Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] 2020 Convertible Notes [Member] Two Thousand And Twenty Convertible Notes [Member] Two Thousand And Twenty Convertible Notes [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Convertible Debt [Member] Convertible Debt [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Stated interest Interest Expense, Debt, Excluding Amortization Amortization of debt discount Amortization of Debt Discount (Premium) Amortization of debt issuance costs Amortization of Debt Issuance Costs Total interest expense Interest Expense, Debt Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Assumptions Used To Value Equity-Based Payments Schedule Of Share Based Payment Award Options And Employee Stock Purchase Plan Valuation Assumptions [Table Text Block] Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans and option plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. 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[Member] TiVo Inc. 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Call option, shares Call Option Shares Number of shares which may be purchased under the convertible call option. 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[Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Term Loan B Facility [Member] Term Loan B Facility [Member] Term Loan B Facility [Member] Outstanding Principal Long-term Debt, Gross Carrying amount Long-term Debt Less: Current portion of long-term debt Long-term Debt, Current Maturities Long-term debt, less current portion Long-term Debt, Excluding Current Maturities Restructuring and Related Activities [Abstract] Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Restructuring Type [Axis] Restructuring Type [Axis] Type of Restructuring [Domain] Type of Restructuring [Domain] Facility-related Costs [Member] Facility Closing [Member] Severance Costs [Member] Employee Severance [Member] Restructuring Plan [Axis] Restructuring Plan [Axis] Restructuring Plan [Domain] Restructuring Plan [Domain] Tivo Integration Restructuring Plan [Member] Tivo Integration Restructuring Plan [Member] Tivo Integration Restructuring Plan [Member] Legacy Rovi Plans [Member] Legacy Rovi Plans [Member] Legacy Rovi Plans [Member] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Restructuring Expense Restructuring Charges Accrual adjustment Restructuring Reserve 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] Equity Award [Domain] Equity Award [Domain] Restricted Awards [Member] Restricted Stock Award or Restricted Stock Unit [Member] Restricted Stock Award or Restricted Stock Unit [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Restricted Awards (In Thousands) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, 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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) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value 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 Ending Balance (in dollars per share) 2019 Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year 2020 Long-term Debt, Maturities, Repayments of Principal in Year Two 2021 Long-term Debt, Maturities, Repayments of Principal 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Convertible, Threshold Consecutive Trading Days, Debt Instrument Trading Price Condition Maximum percentage of trading price on product sale price resulting in conversion of notes into cash or stock Maximum percentage of trading price on product sale price resulting in conversion of notes into cash or stock If the trading price per note for each day of the measurement period was less than this percentage of the product of the last reported sale price of the Company's common stock and the conversion rate on such day, the notes are eligible for conversion. 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Settlement and Impairment Provisions Document and Entity Information [Abstract] Document and Entity Information [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Emerging Growth Company Entity Emerging Growth Company Entity Small Business Entity Small Business Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Accrued restructuring costs Restructuring and Asset Impairment Charges Restructuring and Related Costs [Table Text Block] Restructuring Activities Related to Plans Schedule of Restructuring Reserve by Type of Cost [Table Text Block] Summary of Goodwill Activity Schedule of 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Single Maturity Date, within One Year, Fair Value Due in 1-2 years Available-for-sale Securities, Debt Maturities, After Year One Through Two Years, Fair Value Available-for-sale Securities, Debt Maturities, After Year One Through Two Years, Fair Value Total Debt Securities, Available-for-sale Profit Improvement Plan [Member] Profit Improvement Plan [Member] Profit Improvement Plan [Member] Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Balance at Beginning of Period Cash Settlements Payments for Restructuring Non-Cash Settlements Restructuring Reserve, Settled without Cash Other Restructuring Reserve, Translation and Other Adjustment Balance at End of Period Revolving Credit Facility [Member] Revolving Credit Facility [Member] Term Loan A Facility [Member] Term Loan A Facility [Member] Term Loan A Facility [Member] Refinancing Agreement No.1 [Member] Refinancing Agreement Number One [Member] Refinancing Agreement Number One [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] LIBOR [Member] London Interbank Offered Rate (LIBOR) [Member] Prime Rate [Member] Prime Rate [Member] Number of wholly-owned subsidiaries Number of Wholly Owned Subsidiaries Number of Wholly Owned Subsidiaries Debt instrument term Debt Instrument, Term Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Variable interest rate (percent) Debt Instrument, Basis Spread on Variable Rate LIBOR floor Debt Instrument, Variable Interest Rate, Floor Debt Instrument, Variable Interest Rate, Floor Excess cash flow payment Line of Credit Facility, Covenant Compliance, Excess Cash Flow Payment Line of Credit Facility, Covenant Compliance, Excess Cash Flow Payment Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] United States [Member] UNITED STATES United Kingdom [Member] UNITED KINGDOM Rest of world [Member] Rest of World [Member] Rest of World [Member] Revenues from External Customers and Long-Lived Assets [Line Items] Revenues from External Customers and Long-Lived Assets [Line Items] Revenues, net: Segment Information Segment Reporting Disclosure [Text Block] Weighted average grant date fair value Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Restricted awards (in dollars per share) ESPP shares (in dollars per share) Share based compensation arrangement by share based payment award equity instruments, employee purchase share rights, weighted average grant date fair value Share based compensation arrangement by share based payment award equity instruments, employee purchase share rights, weighted average grant date fair value Equity-based compensation Share-based Compensation [Abstract] Pre-tax equity-based compensation, excluding amounts included in restructuring expense Pre-tax equity-based compensation, included in restructuring expense Goodwill And Intangible Assets, Net Goodwill and Intangible Assets Disclosure [Text Block] Financial Statement Details Additional Financial Information Disclosure [Text Block] Inventory, Net Inventory, Net [Abstract] Raw materials Inventory, Raw Materials, Net of Reserves Finished goods Inventory, Finished Goods, Net of Reserves Inventory Inventory, Net 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] Computer Software and Equipment [Member] Computer Equipment [Member] Leasehold Improvements [Member] Leasehold Improvements [Member] Furniture and fixtures [Member] Furniture and Fixtures [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property and equipment, gross Property, Plant and Equipment, Gross Less: Accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property and equipment, net Property, Plant and Equipment, Net Accounts Payable and Accrued Expenses Accounts Payable and Accrued Liabilities [Abstract] Accounts payable Accounts Payable, Current Accrued compensation and benefits Employee-related Liabilities, Current Other accrued liabilities Other Accrued Liabilities, Current Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities, Current (Loss) gain on interest rate swaps Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Not Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument [Member] $250M June 2013 Swaps [Member] Two Hundred Fifty Million June Two Thousand Thirteen Swaps [Member] Two Hundred Fifty Million June Two Thousand Thirteen Swaps [Member] $125M September 2014 Swaps [Member] One Hundred Twenty Five Million September Twenty Fourteen Swaps [Member] One Hundred Twenty Five Million September Twenty Fourteen Swaps [Member] $200M September 2014 Swaps [Member] Two Hundred Million September Twenty Fourteen Swaps [Member] Two Hundred Million September Twenty Fourteen Swaps [Member] Notional amount of interest rate swaps Derivative, Notional Amount Fixed interest rate (percent) Derivative, Fixed Interest Rate Loans and Leases Receivable Disclosure [Table] Loans and Leases Receivable Disclosure [Table] Corporate Offices, Data Centers and Certain Equipment [Member] Corporate Offices, Data Centers and Certain Equipment [Member] Corporate Offices, Data Centers and Certain Equipment [Member] Maximum [Member] Maximum [Member] Loans and Leases Receivable Disclosure [Line Items] Loans and Leases Receivable Disclosure [Line Items] Term of extension option Operating Lease, Extension Term Operating Lease, Extension Term Period to terminate option Lessee, Operating Lease, Option to Terminate, Period Lessee, Operating Lease, Option to Terminate, Period Expected term of lease Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract Expected recording of right-of-use asset Lessee, Operating Lease, Lease Not yet Commenced, Expected Right-of-Use Asset Lessee, Operating Lease, Lease Not yet Commenced, Expected Right-of-Use Asset Expected recording of lease liability Lessee, Operating Lease, Lease Not yet Commenced, Expected Lease Liability Lessee, Operating Lease, Lease Not yet Commenced, Expected Lease Liability Expected de-recognition of right-of-use asset Lessee, Operating Lease, Lease Not yet Commenced, Expected De-recognition of Right-of-Use Asset Lessee, Operating Lease, Lease Not yet Commenced, Expected De-recognition of Right-of-Use Asset Expected de-recognition of lease liability Lessee, Operating Lease, Lease Not yet Commenced, Expected De-recognition of Lease Liability Lessee, Operating Lease, Lease Not yet Commenced, Expected De-recognition of Lease Liability Schedule of Weighted Average Number of Shares Schedule of Weighted Average Number of Shares [Table Text Block] Weighted Average Potential Anti-Dilutive Common Shares Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Discontinued Operations and Disposal Groups [Abstract] Income from discontinued operations, net of tax Schedule of Inventory Schedule of Inventory, Current [Table Text Block] Property and Equipment, Net Property, Plant and Equipment [Table Text Block] Accounts Payable and Accrued Expenses Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Income Statement [Abstract] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Licensing, Services and Software [Member] Licensing, Services and Software [Member] Licensing, Services and Software [Member] Hardware [Member] Hardware [Member] Hardware [Member] Revenues, net: Revenues [Abstract] Costs and expenses: Cost of Revenue [Abstract] Cost of licensing, services and software revenues, excluding depreciation and amortization of intangible assets Cost of Licensing Revenue Excluding Depreciation and Amortization of Intangible Assets Cost of Licensing Revenue Excluding Depreciation and Amortization of Intangible Assets Cost of hardware revenues, excluding depreciation and amortization of intangible assets Cost of Hardware Revenue Excluding Depreciation and Amortization of Intangible Assets Cost of Hardware Revenue Excluding Depreciation and Amortization of Intangible Assets Research and development Research and Development Expense Selling, general and administrative Selling, General and Administrative Expense Total costs and expenses Costs and Expenses Operating loss Operating Income (Loss) Interest expense Interest Expense Interest income and other, net Other Nonoperating Income (Expense) Loss on debt extinguishment Loss from continuing operations before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income tax expense Loss from continuing operations, net of tax Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Net loss Basic loss per share: Earnings Per Share, Basic [Abstract] Continuing operations (in dollars per share) Income (Loss) from Continuing Operations, Per Basic Share Discontinued operations (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Basic loss per share (in dollars per share) Earnings Per Share, Basic Weighted average shares used in computing basic per share amounts (in shares) Diluted loss per share: Earnings Per Share, Diluted [Abstract] Continuing operations (in dollars per share) Income (Loss) from Continuing Operations, Per Diluted Share Discontinued operations (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Diluted loss per share (in dollars per share) Earnings Per Share, Diluted Weighted average shares used in computing diluted per share amounts (in shares) Dividends declared per share (in dollars per share) Common Stock, Dividends, Per Share, Declared Customer [Axis] Customer [Axis] Customer [Domain] Customer [Domain] AT&T [Member] AT&T Inc. [Member] AT&T Inc. [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Accounts Receivable [Member] Concentration risk (percent) Concentration Risk, Percentage Impairment losses Contract with Customer, Asset, Credit Loss Expense Revenue recognized Contract with Customer, Liability, Revenue Recognized Revenue from remaining performance obligation Revenue, Remaining Performance Obligation, Amount Remainder of 2019 Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Remainder of Fiscal Year, Percentage Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Remainder of Fiscal Year, Percentage 2020 Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Year Two, Percentage Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Year Two, Percentage 2021 Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Year Three, Percentage Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Year Three, Percentage 2022 Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Year Four, Percentage Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Year Four, Percentage 2023 Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Year Five, Percentage Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Year Five, Percentage Thereafter Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, After Year Five, Percentage Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, After Year Five, Percentage Revenues Revenue from Contract with Customer [Text Block] Subsidiary or Equity Method Investee, Sale of Stock by Subsidiary or Equity Investee [Table] Subsidiary or Equity Method Investee, Sale of Stock by Subsidiary or Equity Investee [Table] Expected volatility (percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected term (years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Risk free interest rate (percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Fair Value Measurements Fair Value Disclosures [Text Block] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring [Member] Fair Value, Measurements, Recurring [Member] Fair Value Assets, Nature of Assets [Axis] Fair Value, by Balance Sheet Grouping [Axis] Fair Value, by Balance Sheet Grouping [Axis] Fair Value Assets, Nature of Assets [Domain] Fair Value Assets Nature Of Assets [Domain] Fair Value Assets, Nature of Assets [Domain] Cash and cash equivalents/Short-term marketable securities [Member] Current Assets [Member] Current Assets [Member] Long-term marketable securities [Member] Non Current Assets [Member] Non-Current Assets [Member] Other long-term liabilities [Member] Non Current Liabilities [Member] Non Current Liabilities [Member] Financial Instruments [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Money Market Funds [Member] Money Market Funds [Member] Corporate Debt Securities [Member] Corporate Debt Securities [Member] U.S. Treasuries / Agencies [Member] US Government Agencies Debt Securities [Member] Interest Rate Swaps [Member] Interest Rate Swap [Member] Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Cash and Cash Equivalents [Member] Cash Equivalents [Member] Quoted Prices In Active Markets (Level 1) [Member] Fair Value, Inputs, Level 1 [Member] Fair value assets measured on recurring basis Assets, Fair Value Disclosure Fair value liabilities measured on a recurring basis Financial and Nonfinancial Liabilities, Fair Value Disclosure Available-For-Sale And Other Investment Securities Schedule Of Available For Sale Securities Including Cash and Cash Equivalents [Table Text Block] Schedule Of Available For Sale Securities Including Cash and Cash Equivalents [Table Text Block] Available-For-Sale Debt Investments At Fair Value Investments Classified by Contractual Maturity Date [Table Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Restricted Awards [Member] Convertible Notes Payable [Member] Convertible Notes Payable [Member] Warrants [Member] Warrant [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Weighted average potential shares excluded from the calculation of Diluted EPS Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Description of Business Business Description [Policy Text Block] The entire disclosure for the business description. Business description describes the nature and type of organization including but not limited to organizational structure as may be applicable to holding companies, parent and subsidiary relationships, business divisions, business units, business segments, affiliates and information about significant ownership of the reporting entity. Basis of Presentation and Principles of Consolidation Basis of Presentation and Principles Of Consolidation [Policy Text Block] The entire disclosure for the basis of presentation concepts and principles of consolidation. Basis of presentation describes the underlying basis used to prepare the financial statements. Principles of consolidation discloses the accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting. The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary. Use of Estimates Use of Estimates, Policy [Policy Text Block] Right-of-Use Assets and Lease Liabilities Lessee, Leases [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Statement of Financial Position [Abstract] Preferred Stock, par value (in usd 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 Preferred Stock, shares outstanding Preferred Stock, Shares Outstanding Common Stock, par value (in usd per share) Common Stock, Par or Stated Value Per Share Common Stock, shares authorized Common Stock, Shares Authorized Common Stock, shares issued Common Stock, shares outstanding Common Stock, Shares, Outstanding Treasury Stock, shares Concentration Risk [Table] Concentration Risk [Table] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Customer Concentration Risk [Member] Customer Concentration Risk [Member] Virgin Media [Member] Virgin Media [Member] Virgin Media [Member] DISH Network [Member] DISH Network L.L.C. [Member] DISH Network L.L.C. [Member] Sales Revenue, Net [Member] Sales Revenue, Net [Member] Concentration Risk [Line Items] Concentration Risk [Line Items] 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 [Member] Operating Segments [Member] Corporate [Member] Corporate, Non-Segment [Member] Subsegments [Axis] Subsegments [Axis] Subsegments [Domain] Subsegments [Domain] Platform Solutions [Member] Platform Solutions [Member] Platform Solutions [Member] Software and Services [Member] Software and Services [Member] Software and Services [Member] Other [Member] Other Subsegment [Member] Other Subsegment [Member] US Pay TV Providers [Member] US Pay TV Providers [Member] US Pay TV Providers [Member] Consumer Electronics Manufacturers [Member] Consumer Electronics Manufacturers [Member] Consumer Electronics Manufacturers [Member] New Media, International Pay TV Providers and Other [Member] New Media, International Pay TV Providers and Other [Member] New Media, International Pay TV Providers and Other [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Number of reportable segments Number of Reportable Segments Adjusted Operating Expenses Adjusted Operating Expenses Operating expenses excluding depreciation, amortization of intangible assets, restructuring and asset impairment charges, equity-based compensation, contested proxy election costs, transaction, transition and integration expenses and changes in contingent consideration. Adjusted EBITDA Adjusted Earnings Before Interest, Taxes, Depreciation and Amortization Earnings excluding depreciation, amortization of intangible assets, restructuring and asset impairment charges, equity-based compensation, contested proxy election costs, transaction, transition and integration expenses and changes in contingent consideration Separation costs Separation Costs Separation Costs Transition and integration costs Transition and Integration Costs Transition and Integration Costs Earnout amortization Business Combinations, Earnout Settlement Business Combinations, Earnout Settlement CEO transition cash costs Officers' Transition Compensation Costs Officers' Transition Compensation Costs Remeasurement of contingent consideration Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Loss on debt extinguishment ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Short-term marketable securities Marketable Securities, Current Accounts receivable, net Inventory Prepaid expenses and other current assets Prepaid Expense and Other Assets Total current assets Assets, Current Long-term marketable securities Marketable Securities, Noncurrent Property and equipment, net Intangible assets, net Goodwill Right-of-use assets Other long-term assets Other Assets, Noncurrent Total assets Assets LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable and accrued expenses Unearned revenue Deferred Revenue, Current Current portion of long-term debt Total current liabilities Liabilities, Current Unearned revenue, less current portion Deferred Revenue, Noncurrent Deferred tax liabilities, net Deferred Income Tax Liabilities, Net Long-term lease liabilities Other long-term liabilities Other Liabilities, Noncurrent Total liabilities Liabilities Contingencies (Note 11) Commitments and Contingencies Stockholders' equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Preferred stock, $0.001 par value, 5,000 shares authorized; no shares issued or outstanding Preferred Stock, Value, Issued Common stock, $0.001 par value, 250,000 shares authorized; 126,841 shares issued and 124,895 shares outstanding as of March 31, 2019; and 125,781 shares issued and 123,975 shares outstanding as of December 31, 2018 Common Stock, Value, Issued Treasury stock, 1,946 shares and 1,806 shares as of March 31, 2019 and December 31, 2018, respectively, at cost Treasury Stock, Value Additional paid-in capital Additional Paid in Capital Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated deficit Retained Earnings (Accumulated Deficit) Total stockholders’ equity Total liabilities and stockholders’ equity Liabilities and Equity Discontinued Operations Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Operating Lease Liabilities Lessee, Operating Lease, Liability, Payment, Due [Abstract] Lessee, Operating Lease, Liability, Payment, Due [Abstract] Remainder of 2019 Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year 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 Thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Five Total lease payments Lessee, Operating Lease, Liability, Payments, Due Less: imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Total Sublease Income Lessee, Operating Lease, Liability, Sublease Income [Abstract] Lessee, Operating Lease, Liability, Sublease Income [Abstract] Remainder of 2019 Lessee, Operating Lease, Liability, Sublease Income, Remainder of Fiscal Year Lessee, Operating Lease, Liability, Sublease Income, Remainder of Fiscal Year 2020 Lessee, Operating Lease, Liability, Sublease Income, Payments, Due Year Two Lessee, Operating Lease, Liability, Sublease Income, Payments, Due Year Two 2021 Lessee, Operating Lease, Liability, Sublease Income, Payments, Due Year Three Lessee, Operating Lease, Liability, Sublease Income, Payments, Due Year Three 2022 Lessee, Operating Lease, Liability, Sublease Income, Payments, Due Year Four Lessee, Operating Lease, Liability, Sublease Income, Payments, Due Year Four 2023 Lessee, Operating Lease, Liability, Sublease Income, Payments, Due Year Five Lessee, Operating Lease, Liability, Sublease Income, Payments, Due Year Five Thereafter Lessee, Operating Lease, Liability, Sublease Income, Payments, Due after Year Five Lessee, Operating Lease, Liability, Sublease Income, Payments, Due after Year Five Total lease payments Lessee, Operating Lease, Liability, Sublease Income Lessee, Operating Lease, Liability, Sublease Income Less: imputed interest Lessee, Operating Lease, Liability, Sublease Income, Imputed Interest Lessee, Operating Lease, Liability, Sublease Income, Imputed Interest Total Lessee, Operating Lease, Liability, Sublease Income, Lease Liability Lessee, Operating Lease, Liability, Sublease Income, Lease Liability Net Operating Lease Payments Net Operating Lease Payments [Abstract] Net Operating Lease Payments [Abstract] Remainder of 2019 Net Operating Lease Payments, Remainder of Fiscal Year Net Operating Lease Payments, Remainder of Fiscal Year 2020 Net Operating Lease Payments, Due Year Two Net Operating Lease Payments, Due Year Two 2021 Net Operating Lease Payments, Due Year Three Net Operating Lease Payments, Due Year Three 2022 Net Operating Lease Payments, Due in Four Years Net Operating Lease Payments, Due in Four Years 2023 Net Operating Lease Payments, Due Year Five Net Operating Lease Payments, Due Year Five Thereafter Net Operating Lease Payments, Due after Year Five Net Operating Lease Payments, Due after Year Five Total lease payments Net Operating Lease Payments Net Operating Lease Payments Less: imputed interest Net Operating Lease Payments, Imputed Interest Net Operating Lease Payments, Imputed Interest Total Net Operating Lease Payments, Lease Liability Net Operating Lease Payments, Lease Liability Carrying Value and Par Value of Debt Schedule of Long-term Debt Instruments [Table Text Block] Convertible Debt Convertible Debt [Table Text Block] Components of Interest Expense Interest Income and Interest Expense Disclosure [Table Text Block] Schedule of Maturities of Long-term Debt Schedule of Maturities of Long-term Debt [Table Text Block] Summary of Interest Rate Swaps Schedule of Interest Rate Derivatives [Table Text Block] Non-marketable equity method investments Equity Method Investments, Non-Marketable Equity Method Investments, Non-Marketable Securities owned not readily marketable Securities Owned Not Readily Marketable Impairment of equity securities without a readily determinable fair value Equity Method Investment, Non-Marketable, Other than Temporary Impairment Equity Method Investment, Non-Marketable, Other than Temporary Impairment Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Total Cash And Cash Equivalents [Member] Cash and Cash Equivalents [Member] Cash [Member] Cash [Member] Cash Equivalents [Member] Total Cash, Cash Equivalents And Marketable Securities [Member] Cash Cash Equivalents And Investments [Member] Cash, Cash Equivalents and Investments [Member] Money Markets Funds [Member] U.S. Treasuries / Agencies [Member] US Treasury and Government [Member] Marketable Securities [Member] Available-for-sale Securities [Member] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] Unrealized Gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Unrealized Losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Fair Value Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Common Stock [Member] Class of Stock [Line Items] Class of Stock [Line Items] Weighted average potential shares excluded from the calculation of Diluted EPS (in shares) Share price (in us dollars per share) Share Price Authorized stock repurchase amount Stock Repurchase Program, Authorized Amount Stock repurchase (in shares) Treasury Stock, Shares, Acquired Remaining number of shares authorized to be repurchased Stock Repurchase Program, Remaining Authorized Repurchase Amount Tax withholding for share-based compensation (shares) Tax withholding for share-based compensation Dividend payments Statement of Comprehensive Income [Abstract] Other comprehensive income, net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Change in foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Change in unrealized gains (losses) on marketable securities Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax Less: Reclassification adjustment on sale Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Other comprehensive income, net of tax Comprehensive loss Comprehensive Income (Loss), Net of Tax, Attributable to Parent Finite-Lived Intangible Assets by Major Class [Axis] Patents [Member] Patents [Member] Asset Acquisition [Axis] Asset Acquisition [Axis] Asset Acquisition [Axis] Asset Acquisition [Domain] Asset Acquisition [Domain] [Domain] for Asset Acquisition [Axis] Portfolio of Patents [Member] Portfolio of Patents [Member] Portfolio of Patents [Member] Payments for purchase of patents Acquired finite-lived intangible assets weighted average useful life Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Principal outstanding Less: Unamortized debt discount Debt Instrument, Unamortized Discount Less: Unamortized debt issuance costs Unamortized Debt Issuance Expense Equity component Debt Instrument, Convertible, Carrying Amount of Equity Component