End2021-06-302020-12-31
Value7000.011000.0
Percentage of FinanceLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree


Finance
Period End2020-12-31
Value4000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearThree100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo


Finance
Period End2021-06-302020-12-31
Value3000.06000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearTwo100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear


Finance
Period End2021-06-30
Value4000.0
Percentage of FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear100.0

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseRightOfUseAsset


Finance
Period End2021-06-302020-12-312019-12-31
Value11000.019000.095000.0
Percentage of FinanceLeaseRightOfUseAsset100.0100.0100.0

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent


Finance
Period End2021-06-302020-12-312019-12-31
Value6.77.28.1
Percentage of FinanceLeaseWeightedAverageDiscountRatePercent100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312012-12-31
Value10107.6989.7129.4279.1399.0098.7068.4668.187.937.7217.547.3957.3147.1957.1377.0797.0216.9436.8736.8026.7326.6316.5426.1385.6696.1385.6684.914
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

gsat:RegulatoryAuthorizations


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value0.6820.4770.1520.0560.0
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization8.95.31.90.80.0

us-gaap:DevelopedTechnologyRights


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value7.0166.2325.4784.9584.744.4854.1343.6433.156
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization91.169.269.167.867.566.672.964.364.2

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive


Finite
Period End2020-12-31
Value1956000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths


Finite
Period End2020-12-31
Value1110000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive


Finite
Period End2020-12-31
Value416000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour


Finite
Period End2020-12-31
Value594000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree


Finite
Period End2020-12-31
Value840000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo


Finite
Period End2020-12-31
Value1108000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0

us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:FiniteLivedIntangibleAssetsGross


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value1315139.2868.3038.1618.0277.67.6
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:FiniteLivedIntangibleAssetsByMajorClass

gsat:RegulatoryAuthorizations


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1.8661.9371.1090.8780.0
Percentage of FiniteLivedIntangibleAssetsGross13.612.28.49.50.0

us-gaap:DevelopedTechnologyRights


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value11119.7646.1086.0035.8615.7275.35.3
Percentage of FiniteLivedIntangibleAssetsGross86.473.474.165.872.371.871.369.769.7

us-gaap:IncomeTaxReceivable

us-gaap:IncomeTaxReceivable


Income
Period End2020-12-312019-12-312018-12-312017-12-31
Value619000.0800000.0840000.01823000.0
Percentage of IncomeTaxReceivable100.0100.0100.0100.0

us-gaap:IntangibleAssetsGrossExcludingGoodwill

us-gaap:IntangibleAssetsGrossExcludingGoodwill


Intangible
Period End2020-12-312019-12-312018-12-31
Value353433
Percentage of IntangibleAssetsGrossExcludingGoodwill100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2021-06-302020-12-31
Value4261000.02597000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear


Lessee
Period End2021-06-30
Value2537000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear100.0

us-gaap:LiabilitiesFairValueDisclosure

us-gaap:LiabilitiesFairValueDisclosure


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2.9441.8670.1231.172.3953.5553.7924.5855489146
Percentage of LiabilitiesFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesFairValueDisclosure us-gaap:DerivativeInstrumentRisk

gsat:CompoundEmbeddedConversionOptionWithEightPointZeroPercentNotesIssuedInTwentyThirteen


Liabilities
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value0.1230.1580.2550.2750.5220.1290.2880.5420.757
Percentage of LiabilitiesFairValueDisclosure100.013.510.67.713.82.80.50.60.5

gsat:SecondLienTermLoanFacility


Liabilities
Period End2020-09-302020-06-302020-03-312019-12-31
Value1.0122.143.282.0
Percentage of LiabilitiesFairValueDisclosure86.589.492.352.7

us-gaap:LiabilitiesFairValueDisclosure us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel

gsat:CompoundEmbeddedConversionOptionWithEightPointZeroPercentNotesIssuedInTwentyThirteen, us-gaap:FairValueInputsLevel3


Liabilities
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value0.1230.1580.2550.2750.5220.1290.2880.5420.757
Percentage of LiabilitiesFairValueDisclosure100.013.510.67.713.82.80.50.60.5

gsat:SecondLienTermLoanFacility, us-gaap:FairValueInputsLevel3


Liabilities
Period End2020-09-302020-06-302020-03-312019-12-31
Value1.0122.143.282.0
Percentage of LiabilitiesFairValueDisclosure86.589.492.352.7

us-gaap:LiabilitiesFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel3


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2.9441.8670.1231.172.3953.5553.7924.5855489146
Percentage of LiabilitiesFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilityForUncertainTaxPositionsNoncurrent

us-gaap:LiabilityForUncertainTaxPositionsNoncurrent


Liability
Period End2020-12-312019-12-312018-12-312017-12-312017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value633000.01086000.01435000.03634000.03695000.03346000.02624000.02706000.02485000.02311000.02321000.02765000.02465000.03034000.03839000.04517000.04395000.04213000.04681000.04828000.05053000.04994000.04762000.0
Percentage of LiabilityForUncertainTaxPositionsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths


Long
Period End2020-12-31
Value58
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive


Long
Period End2020-12-31
Value230
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree


Long
Period End2020-12-31
Value1656000.0
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo


Long
Period End2020-12-31
Value132
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo100.0

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:OperatingLossCarryforwards

us-gaap:ForeignCountry


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value200242228232197142159179212202
Percentage of OperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InternalRevenueServiceIRS


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value18001800180017001600150013001100777549
Percentage of OperatingLossCarryforwards900.0743.8786.4731.2810.51051.9816.6614.2365.7270.6

us-gaap:OtherSundryLiabilitiesNoncurrent

us-gaap:OtherSundryLiabilitiesNoncurrent


Other
Period End2020-12-312019-12-31
Value8000.0123000.0
Percentage of OtherSundryLiabilitiesNoncurrent100.0100.0

us-gaap:PropertyPlantAndEquipmentOwnedAccumulatedDepreciation

us-gaap:PropertyPlantAndEquipmentOwnedAccumulatedDepreciation


Property
Period End2021-06-302021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value889869845773751727704680665644619597579559542538519502482463444426409390372354335313290267243222203183165144
Percentage of PropertyPlantAndEquipmentOwnedAccumulatedDepreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PurchaseCommitmentRemainingMinimumAmountCommitted us-gaap:CounterpartyName

us-gaap:PurchaseCommitmentRemainingMinimumAmountCommitted

gsat:MILSATLLC


Purchase
Period End2020-12-31
Value8.1
Percentage of PurchaseCommitmentRemainingMinimumAmountCommitted100.0

us-gaap:PurchaseObligation

us-gaap:PurchaseObligation


Purchase
Period End2020-12-312019-12-312018-12-31
Value6.47.015
Percentage of PurchaseObligation100.0100.0100.0

us-gaap:RestrictedCashAndCashEquivalents

us-gaap:RestrictedCashAndCashEquivalents


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312018-12-31
Value509854545160
Percentage of RestrictedCashAndCashEquivalents100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCashCurrent

us-gaap:RestrictedCashCurrent


Restricted
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value473.6253.6253.6250.00.62261606060525263630.0
Percentage of RestrictedCashCurrent100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:RestrictedCashNoncurrent

us-gaap:RestrictedCashNoncurrent


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-31
Value505151515151500.00.037
Percentage of RestrictedCashNoncurrent100.0100.0100.0100.0100.0100.0100.00.00.0100.0

us-gaap:RevenueRemainingPerformanceObligation us-gaap:ContractWithCustomerDuration

us-gaap:RevenueRemainingPerformanceObligation

us-gaap:LongTermContractWithCustomer


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value262626282729273231
Percentage of RevenueRemainingPerformanceObligation100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueRemainingPerformanceObligationPercentage us-gaap:ContractWithCustomerDuration

us-gaap:RevenueRemainingPerformanceObligationPercentage

us-gaap:LongTermContractWithCustomer


Revenue
Period End2021-06-302021-03-312020-12-312020-09-30
Value33.082.089.085.0
Percentage of RevenueRemainingPerformanceObligationPercentage100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:RestrictedStock


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value0.460.560.591.411.752.092.811.684.664.05
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value26341124261819
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2020-12-31
Value1.45
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice100.0

us-gaap:StandardProductWarrantyAccrual

us-gaap:StandardProductWarrantyAccrual


Standard
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value212000.0186000.0153000.0143000.0132000.0101000.0129000.0142000.0235000.0179000.056000.0150000.0
Percentage of StandardProductWarrantyAccrual100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UndistributedEarningsOfForeignSubsidiaries

us-gaap:UndistributedEarningsOfForeignSubsidiaries


Undistributed
Period End2020-12-31
Value3000000.0
Percentage of UndistributedEarningsOfForeignSubsidiaries100.0

us-gaap:WarrantsAndRightsOutstanding

us-gaap:WarrantsAndRightsOutstanding


Warrants
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value505050115115
Percentage of WarrantsAndRightsOutstanding100.0100.0100.0100.0100.0

us-gaap:WarrantsAndRightsOutstanding us-gaap:DebtInstrument

gsat:SecondLienTermLoanFacility


Warrants
Period End2020-12-31
Value115
Percentage of WarrantsAndRightsOutstanding230.0

us-gaap:WarrantsAndRightsOutstandingMeasurementInput us-gaap:Range, us-gaap:MeasurementInputType

us-gaap:WarrantsAndRightsOutstandingMeasurementInput

srt:Maximum, us-gaap:MeasurementInputPriceVolatility


Warrants
Period End2020-09-302020-06-302020-03-31
Value130.01.31.3
Percentage of WarrantsAndRightsOutstandingMeasurementInput100.0100.0100.0

srt:Minimum, us-gaap:MeasurementInputPriceVolatility


Warrants
Period End2020-09-302020-06-302020-03-31
Value70.00.70.7
Percentage of WarrantsAndRightsOutstandingMeasurementInput53.853.853.8

Line plots across dimensions of each concept


COGS Ratio
us-gaap:ProductOrService
(None,)
C O G S  Ratious-gaap: Product Or Service
TTM Greenblatt ROC
_
(None,)
T T M  Greenblatt  R O C_
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:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:AccountsReceivableNetCurrent
us-gaap:ProductOrService
(None,)
Accounts Receivable Net Currentus-gaap: Product Or Service
us-gaap:InventoryNet
us-gaap:PublicUtilitiesInventory
(None,)
Inventory Netus-gaap: Public Utilities Inventory
us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType
(None,)
Property Plant And Equipment Grossus-gaap: Property Plant And Equipment By Type
us-gaap:PropertyPlantAndEquipmentGross
gsat:PropertyPlantAndEquipmentAdditionalDisclosures, us-gaap:MajorPropertyClass, us-gaap:PropertyPlantAndEquipmentByType
(None, 'gsat:GlobalStarSystem', 'gsat:SpaceComponent')
Property Plant And Equipment Grossgsat: Property Plant And Equipment Additional Disclosures, us-gaap: Major Property Class, us-gaap: Property Plant And Equipment By Type
us-gaap:PropertyPlantAndEquipmentGross
gsat:PropertyPlantAndEquipmentAdditionalDisclosures, us-gaap:MajorPropertyClass, us-gaap:PropertyPlantAndEquipmentByType
('us-gaap:ConstructionInProgress', 'gsat:GlobalStarSystem', None)
Property Plant And Equipment Grossgsat: Property Plant And Equipment Additional Disclosures, us-gaap: Major Property Class, us-gaap: Property Plant And Equipment By Type
us-gaap:PropertyPlantAndEquipmentNet
us-gaap:StatementGeographical
(None,)
Property Plant And Equipment Netus-gaap: Statement Geographical
us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
(None,)
Finite Lived Intangible Assets Netus-gaap: Finite Lived Intangible Assets By Major Class
us-gaap:LongTermDebt
us-gaap:DebtInstrument
(None,)
Long Term Debtus-gaap: Debt Instrument
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components