General Discussion of Derivative Instruments and Hedging Activities [Abstract] Schedule of interest rate derivatives designated as cash flow hedges of interest rate risk Schedule of Interest Rate Derivatives [Table Text Block] Investments, Debt and Equity Securities [Abstract] Marketable Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Fair Value Disclosures [Abstract] Schedule of assets and liabilities measured at fair value on recurring basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Discontinued Operations and Disposal Groups [Abstract] Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Discontinued Operations, Held-for-sale Discontinued Operations, Held-for-sale [Member] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Cash and cash equivalents Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents Accounts receivable, net Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net Prepaid expenses and other current assets Disposal Group, Including Discontinued Operation, Prepaid and Other Assets, Current Current assets held for sale Disposal Group, Including Discontinued Operation, Assets, Current Property and equipment, net Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Noncurrent Intangible assets, net Disposal Group, Including Discontinued Operation, Intangible Assets, Noncurrent Goodwill Disposal Group, Including Discontinued Operation, Goodwill, Noncurrent Other non-current assets Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent Non-current assets held for sale Disposal Group, Including Discontinued Operation, Assets, Noncurrent Accounts payable Disposal Group, Including Discontinued Operation, Accounts Payable, Current Accrued compensation and employee-related expenses Disposal Group, Including Discontinued Operation, Liabilities, Accrued Compensation And Employee Related Expenses, Current Disposal Group, Including Discontinued Operation, Liabilities, Accrued Compensation And Employee Related Expenses, Current Accrued other Disposal Group, Including Discontinued Operation, Other Liabilities, Current Contract liabilities Disposal Group, Including Discontinued Operation, Liabilities, Contract With Customer, Current Disposal Group, Including Discontinued Operation, Liabilities, Contract With Customer, Current Liability for uncertain tax positions Disposal Group, Including Discontinued Operation, Liabilities, Liability for Uncertain Tax Positions Disposal Group, Including Discontinued Operation, Liabilities, Liability for Uncertain Tax Positions Current liabilities held for sale Disposal Group, Including Discontinued Operation, Liabilities, Current Non-current deferred income tax liability Disposal Group, Including Discontinued Operation, Deferred Tax Liabilities Non-current deferred income tax liability Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent Net assets held for sale Disposal Group, Including Discontinued Operation, Net Assets Disposal Group, Including Discontinued Operation, Net Assets Inventory Disclosure [Abstract] Components of inventories Inventory Raw Material Work in Progress and Finished Goods [Abstract] Inventory raw material work in progress and finished goods. Raw materials Inventory, Raw Materials, Net of Reserves Work in process Inventory, Work in Process, Net of Reserves Finished goods Inventory, Finished Goods, Net of Reserves Inventories Inventory, Net Inventory reserve Inventory Write-down Leases [Abstract] 2020 Lessee, Operating Lease, Liability, Payments, Due Year Two 2021 Lessee, Operating Lease, Liability, Payments, Due Year Three 2022 Lessee, Operating Lease, Liability, Payments, Due Year Four 2023 Lessee, Operating Lease, Liability, Payments, Due Year Five 2024 and thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Five Total minimum lease payments Lessee, Operating Lease, Liability, Payments, Due Less amount representing interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Present value of net minimum operating lease payments Operating Lease, Liability Less current installments of obligation under current-operating lease liabilities Operating Lease, Liability, Current Obligations under long-term operating lease liabilities, excluding current installments Operating Lease, Liability, Noncurrent Weighted-average remaining lease term - operating leases Operating Lease, Weighted Average Remaining Lease Term Weighted-average discount rate - operating leases Operating Lease, Weighted Average Discount Rate, Percent Schedule of Discontinued Operations Disposal Groups, Including Discontinued Operations [Table Text Block] Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Accrued Liabilities Accrued Liabilities [Member] Other Noncurrent Liabilities Other Noncurrent Liabilities [Member] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] 2020 Capital Leases, Future Minimum Payments Due in Two Years 2021 Capital Leases, Future Minimum Payments Due in Three Years 2022 Capital Leases, Future Minimum Payments Due in Four Years 2023 Capital Leases, Future Minimum Payments Due in Five Years 2024 and thereafter Finance Lease, Liability, Payments, Due after Year Five Total minimum lease payments Capital Leases, Future Minimum Payments Due Less amount representing interest Capital Leases, Future Minimum Payments, Interest Included in Payments Present value of net minimum payments Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments Interest rate Lessee, Capital Lease, Interest Rate Lessee, Capital Lease, Interest Rate Weighted-average remaining lease term - finance leases (years) Finance Lease, Weighted Average Remaining Lease Term Weighted-average discount rate - finance leases Finance Lease, Weighted Average Discount Rate, Percent Revenue from Contract with Customer [Abstract] Revenue from Contracts with Customers (ASC 606) Revenue from Contract with Customer [Text Block] Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating Segments Operating Segments [Member] Unallocated, net Segment Reconciling Items [Member] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Mobile Connectivity Mobile Connectivity [Member] Mobile Connectivity [Member] The mobile connectivity segment primarily manufactures and distributes a comprehensive family of mobile satellite antenna products and services that provide access to the Internet and voice services while on the move. Intertial Navigation Intertial Navigation [Member] Intertial Navigation [Member] The inertial navigation segment manufactures and distributes a portfolio of digital compass and fiber optic gyro (FOG)-based systems that address the rigorous requirements of military and commercial customers and provide reliable, easy-to-use and continuously available navigation and pointing data. Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Depreciation Depreciation Amortization expense Amortization Quarterly Financial Information Disclosure [Abstract] Quarterly Financial Results (Unaudited) Quarterly Financial Information [Text Block] Property, Plant and Equipment [Abstract] Property and Equipment Property, Plant and Equipment Disclosure [Text Block] Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Marketable securities Marketable Securities, Current Accounts receivable, net of allowance for doubtful accounts of $1,589 and $2,390 as of December 31, 2019 & December 31, 2018, respectively Accounts Receivable, after Allowance for Credit Loss, Current Inventories Prepaid expenses and other current assets Prepaid Expense and Other Assets Current contract assets Contract with Customer, Asset, Net, Current Current assets held for sale Total current assets Assets, Current Property and equipment, net Property, Plant and Equipment, Net Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Goodwill Goodwill Right of use assets Operating Lease, Right-of-Use Asset Other non-current assets Other Assets, Noncurrent Non-current contract assets Contract with Customer, Asset, Net, Noncurrent Non-current deferred income tax asset Deferred Income Tax Assets, Net Non-current assets held for sale Total assets Assets LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued compensation and employee-related expenses Employee-related Liabilities, Current Accrued other Other Accrued Liabilities, Current Accrued product warranty costs Standard and Extended Product Warranty Accrual Current portion of long-term debt Long-term Debt, Current Maturities Contract liabilities Contract with Customer, Liability, Current Current operating lease liability Liability for uncertain tax positions Liability for Uncertainty in Income Taxes, Current Current liabilities held for sale Total current liabilities Liabilities, Current Other long-term liabilities Other Liabilities, Noncurrent Long-term operating lease liability Long-term contract liabilities Contract with Customer, Liability, Noncurrent Long-term debt, excluding current portion Long-term Debt, Excluding Current Maturities Non-current deferred income tax liability Deferred Income Tax Liabilities, Net Non-current liabilities held for sale Total liabilities Liabilities Commitments and contingencies Commitments and Contingencies Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $0.01 par value. Authorized 1,000,000 shares; none issued Preferred Stock, Value, Issued Common stock, $0.01 par value. Authorized 30,000,000 shares, 19,398,699 and 19,026,393 shares issued at December 31, 2019 and December 31, 2018, respectively; and 18,001,261 and 17,743,971 shares outstanding at December 31, 2019 and December 31, 2018, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Accumulated earnings (deficit) Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Total Stockholders equity before treasury stock adjustment Stockholders Equity Before Treasury Stock Adjustment Stockholders Equity Before Treasury Stock Adjustment Less: treasury stock at cost, common stock, 1,397,438 and 1,282,422 shares as of December 31, 2019 and December 31, 2018, respectively Treasury Stock, Value Total stockholders’ equity Stockholders' Equity Attributable to Parent Total liabilities and stockholders’ equity Liabilities and Equity Share-based Payment Arrangement [Abstract] Number of Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Outstanding at December 31 (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Expired, canceled or forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Outstanding at December 31 (in shares) Exercisable at December 31 (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Options vested or expected to vest, number of option (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Outstanding at December 31 (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Expired, canceled or forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Outstanding at December 31 (in dollars per share) Exercisable at December 31 (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Options vested or expected to vest, weighted average exercise price (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Stock options, Outstanding, Weighted Average Remaining Contractual Life Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Stock options, Exercisable, Weighted Average Remaining Contractual Life Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Options vested or expected to vest, Weighted Average Remaining Contractual Life Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Stock options, Outstanding, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Stock options, Exercisable, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Options vested or expected to vest, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Debt Securities Debt Securities [Member] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] Available-for-sale Securities, Debt Maturities [Abstract] Available-for-sale Securities, Debt Maturities [Abstract] Amortized Cost Debt Securities, Available-for-sale, Amortized Cost, Fiscal Year Maturity [Abstract] Due in less than one year Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost Fair Value Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract] Due in less than one year Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value Interest income from cash equivalents and marketable securities Marketable Securities, Realized Gain (Loss) Components of inventories Schedule of Inventory, Current [Table Text Block] Income Statement [Abstract] Statement [Table] Statement [Table] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Product Product [Member] Service Service [Member] Statement [Line Items] Statement [Line Items] Sales: Revenues [Abstract] Net sales Revenue from Contract with Customer, Including Assessed Tax Costs and expenses: Cost of Goods and Services Sold [Abstract] Cost of product and service sales Cost of Goods and Services Sold Research and development Research and Development Expense Sales, marketing and support Selling and Marketing Expense General and administrative General and Administrative Expense Total costs and expenses Costs and Expenses Loss from operations Operating Income (Loss) Interest income Investment Income, Interest Interest expense Interest Expense Other income, net Other Nonoperating Income (Expense) Loss from continuing operations before income tax (benefit) expense Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Income tax (benefit) expense from continuing operations Income Tax Expense (Benefit) Net loss from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Income from discontinued operations, net of tax Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Net income (loss) Net Income (Loss) Attributable to Parent Net loss from continuing operations per common share Earnings Per Share [Abstract] Basic and diluted (in dollars per share) Income (Loss) from Continuing Operations, Per Basic and Diluted Share Net income from discontinued operations per common share Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic and Diluted Share [Abstract] Basic and diluted (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic and Diluted Share Net income (loss) per common share Net Loss Income per Common Share (Textual) [Abstract] Net loss income per common share. Basic and diluted (in dollars per share) Earnings Per Share, Basic and Diluted Number of shares used in per share calculation: Earnings Per Share, Basic, Other Disclosures [Abstract] Basic and diluted (in shares) Weighted Average Number of Shares Outstanding, Basic and Diluted Accounting Policies [Abstract] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Buildings and improvements Building and Building Improvements [Member] Machinery, satellite hubs and equipment, and video-on-demand units Machinery, Satellite Hubs and Equipment [Member] Machinery, Satellite Hubs and Equipment [Member] Office and computer equipment Office And Computer Equipment [Member] Office And Computer Equipment [Member] Motor vehicles Vehicles [Member] Statistical Measurement [Axis] Statistical Measurement [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property, plant and equipment, useful lives Property, Plant and Equipment, Estimated Useful Lives Lease Arrangement, Type [Axis] Lease Arrangement, Type [Axis] Lease Arrangement, Type [Domain] Lease Arrangement, Type [Domain] Satellite HUBS for HTS network Satellite HUBS For HTS Network [Member] Satellite HUBS For HTS Network [Member] Assets Held Under Finance Leases Assets Held Under Finance Leases [Member] Assets Held Under Finance Leases [Member] Assets held under capital leases Assets Held under Capital Leases [Member] Minimum Maximum Lease expense from continuing operation Operating Lease, Cost Short-term lease cost Short-term Lease, Cost Sublease income Sublease Income Finance lease term Lessee, Finance Lease, Term of Contract Number of satellite hubs leased Number of Satellite Hubs Leased Number of Satellite Hubs Leased Property and equipment, gross Property, Plant and Equipment, Gross Finance lease, accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Leased assets, useful life Property, Plant and Equipment, Useful Life Capital assets, depreciation expense Capital Leases, Income Statement, Amortization Expense Finance lease expense Finance Lease, Principal Payments Interest expense Finance Lease, Interest Expense Sales-type leases, term of contracts Lessor, Sales-type Lease, Term of Contract Net investment in lease, current Net Investment in Lease, Current Net investment in lease, noncurrent Net Investment in Lease, Noncurrent Sales-type lease, interest income Sales-type Lease, Interest Income Income Tax Disclosure [Abstract] (Decrease) increase in income taxes resulting from: Income Tax Reconciliation, Increase (Decrease) In Income Tax Expense (Benefit) [Abstract] Income Tax Reconciliation, Increase (Decrease) In Income Tax Expense (Benefit) [Abstract] Income tax benefit at Federal statutory income tax rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount State income tax (benefit) expense, net of federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount State research and development, investment credits Income Tax Reconciliation, Tax Credits, State Research And Investment Income Tax Reconciliation, Tax Credits, State Research And Investment Non-deductible meals & entertainment Effective Income Tax Rate Reconciliation, Nondeductible Expense, Meals and Entertainment, Amount Non-deductible stock compensation expense Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount GILTI Effective Income Tax Rate Reconciliation, Global Intangible Low-Taxed Income, Amount Effective Income Tax Rate Reconciliation, Global Intangible Low-Taxed Income, Amount Nontaxable interest income Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount Foreign tax rate differential Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Federal research and development credits Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount Uncertain tax positions Effective Income Tax Rate Reconciliation, Tax Contingency, Amount Provision to tax return adjustments Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount Change in tax rates Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount Change in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Foreign research and development incentives Effective Income Tax Rate Reconciliation, Deduction, Other, Amount Loss on legal entity dissolution Effective Income Tax Rate Reconciliation, Loss on Legal Settlement Effective Income Tax Rate Reconciliation, Loss on Legal Settlement Other Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Income tax (benefit) expense Fair Value Measurements Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block] Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Loan Category [Axis] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Loan Category [Axis] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Loan Category [Domain] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Loan Category [Domain] First Half of Mortgage First Half of Mortgage [Member] First half of mortgage. Second Half of Mortgage Second Half of Mortgage [Member] Second half of mortgage. Interest Rate Swap Interest Rate Swap [Member] Debt Covenant Period [Axis] Debt Covenant Period [Axis] Debt Covenant Period [Axis] Debt Covenant Period [Domain] Debt Covenant Period [Domain] [Domain] for Debt Covenant Period [Axis] Debt Covenant Period, One Debt Covenant Period, One [Member] Debt Covenant Period, One [Member] Debt Covenant Period, Three Debt Covenant Period, Three [Member] Debt Covenant Period, Three [Member] Debt Covenant Period, Four Debt Covenant Period, Four [Member] Debt Covenant Period, Four [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Senior Credit Facility Senior Credit Facility [Member] Senior Credit Facility [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] 2018 revolver Line of Credit [Member] Mortgage loan Mortgages [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] 2018 term notes 2018 Term Notes [Member] 2018 Term Notes Revolving loan agreement Revolving Credit Facility [Member] Term loan Term Loan [Member] Term Loan [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Term of debt instrument Debt Instrument, Term Line of credit facility, current borrowing capacity Line of Credit Facility, Current Borrowing Capacity Security interest pledge Debt Instrument, Security Interest Pledged, Percentage Debt Instrument, Security Interest Pledged, Percentage Repayment of remaining balance Long-term debt, Repayment of Principal in connection with Amendment Long-term debt, Repayment of Principal in connection with Amendment Line of credit facility, amount outstanding Long-term Line of Credit Net cash proceeds from certain dispositions to the extent not reinvested Line of Credit Facility, Mandatory Prepayment Provision, Net Cash Proceeds from Dispositions Not Reinvested, Percentage Line of Credit Facility, Mandatory Prepayment Provision, Net Cash Proceeds from Dispositions Not Reinvested, Percentage Net cash proceeds from stated equity issuances Line of Credit Facility, Mandatory Prepayment Provision, Net Cash Proceeds from Stated Equity Issuance, Percentage Line of Credit Facility, Mandatory Prepayment Provision, Net Cash Proceeds from Stated Equity Issuance, Percentage Net cash proceeds from certain receipts above certain threshold amounts Line of Credit Facility, Mandatory Prepayment Provision, Net Cash Proceeds from Receipts Greater than 250 Thousand Dollars, Non-ordinary Business, Percentage Line of Credit Facility, Mandatory Prepayment Provision, Net Cash Proceeds from Receipts Greater than 250 Thousand Dollars, Non-ordinary Business, Percentage Long-term debt Long-term Debt Remaining balance available for borrowing Line of Credit Facility, Remaining Borrowing Capacity Repayments of long-term debt Repayments of Long-term Debt Repayments of long-term lines of credit Repayments of Long-term Lines of Credit Consolidated leverage ratio Line of Credit Facility, Covenant Compliance, Maximum Consolidated Leverage Ratio Line of Credit Facility, Covenant Compliance, Maximum Consolidated Leverage Ratio Number of financial covenants Number of Financial Covenants Number of Financial Covenants Consolidated fixed charge coverage ratio Line of Credit Facility, Covenant Compliance, Maximum Consolidated Fixed Charge Coverage Ratio Line of Credit Facility, Covenant Compliance, Maximum Consolidated Fixed Charge Coverage Ratio Repayments of Debt Repayments of Debt Number of interest rate swap agreements Derivative, Number of Instruments Held Strike rate Debt Instrument, Interest Rate, Effective Percentage Schedule of Components of Income Tax Expense (Benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of Effective Income Tax Rate Reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of Loss before Income Tax, Domestic and Foreign Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Schedule of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Summary of Positions for which Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table Text Block] Summary of Positions for which Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table Text Block] Long-term debt Long-term Debt, Gross Debt issuance costs Debt Issuance Costs, Net Total debt less debt issuance costs Less amounts classified as current Debt issuance costs, current Debt Issuance Costs, Current, Net Debt issuance costs, long-term Debt Issuance Costs, Noncurrent, Net Schedule of Trading Securities and Other Trading Assets [Table] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Debt and Equity Securities, FV-NI [Line Items] Debt and Equity Securities, FV-NI [Line Items] Derivative Instruments and Hedging Activities (Textual) [Abstract] Derivative Instruments and Hedging Activities (Textual) [Abstract] Derivative instruments and hedging activities. Strike Rate Derivative term Derivative, Term of Contract Share-based Payment Arrangement, Noncash Expense [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Award Type [Domain] Award Type [Domain] Stock options Share-based Payment Arrangement, Option [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Schedule of weighted-average assumptions used to value options as of their grant date Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected life (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Derivative Instruments and Hedging Activities Derivative Instruments and Hedging Activities Disclosure [Text Block] Interim Period, Costs Not Allocable [Table] Interim Period, Costs Not Allocable [Table] Nature of Expense [Axis] Nature of Expense [Axis] Interim Period, Costs Not Allocable [Domain] Interim Period, Costs Not Allocable [Domain] Interim Period, Costs Not Allocable [Line Items] Interim Period, Costs Not Allocable [Line Items] Sales Operating expenses (a) Operating Expenses Loss from continuing operations (a) Net loss from continuing operations (a) Net loss Net loss continuing operations per share Income (Loss) from Continuing Operations, Net of 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(benefit), continuing operations Federal Income Tax Expense (Benefit), Continuing Operations Current state and local tax expense (benefit) Current State and Local Tax Expense (Benefit) Deferred state and local income tax expense (benefit) Deferred State and Local Income Tax Expense (Benefit) State and local income tax expense (benefit), continuing operations State and Local Income Tax Expense (Benefit), Continuing Operations Current foreign tax expense (benefit) Current Foreign Tax Expense (Benefit) Deferred foreign income tax expense (benefit) Deferred Foreign Income Tax Expense (Benefit) Foreign income tax expense (benefit), continuing operations Foreign Income Tax Expense (Benefit), Continuing Operations Current income tax expense (benefit) Current Income Tax Expense (Benefit) Deferred income tax expense (benefit) Deferred Income Tax Expense (Benefit) Mini-VSAT Broadband Airtime Service VSAT Airtime Service Sales [Member] VSAT Airtime Service Sales [Member] FOG-based Guidance and Navigation Systems FOG System Sales [Member] FOG System Sales [Member] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Product Sales Concentration Risk Product Concentration Risk [Member] Service Sales Concentration Risk Service Concentration Risk [Member] Service Concentration Risk [Member] Geographic Concentration Risk Geographic Concentration Risk [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Sales Revenue from Contract with Customer Benchmark [Member] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Non-US Non-US [Member] Concentration Risk, Percentage Concentration Risk, Percentage Operating income (loss) Net interest and other income (expense) Net interest and other expense Net interest (income and expense) and other expense Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income (loss) Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Provision for doubtful accounts Accounts Receivable, Credit Loss Expense (Reversal) Depreciation and amortization Depreciation, Depletion and Amortization Deferred income taxes Deferred Income Tax Expense (Benefit), Excluding Foreign Currency Translation Adjustment Deferred Income Tax Expense (Benefit), Excluding Foreign Currency Translation Adjustment Loss on disposals of fixed assets Gain (Loss) on Disposition of Assets Gain on sale of Videotel Gain (Loss) on Disposition of Business Compensation expense related to stock-based awards and employee stock purchase plan Share-based Payment Arrangement, Noncash Expense Unrealized currency translation loss (gain) Foreign Currency Transaction Gain (Loss), Unrealized Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Inventories Increase (Decrease) in Inventories Prepaid expenses, other current assets, and current contract assets Increase (Decrease) in Prepaid Expense and Other Assets Other non-current assets and non-current contract assets Increase (Decrease) in Other Operating Assets Accounts payable Increase (Decrease) in Accounts Payable Deferred revenue, contract liabilities, and long-term contract liabilities Increase (Decrease) in Contract with Customer, Liability Accrued compensation, product warranty, and other Increase (Decrease) in Accrued Liabilities Other long-term liabilities Increase (Decrease) in Other Operating Liabilities Net cash (used in) provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Capital expenditures Payments to Acquire Property, Plant, and Equipment Cash paid for acquisition of intangible assets Payments to Acquire Intangible Assets Proceeds from sale of fixed assets Proceeds from Sale of Productive Assets Proceeds from sale of Videotel, net of cash sold Proceeds from Divestiture of Businesses Purchases of marketable securities Payments to Acquire Marketable Securities Maturities and sales of marketable securities Proceeds from Sale and Maturity of Marketable Securities Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Repayments of long-term debt Repayments of term note borrowings Repayments of Long-term loan Repayments of Long-term loan Repayments of line of credit borrowings Proceeds from line of credit borrowings Proceeds from Long-term Lines of Credit Proceeds from stock options exercised and employee stock purchase plan Proceeds From Stock Options Exercised and Employee Stock Purchase Plan Proceeds from stock options exercised and employee stock purchase plan. Repurchase of common stock Payments of employee restricted stock withholdings Payments of employee restricted stock withholdings. Sale of treasury stock Proceeds from Sale of Treasury Stock Payment of finance lease Repayments of Long-term Capital Lease Obligations Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash and cash equivalents at beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash and cash equivalents at end of period Supplemental disclosure of cash flow information: Supplemental Cash Flow Information [Abstract] Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activities Cash paid for income taxes, net of refunds Income Taxes Paid, Net Changes in accrued other and accounts payable related to property and equipment additions Changes in Accrued Liabilities Related to Fixed Asset Additions Changes in accrued liabilities related to fixed asset additions. Satellite hubs acquired under finance lease Lease Obligation Incurred Cash in current assets held for sale Cash In Current Assets Held For Sale Cash In Current Assets Held For Sale Right of use assets (ROU) assets arising from entering into new operating lease obligations Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Income Taxes Income Tax Disclosure [Text Block] Schedule of interest rate derivatives designated as cash flow hedges of interest rate risk Derivative Instrument Detail [Abstract] Notional (in thousands) Derivative, Notional Amount Asset (Liability) Derivative Liability, Fair Value, Gross Asset Effective Date Derivative, Inception Date Maturity Date Derivative, Maturity Date Inventories Inventory Disclosure [Text Block] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Domain] Timing of Transfer of Good or Service [Domain] Transferred at point in time Transferred at Point in Time [Member] Transferred over time Transferred over Time [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Discontinued Operations, Disposed of by Sale Discontinued Operations, Disposed of by Sale [Member] Cash (used in) provided by operating activities—discontinued operations Cash Provided by (Used in) Operating Activities, Discontinued Operations Cash provided by (used in) investing activities—discontinued operations Cash Provided by (Used in) Investing Activities, Discontinued Operations Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] 2020 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2021 Operating Leases, Future Minimum Payments, Due in Two Years 2022 Operating Leases, Future Minimum Payments, Due in Three Years 2023 Operating Leases, Future Minimum Payments, Due in Four Years 2024 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total minimum payments Operating Leases, Future Minimum Payments Due Schedule of Operating Leased Assets [Table] Schedule of Operating Leased Assets [Table] Facility Land and Building [Member] Satellite Capacity and Equipment Satellite Capacity and Equipment [Member] Satellite Capacity and Equipment [Member] Purchase Commitment, Excluding Long-term Commitment [Axis] Purchase Commitment, Excluding Long-term Commitment [Axis] Purchase Commitment, Excluding Long-term Commitment [Domain] Purchase Commitment, Excluding Long-term Commitment [Domain] Purchase Commitment Purchase Commitment [Member] Operating Leased Assets [Line Items] Operating Leased Assets [Line Items] Operating leases, rent expense Operating Leases, Rent Expense Unconditional purchase order obligations Purchase Commitment, Remaining Minimum Amount Committed Description of Business Business Description and Accounting Policies [Text Block] Principles of Consolidation Consolidation, Policy [Policy Text Block] Significant Estimates and Assumptions and Other Significant Non-Recurring Transactions Use of Estimates, Policy [Policy Text Block] Concentration of Credit Risk and Single Source Suppliers Concentration Risk, Credit Risk, Policy [Policy Text Block] Revenue Recognition / Shipping and Handling Costs Revenue from Contract with Customer [Policy Text Block] Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Cash, Cash Equivalents and Marketable Securities Cash, Cash Equivalents and Marketable Securities [Policy Text Block] Cash, Cash Equivalents and Marketable Securities [Policy Text Block] Inventories Inventory, Policy [Policy Text Block] Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Goodwill, Intangible Assets and other Long-Lived Assets Goodwill and Intangible Assets, Policy [Policy Text Block] Other Non-Current Assets Other Non-Current Assets [Policy Text Block] Other Non-Current Assets [Policy Text Block] Product Warranty Standard Product Warranty, Policy [Policy Text Block] Research and Development Research and Development Expense, Policy [Policy Text Block] Advertising Costs Advertising Cost [Policy Text Block] Foreign Currency Translation Foreign Currency Transactions and Translations Policy [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Net Loss per Common Share Earnings Per Share, Policy [Policy Text Block] Contingent Liabilities Contingent Liability Reserve Estimate, Policy [Policy Text Block] Operating Segments Segment Reporting, Policy [Policy Text Block] Recently Issued Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Research and Development Research and Development [Abstract] Customer-funded service sales Customer Funded Sales Revenue, Services, Net Customer Funded Sales Revenue, Services, Net Customer-funded costs included in costs of service sales Customer Funded Costs Of Goods Sold Customer Funded Costs Of Goods Sold Product Liability Contingency [Table] Product Liability Contingency [Table] Product Liability Contingency [Line Items] Product Liability Contingency [Line Items] Limited product warranty period Limited Product Warranty Period Limited product warranty period. Summary of product warranty activity Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward] Beginning balance Standard Product Warranty Accrual Charges to expense Product Warranty Expense Costs incurred Standard Product Warranty Accrual, Period Increase (Decrease) Ending balance Discontinued Operations Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Statement of Comprehensive Income [Abstract] Net income (loss) Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Unrealized gain on available-for-sale securities Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Unrealized gain on derivative instruments, net Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Other comprehensive (loss) income, net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Total comprehensive income (loss) Other Comprehensive Income (Loss), Tax Schedule of reporting segments Schedule of Segment Reporting Information, by Segment [Table Text Block] Disclosure of Repurchase Agreements [Abstract] Common stock available for repurchase (in shares) Stock Repurchase Program, Number of Shares Authorized to be Repurchased Share repurchase program, term Share Repurchase Program, Term Share Repurchase Program, Term Stock repurchase program, authorized amount Stock Repurchase Program, Authorized Amount Stock repurchased during period (in shares) Stock Repurchased During Period, Shares Stock repurchased during period, value Stock Repurchased During Period, Value Number of other repurchase programs outstanding Stock Repurchase Program Other Outstanding Number Stock repurchase program other outstanding number. Debt and Line of Credit Debt Disclosure [Text Block] Components of Deferred Tax Assets and Liabilities [Abstract] Components of Deferred Tax Assets and Liabilities [Abstract] Deferred tax assets: Components of Deferred Tax Assets [Abstract] Accounts receivable, due to allowance for doubtful accounts Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts Inventories Deferred Tax Assets, Inventory Operating loss carry-forwards Deferred Tax Assets, Operating Loss Carryforwards Stock-based compensation expense Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Property and equipment, due to difference in depreciation Deferred Tax Assets, Goodwill and Intangible Assets Research and development, alternative minimum tax credit carry-forwards Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax Foreign tax credit carry-forwards Deferred Tax Assets, Tax Credit Carryforwards, Foreign State tax credit carry-forwards Deferred Tax Assets, Tax Credit Carryforwards, State Deferred Tax Assets, Tax Credit Carryforwards, State Capitalized research and development Deferred Tax Assets, in Process Research and Development Warranty reserve Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Warranty Reserves Accrued expenses Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Deferred Tax Asset, Right-of-Use Assets Deferred Tax Asset, Right-of-Use Assets Deferred Tax Asset, Right-of-Use Assets Gross deferred tax assets Deferred Tax Assets, Gross Less valuation allowance Deferred Tax Assets, Valuation Allowance Total deferred tax assets Deferred Tax Assets, Net of Valuation Allowance Deferred tax liabilities: Components of Deferred Tax Liabilities [Abstract] Purchased intangible assets Deferred Tax Liabilities, Intangible Assets Property and equipment, due to differences in depreciation Deferred Tax Liabilities, Property, Plant and Equipment Deferred Lease Liability, Lease Liability Deferred Lease Liability, Lease Liability Deferred Lease Liability, Lease Liability Other Deferred Tax Liabilities, Other Total deferred tax liabilities Deferred Tax Liabilities, Gross Net deferred tax liability Deferred Tax Liabilities, Net Non-current deferred income tax asset Non-current deferred income tax liability Retirement Benefits [Abstract] Employer matching contribution Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Vesting period Defined Contribution Plan, Vesting Period Defined Contribution Plan, Vesting Period Employer matching contribution, amount Defined Contribution Plan, Employer Matching Contribution, Amount Defined Contribution Plan, Employer Matching Contribution, Amount Discretionary contributions Defined Contribution Plan, Employer Discretionary Contribution Amount Document and Entity Information [Abstract] Document and entity information. Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Current Reporting Status Entity Current Reporting Status Entity Voluntary Filers Entity Voluntary Filers Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Public Float Entity Public Float Entity Emerging Growth Company Entity Emerging Growth Company Entity Small Business Entity Small Business Entity Shell Company Entity Shell Company Segment Reporting Segment Reporting Disclosure [Text Block] Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-sale [Table] Money market mutual funds Money Market Funds [Member] Amortized Cost Debt Securities, Available-for-sale, Amortized Cost Gross Unrealized Gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized Losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Fair Value Debt Securities, Available-for-sale Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Unrecognized tax benefits as of January 1 Unrecognized Tax Benefits Gross increase in unrecognized tax benefits - prior year tax positions Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Gross increase in unrecognized tax benefits - current year tax positions Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Lapse of statute of limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Unrecognized tax benefits as of December 31 Goodwill and Intangible Assets Disclosure [Abstract] Schedule of finite-lived intangible assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of finite-lived intangible assets, future amortization expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Schedule of goodwill Schedule of Goodwill [Table Text Block] Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest [Abstract] United States Income (Loss) from Continuing Operations before Income Taxes, Domestic Foreign Income (Loss) from Continuing Operations before Income Taxes, Foreign Schedule of Error Corrections and Prior Period Adjustment Restatement [Table] Schedule of Error Corrections and Prior Period Adjustment Restatement [Table] Adjustments for Error Corrections [Axis] Adjustments for Error Corrections [Axis] Adjustments for Error Correction [Domain] Adjustments for Error Correction [Domain] Implementation of ASC 606 Implementation Of Topic 606 [Member] Implementation Of Topic 606 [Member] Restatement [Axis] Restatement [Axis] Restatement [Domain] Restatement [Domain] Adjustment Restatement Adjustment [Member] Error Corrections and Prior Period Adjustments Restatement [Line Items] Error Corrections and Prior Period Adjustments Restatement [Line Items] Product sales Revenue from Contract with Customer, Excluding Assessed Tax Cost of product sales Current contract assets Non-current contract assets Current contract liabilities Long-term contract liabilities Non-current deferred income tax asset Revenue recognized Contract with Customer, Liability, Revenue Recognized Schedule of future minimum rental payments for operating leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Leases Lessee, Finance Leases [Text Block] Leases Lessee, Operating Leases [Text Block] Leases Lessor, Sales-type Leases [Text Block] Schedule of weighted-average assumptions used to value options as of their grant date Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of share-based compensation, stock options, activity Share-based Payment Arrangement, Option, Activity [Table Text Block] Schedule of share-based compensation, restricted stock and restricted stock units activity Nonvested Restricted Stock Shares Activity [Table Text Block] Schedule of share-based compensation, activity Share-based Payment Arrangement, Activity [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2023 Finite-Lived Intangible Assets, Amortization Expense, Year Five Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five Net Carrying Value Finite-Lived Intangible Assets, Net Stock-Based Compensation Expense Location [Abstract] Stock-Based Compensation Expense Location [Abstract] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Cost of product sales Cost of Goods and Service Benchmark [Member] Cost of service sales Cost of service sales [Member] Cost of service sales [Member] Research and development Research and Development Expense [Member] Sales, marketing and support Selling and Marketing Expense [Member] General and administrative General and Administrative Expense [Member] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Stock-based compensation expense Share-based Payment Arrangement, Expense Goodwill and Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Accounting Policies [Table] Accounting Policies [Table] Accounting Policies [Table] Revenue-generating assets Hardware Revenue Generating Asset [Member] Hardware Revenue Generating Asset [Member] Accounting Policies [Line Items] Accounting Policies [Line Items] [Line Items] for Accounting Policies [Table] Share purchase agreement Share Purchase Agreement Share Purchase Agreement Interest rate Debt Instrument, Interest Rate, Stated Percentage Sale of treasury stock (in shares) Stock Issued During Period, Shares, Treasury Stock Reissued Purchase price (in USD per share) Sale of Stock, Price Per Share Capital lease term Capital Lease Term Capital Lease Term Satellite hubs leased Number of operating segments Number of Operating Segments Concentration of Credit Risk and Single Source Suppliers Risks and Uncertainties [Abstract] Advertising Costs Marketing and Advertising Expense [Abstract] Advertising expense Advertising Expense Foreign Currency Translation Foreign Currency Transaction Gain (Loss), before Tax [Abstract] Foreign currency transaction losses (gain), before tax Foreign Currency Transaction Gain (Loss), before Tax Lease liabilities Share Buyback Program Treasury Stock [Text Block] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] ESPP Plan ESPP Plan [Member] ESPP Plan [Member] Stock-based compensation awards excluding ESPP Stock-based compensation awards excluding ESPP [Member] Stock-based compensation awards excluding ESPP [Member] Restricted stock Restricted Stock [Member] Employee stock purchase plan Employee Stock [Member] Stock-Based Compensation (Textual) [Abstract] Stock Based Compensation (Textual) [Abstract] Stock based compensation. Number of shares authorized (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Number of additional shares authorized (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized Stock award, vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Stock award, exercise period Share-Based Compensation Arrangement By Share Based Payment Award, Award Exercise Period Share-Based Compensation Arrangement By Share Based Payment Award, Award Exercise Period Awards other than options, decrease in number of shares reserved for issuance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Reduction Of Number of Shares Reserved For Issuance Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Reduction Of Number of Shares Reserved For Issuance Common stock, shares reserved for issuance (in shares) Common Stock, Capital Shares Reserved for Future Issuance Number of shares available for future grants (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Weighted-average fair value per share, options granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Stock options, total intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Unrecognized compensation expense Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Weighted-average period of recognition (in years) Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Cash received under stock option plans for exercises Proceeds from Stock Options Exercised Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Weighted-average grant-date fair value (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Employee election percentage of pre-tax compensation withheld to purchase Company's common stock shares Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Awards, Pre-Tax Contibution Percentage Of Compensation Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Awards, Pre-Tax Contibution Percentage Of Compensation Percentage of Company's common stock share price Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instrument, Percentage Of Share Price Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instrument, Percentage Of Share Price Shares issued (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period Employee stock purchase plan, discount percentage attributable to compensation expense Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instrument, Discount Percentage Attributable to Compensation Expense Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instrument, Discount Percentage Attributable to Compensation Expense Cash received under the employee stock purchase plan Proceeds, Issuance of Shares, Share-based Payment Arrangement, Excluding Option Exercised Goodwill [Roll Forward] Goodwill [Roll Forward] Balance at January 1 Foreign currency translation adjustment Goodwill, Foreign Currency Translation Gain (Loss) Balance at December 31 401(k) Plan Compensation and Employee Benefit Plans [Text Block] Future minimum lease payments under operating leases Lessee, Operating Lease, Liability, Maturity [Table Text Block] Schedule of future minimum capital lease payments Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block] Sales-type lease, future undiscounted cash flows Sales-type Lease, Lease Income [Table Text Block] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Scenario [Axis] Scenario [Axis] Scenario [Domain] Scenario [Domain] Forecast Forecast [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Acquisition Prior to 2013 Acquisition Prior to 2013 [Member] Acquisition Prior to 2013 [Member] Headland Media Limited Headland Media Limited [Member] Headland Media Limited [Member] Q1 2017 Acquisition Q1 2017 Acquisition [Member] Q1 2017 Acquisition [Member] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Subscriber relationships Customer Relationships [Member] Distribution rights Distribution Rights [Member] Total weighted Average remaining useful life Finite-Lived Intangible Assets [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Useful life Finite-Lived Intangible Asset, Useful Life Assets acquired Finite-lived Intangible Assets Acquired Assets consideration Contingent Consideration from Acquisition, Annual Payment Contingent Consideration from Acquisition, Annual Payment. Contingent consideration arising from an asset purchase agreement, resulting in an annual payment from the Company to the third party. Amortization expense Amortization of Intangible Assets Weighted average remaining useful life in years Finite-Lived Intangible Assets, Remaining Amortization Period Property, plant and equipment Property, Plant and Equipment [Table Text Block] Legal Matters Allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss Intangible assets, accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred Stock, Shares Authorized Preferred Stock, Shares Authorized Preferred Stock, Shares Issued Preferred Stock, Shares Issued Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common Stock, Par Value (in shares) Common Stock, Shares Authorized Common Stock, Shares Issued Common Stock, Shares, Issued Common Stock, Shares Outstanding Common Stock, Shares, Outstanding Treasury Stock, Shares Outstanding Treasury Stock, Shares Consolidated Statements Of Stockholders' Equity and Accumulated Other Comprehensive [Abstract] Consolidated Statements Of Stockholders' Equity and Accumulated Other Comprehensive [Abstract] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] (Accumulated Deficit) Retained Earnings Retained Earnings [Member] Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Treasury Stock Treasury Stock [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning Balance Beginning Balance, shares Beginning Balance, treasury stock, shares Other comprehensive (loss) income ASC 606 Adoption Cumulative Effect of New Accounting Principle in Period of Adoption Stock-based compensation APIC, Share-based Payment Arrangement, Increase for Cost Recognition Issuance of common stock under employee stock purchase plan Stock Issued During Period, Value, Employee Stock Purchase Plan Issuance of common stock under employee stock purchase plan, shares Stock Issued During Period, Shares, Employee Stock Purchase Plans Acquisition of treasury stock Treasury Stock, Retired, Par Value Method, Amount Acquisition of treasury stock, shares Treasury Stock, Shares, Acquired Sales of treasury stock Stock Issued During Period, Value, Treasury Stock Reissued Sale of treasury stock, shares Exercise of stock options and issuance of restricted stock awards, net of forfeitures Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Exercise of stock options and issuance of restricted stock awards, net of forfeitures, shares Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Ending Balance, treasury stock, shares Ending Balance, shares Ending Balance Tax Credit Carryforward [Table] Tax Credit Carryforward [Table] Tax Credit Carryforward [Axis] Tax Credit Carryforward [Axis] Tax Credit Carryforward, Name [Domain] Tax Credit Carryforward, Name [Domain] Research Tax Credit Carryforward Research Tax Credit Carryforward [Member] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Internal Revenue Service (IRS) Internal Revenue Service (IRS) [Member] State and Local Jurisdiction State and Local Jurisdiction [Member] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Domain] Initial Application Period Cumulative Effect Transition [Domain] Difference between Revenue Guidance in Effect before and after Topic 606 Difference between Revenue Guidance in Effect before and after Topic 606 [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2016-09 Accounting Standards Update 2016-09 [Member] Accounting Standards Update 2014-09 Accounting Standards Update 2014-09 [Member] Valuation Allowance by Deferred Tax Asset [Axis] Valuation Allowance by Deferred Tax Asset [Axis] Deferred Tax Asset [Domain] Deferred Tax Asset [Domain] Deferred Tax Assets, Tax Credit Carryforwards And Operating Loss Carryforwards Deferred Tax Assets, Tax Credit Carryforwards And Operating Loss Carryforwards [Member] Deferred Tax Assets, Tax Credit Carryforwards And Operating Loss Carryforwards [Member] Tax Credit Carryforward [Line Items] Tax Credit Carryforward [Line Items] Unrecognized excess tax benefit Tax Credit Carryforward, Amount General business credit Deferred Tax Assets, Tax Credit Carryforwards, General Business Cumulative effect adjustment Valuation allowance, deferred tax asset Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Interest and penalities Income Tax Examination, Penalties and Interest Expense Non-current income taxes payable Income Tax Examination, Penalties and Interest Accrued Reasonably possible decrease in unrecognized tax benefit Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit Reduction to deferred tax assets and corresponding valuation allowance related to 2017 Tax Act Tax Cuts and Jobs Act, Incomplete Accounting, Change in Tax Rate, Deferred Tax Asset, Provisional Income Tax Expense Net tax benefit related to estimate of the provisions of the 2017 Tax Act Tax Cuts and Jobs Act, Incomplete Accounting, Provisional Income Tax Expense (Benefit) Reduction to deferred tax assets and corresponding valuation allowance related to 2017 Tax Act Tax Cuts and Jobs Act, Change in Tax Rate, Deferred Tax Asset, Income Tax Expense Net tax benefit related to 2017 Tax Act Tax Cuts and Jobs Act, Income Tax Expense (Benefit) Transitional toll tax related to 2017 Tax Act Tax Cuts And Jobs Act Of 2017, Change In Tax Rate, Deferred Tax Asset, Income Tax Expense, Transitional Toll Tax Tax Cuts And Jobs Act Of 2017, Change In Tax Rate, Deferred Tax Asset, Income Tax Expense, Transitional Toll Tax General administrative expense Internally developed software Software Development [Member] Proprietary content Trade Secrets [Member] Intellectual property Intellectual Property [Member] Gross Carrying Amount Finite-Lived Intangible Assets, Gross Accumulated Amortization Land Land [Member] Building and improvements Leasehold improvements Leaseholds and Leasehold Improvements [Member] Machinery and equipment Machinery and Equipment [Member] Office and computer equipment Motor vehicles Less accumulated depreciation Property and equipment, net Schedule of quarterly financial information Quarterly Financial Information [Table Text Block] Schedule of allowance for doubtful accounts Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Summary of product warranty activity Schedule of Product Warranty Liability [Table Text Block] Revenue and related development costs, customer-funded research and development costs Revenue And Related Development Costs, Customer-Funded Research And Development Costs [Table Text Block] Revenue And Related Development Costs, Customer-Funded Research And Development Costs [Table Text Block] Schedule of reconciliation of basic and diluted weighted average common shares outstanding Schedule of Weighted Average Number of Shares [Table Text Block] Intangible Assets [Roll Forward] Finite-lived Intangible Assets [Roll Forward] Balance at December 31, 2018 Intangible Assets, Gross (Excluding Goodwill) Amortization expense Intangibles assets acquired in asset acquisition Foreign currency translation adjustment Finite Lived Intangible Assets, Foreign Currency Translation Gain (Loss) Balance at December 31, 2019 Net Sales from Contracts with Customers Disaggregation of Revenue [Table Text Block] Sales: Service sales Disposal Group, Including Discontinued Operation, Revenue Costs and Expenses [Abstract] Costs and Expenses [Abstract] Costs of service sales Disposal Group, Including Discontinued Operation, Costs of Goods Sold Sales, marketing and support Disposal Group, Including Discontinued Operation, Sales, Marketing and Support Disposal Group, Including Discontinued Operation, Sales, Marketing and Support General and administrative Disposal Group, Including Discontinued Operation, General and Administrative Expense Other expense, net Disposal Group, Including Discontinued Operation, Other Expense Income from discontinued operations before tax expense Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, before Income Tax Gain on sale of discontinued operations before tax expense Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax Total income from discontinued operations before tax expense Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax Income tax expense on discontinued operations Discontinued Operation, Tax Effect of Discontinued Operation Income from discontinued operations, net of taxes Net income from discontinued operations per common share Weighted average number of common shares outstanding: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Anti-dilutive common stock equivalents related to options and restricted stock awards excluded from fully diluted calculation (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Weighted average common shares outstanding—basic (in shares) Weighted Average Number of Shares Outstanding, Basic Dilutive common shares issuable in connection with stock plans (in shares) Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares Weighted average common shares outstanding—diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Intangible Asset Useful Lives [Abstract] Intangible Asset Useful Lives [Abstract] Weighted Average Remaining Useful Life in Years Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value, Recurring and Nonrecurring [Table] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Level 3 Fair Value, Inputs, Level 3 [Member] Asset Class [Axis] Asset Class [Axis] Fair Value by Asset Class [Domain] Asset Class [Domain] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Assets Assets, Fair Value Disclosure Liabilities Interest Rate Derivative Liabilities, at Fair Value Type of Allowance [Axis] Type of Allowance [Axis] Type of Allowance [Axis] - Doubtful Accounts for AR Type of Allowance [Domain] Type of Allowance [Domain] [Domain] for Type of Allowance [Axis] - Doubtful Accounts for AR Allowance, net of FX Allowance, net of FX [Member] Allowance, net of FX [Member] Allowance for doubtful accounts receivable [Roll Forward] Accounts Receivable, Allowance for Credit Loss [Roll Forward] Beginning balance (Subtractions) additions Deductions (write-offs/recoveries) from reserve Allowance for Doubtful Accounts Receivable, Charge-Offs (Recoveries) Allowance for Doubtful Accounts Receivable, Charge-Offs (Recoveries) Ending balance Accumulated Other Comprehensive Loss/Income - Reclassification [Abstract] Accumulated Other Comprehensive Loss/Income - Reclassification [Abstract] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Foreign Currency Translation Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Unrealized (Loss) Gain on Available for Sale Marketable Securities AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] Interest Rate Swaps Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] Other comprehensive income (loss) before reclassifications OCI, before Reclassifications, Net of Tax, Attributable to Parent Reclassified from AOCI Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Outstanding at December 31, unvested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Outstanding at December 31, unvested (in shares) Weighted- average grant date fair value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Outstanding at December 31, unvested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (in dollars per share) Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Outstanding at December 31, unvested (in dollars per share) Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Available-for-sale securities Debt Securities, Available-for-sale [Table Text Block] Available-for-sale securities, debt maturities, amortized cost and fair value basis Investments Classified by Contractual Maturity Date [Table Text Block] Stockholders' Equity Share-based Payment Arrangement [Text Block] Schedule of Long-term Debt Instruments Schedule of Long-term Debt Instruments [Table Text Block] 2020 Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Two Years 2021 Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Three Years 2022 Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Four Years 2023 Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Five Years 2024 Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Thereafter Total undiscounted cash flows Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received Present value of lease payments Sales-type and Direct Financing Leases, Lease Receivable Difference between undiscounted cash flows and discounted cash flows Sales-type and Direct Financing Leases, Lease Receivable, Undiscounted Excess Amount