Earnings Per Share [Abstract] Numerator Net Income (Loss) Attributable to Parent [Abstract] Net loss Net Income (Loss) Attributable to Parent Less: Stock dividend payable and transaction costs Redeemable Preferred Stock Dividends Net loss available to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Denominator Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted-average common shares outstanding used in computing basic and diluted net loss per common share (in shares) Weighted Average Number of Shares Outstanding, Basic and Diluted Net loss per common share, basic and diluted (in dollars per share) Earnings Per Share, Basic and Diluted Fair Value Disclosures [Abstract] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Quoted Prices in Active Markets for Identical Instruments (Level 1) Fair Value, Inputs, Level 1 [Member] Significant Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Money market funds Money Market Funds [Member] Corporate debt securities Corporate Debt Securities [Member] 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] Total assets measured at fair value Assets, Fair Value Disclosure Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Ticketfly Ticketfly, Inc. [Member] Ticketfly, Inc. [Member] Rdio Rdio, Inc. - Technology And Intellectual Property [Member] Rdio, Inc. - Technology And Intellectual Property [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Purchase consideration Business Combination, Consideration Transferred Additional purchase consideration Other Payments to Acquire Businesses Shares issued in acquisition (in shares) Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Aggregate purchase price Payments to Acquire Businesses, Gross Organization, Consolidation and Presentation of Financial Statements [Abstract] Other long-term assets Other Assets, Noncurrent [Abstract] Long-term security deposits Security Deposit Other Other Assets, Miscellaneous, Noncurrent Ticketing contract advances—long-term Prepaid Contract Expense, Noncurrent Prepaid Contract Expense, Noncurrent Total other long-term assets Other Assets, Noncurrent Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Other Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Income Tax Disclosure [Abstract] Reconciliation of the statutory federal rate and the company's effective tax rate Effective Income Tax Rate Reconciliation, Percent [Abstract] U.S. federal taxes at statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent State taxes, net of federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Permanent differences Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent Foreign rate differential Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent Federal and state credits, net of reserve Effective Income Tax Rate Reconciliation, Federal and State Credits Net of Reserve The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by federal and state credits net of reserve generated or utilized under enacted tax laws during the period. Impact of acquired deferred tax assets and liabilities Effective Income Tax Rate Reconciliation, Deferred Taxes, Percent Effective Income Tax Rate Reconciliation, Deferred Taxes, Percent Change in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Change in rate Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent Deferred adjustments Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Effective tax rate Effective Income Tax Rate Reconciliation, Percent Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] United States UNITED STATES International Non-US [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Revenues Revenue, Net Income Statement [Abstract] Revenue Revenues [Abstract] Advertising Advertising Revenue Subscription and other Subscription and Circulation Revenue Ticketing service Service And Processing Revenue Service And Processing Revenue Total revenue Cost of revenue Cost of Revenue [Abstract] Cost of revenue—Content acquisition costs Direct Operating Cost, Royalty Expense Cost of revenue—Other Other Cost of Operating Revenue Cost of revenue—Ticketing service Cost of Services Total cost of revenue Cost of Revenue Gross profit Gross Profit Operating expenses Operating Expenses [Abstract] Product development Research and Development Expense (Excluding Acquired in Process Cost) Sales and marketing Selling and Marketing Expense General and administrative General and Administrative Expense Goodwill impairment Goodwill, Impairment Loss Contract termination fees Gain (Loss) on Contract Termination Total operating expenses Operating Expenses Loss from operations Operating Income (Loss) Interest expense Interest Expense Other income, net Other Nonoperating Income (Expense) Total other expense, net Nonoperating Income (Expense) Loss before benefit from income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Benefit from income taxes Income Tax Expense (Benefit) Net loss Net loss available to common stockholders Basic and diluted net loss per common share (in dollars per share) Weighted-average common shares outstanding used in computing basic and diluted net loss per share (in shares) 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] Sold Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Disposal Group Name [Axis] Disposal Group Name [Axis] Disposal Group Name [Domain] Disposal Group Name [Domain] KXMZ KXMZ [Member] KXMZ [Member] Ticketfly and KXMZ Ticketfly, Inc. and KXMZ [Member] Ticketfly, Inc. and KXMZ [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] Total purchase price Disposal Group, Including Discontinued Operation, Consideration Cash portion of purchase price Disposal Group, Including Discontinued Operation, Consideration, Cash Disposal Group, Including Discontinued Operation, Consideration, Cash Convertible subordinated promissory note Disposal Group, Including Discontinued Operation, Consideration, Notes Receivable Disposal Group, Including Discontinued Operation, Consideration, Notes Receivable Unamortized discount Receivable with Imputed Interest, Discount Costs to sell Business Acquisition, Transaction Costs Working capital and certain indemnification provisions adjustments Disposal Group, Including Discontinued Operation, Consideration Adjustments, Working Capital Disposal Group, Including Discontinued Operation, Consideration Adjustments, Working Capital Net purchase price Disposal Group, Including Discontinued Operation, Net Purchase Price Disposal Group, Including Discontinued Operation, Net Purchase Price Asset Impairment Charges Asset Impairment Charges Fair value of net assets Disposal Group, Including Discontinued Operation, Fair Value Of Net Assets Disposal Group, Including Discontinued Operation, Fair Value Of Net Assets Loss on sale Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Transfers of cumulative translation adjustments, Disposal Group, Including Discontinued Operation, Foreign Currency Translation Gains (Losses) Proceeds from sales of subsidiaries, net of cash Proceeds from Divestiture of Businesses, Net of Cash Divested Less: Decrease in cash held for sale Cash Divested from Deconsolidation Cash price adjustments Disposal Group, Including Discontinued Operation, Consideration Adjustments, Cash Price Disposal Group, Including Discontinued Operation, Consideration Adjustments, Cash Price Number of reportable segments Number of Reportable Segments Total current assets Disposal Group, Including Discontinued Operation, Other Assets, Current Long-term assets Disposal Group, Including Discontinued Operation, Assets, Noncurrent Total liabilities Disposal Group, Including Discontinued Operation, Liabilities 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, beginning balance Unrecognized Tax Benefits Increases related to tax positions taken during a prior year Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Decreases related to tax positions taken during a prior year Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Increases related to tax positions taken during the current year Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Unrecognized tax benefits, ending balance Goodwill Goodwill [Roll Forward] Beginning balance Goodwill Goodwill resulting from business combination and purchase price adjustments Goodwill, Acquired During Period Goodwill impairment Goodwill related to disposed assets Disposal Group, Including Discontinued Operation, Goodwill Effect of currency translation adjustment Goodwill, Translation and Purchase Accounting Adjustments Ending balance Subsequent Events [Abstract] Subsequent Event Subsequent Events [Text Block] Schedule of cash, cash equivalents and investments Cash, Cash Equivalents and Investments [Table Text Block] Summary of available-for-sale securities' adjusted cost, gross unrealized gains, gross unrealized losses and fair value by significant investment category Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Schedule of available-for-sale investments by contractual maturity date Investments Classified by Contractual Maturity Date [Table Text Block] Summary of available-for-sale securities' fair value and gross unrealized losses Available-for-sale Securities [Table Text Block] Schedule of accounts receivable, net Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Schedule of allowance for doubtful accounts Schedule of Credit Losses for Financing Receivables, Current [Table Text Block] Schedule of prepaid and other current assets Schedule of Other Current Assets [Table Text Block] Schedule of other long-term assets Schedule of Other Assets, Noncurrent [Table Text Block] Schedule of property and equipment, net Property, Plant and Equipment [Table Text Block] Schedule of other current liabilities Other Current Liabilities [Table Text Block] Schedule of other long-term liabilities Other Noncurrent Liabilities [Table Text Block] Number of voting rights per share Common Stock, Voting Rights Per Share Represents the description of voting rights of common stock. Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Convertible debt Convertible Debt [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] 1.75% convertible senior notes due 2020 Convertible Senior Notes Due 2020 [Member] Convertible Senior Notes Due 2020 [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Interest rate Debt Instrument, Interest Rate, Stated Percentage Debt instrument, conversion price (in dollars per share) Debt Instrument, Convertible, Conversion Price Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Number of owned securities that were in an unrealized loss position Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions Unrealized losses deemed to be other-than-temporary Other than Temporary Impairment Losses, Investments, Available-for-sale Securities Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Other current assets Other Current Assets [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Software developed for internal use Software Development [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Receivables for the reimbursement of costs of leasehold improvements in connection with operating leases Leasehold Improvements, Receivable Leasehold Improvements, Receivable Depreciation Depreciation Expected useful lives (years) Property, Plant and Equipment, Useful Life Capitalized cost related to internal use software and website development costs Capitalized Computer Software, Net Accumulated amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Amortization expense Amortization Temporary Equity Disclosure [Abstract] Schedule of redeemable convertible preferred stock Schedule of Stock by Class [Table Text Block] Commitments and Contingencies Disclosure [Abstract] Rent expenses Operating Leases, Rent Expense, Net Deferred rent Deferred Rent Credit Content acquisition costs Payments for Royalties Amortization of prepaid content acquisition costs Amortization of Advance Royalty Total future minimum guarantee payments Royalty Guarantees, Commitments, Amount Future minimum guarantee commitments to be paid this year Royalty Guarantees, Commitments, Current Royalty Guarantees, Commitments, Current Loss Contingencies [Table] Loss Contingencies [Table] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Indemnification agreement Indemnification Agreement [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Accrued indemnification liabilities Loss Contingency Accrual Schedule of Acquired Indefinite-lived Intangible Assets by Major Class [Table] Schedule of Acquired Indefinite-lived Intangible Assets by Major Class [Table] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] FCC license—broadcast radio Licensing Agreements [Member] Acquired Indefinite-lived Intangible Assets [Line Items] Acquired Indefinite-lived Intangible Assets [Line Items] Indefinite-lived intangible assets Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract] Indefinite-lived intangible assets Indefinite-Lived Intangible Assets (Excluding Goodwill) Disposal of Intangible Assets Disposal Group, Including Discontinued Operation, Intangible Assets Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] 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] Patents Patents [Member] Developed technology Developed Technology Rights [Member] Customer relationships—clients Customer Relationships, Venues And Promoters [Member] Customer Relationships, Venues And Promoters [Member] Customer relationships—users Customer Relationships, Users [Member] Customer Relationships, Users [Member] Trade names Trade Names [Member] Acquired Finite-Lived Intangible Assets [Line Items] Acquired Finite-Lived Intangible Assets [Line Items] Finite-lived intangible assets Finite-Lived Intangible Assets, Net [Abstract] Gross Carrying Amount Finite-Lived Intangible Assets, Gross Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Disposal of Intangible Assets Disposal Group, Including Discontinued Operation, Indefinite-Lived Intangible Assets Disposal Group, Including Discontinued Operation, Indefinite-Lived Intangible Assets Net Carrying Value Finite-Lived Intangible Assets, Net Total intangible assets, Gross Carrying Amount Intangible Assets, Gross (Excluding Goodwill) Total intangible assets, Accumulated Amortization Total intangible assets, Net Carrying Value Intangible Assets, Net (Excluding Goodwill) Accounts receivable, net Accounts Receivable, Net [Abstract] Accounts receivable Accounts Receivable, Gross, Current Allowance for doubtful accounts Allowance for Doubtful Accounts Receivable Total accounts receivable, net Receivables, Net, Current Disclosure of Compensation Related Costs, Share-based Payments [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] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2011 Plan Equity Incentive Plan 2011 [Member] Represents information pertaining to the entity's 2011 Equity Incentive Plan. This plan provides for the issuance of stock options, restricted stock units and other stock-based awards. 2004 Plan Stock Option Plan 2004 [Member] Stock Option Plan 2004 [Member] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Stock options Employee And Non Employee Stock Options [Member] An arrangement whereby an employee and non-employee is entitled to receive in the future, subject to vesting and other restrictions, a number of shares in the entity at a specified price, as defined in the agreement. Shares issuable pursuant to the ESPP Employee Stock [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Shares of common stock reserved for the issuance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Shares of common stock previously reserved but unissued (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Annual fixed increase alternative, increase in shares of common stock reserved for issuance (in shares) Share Based Compensation Arrangement by Share Based Payment Award, Additional Shares that May be Authorized Annually Under the fixed increase alternative, represents the potential annual increase in shares of common stock reserved for issuance as share-based compensation. This alternative may be used, provided that, it is the least number of additional shares reserved for issuance under the three alternatives. Annual percentage increase alternative, increase in common stock reserved for issuance as a percentage of common stock outstanding Share Based Compensation Arrangement by Share Based Payment Award, Additional Shares that May be Authorized Annually Percentage Under the automatic percentage increase alternative, represents the potential annual increase in common stock reserved for issuance as share-based compensation, expressed as a percentage of common stock outstanding at the end of the prior fiscal year. This alternative may be used, provided that, it is the least number of additional shares reserved for issuance under the three alternatives. Expiration term (no more than) Share Based Compensation Arrangements by Share Based Payment Award, Options Expiration Term The period of time, from the grant date until the time at which the share-based award expires. Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Percentage of payroll deductions of eligible employees to purchase shares of common stock (up to) Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate Maximum amount of payroll deductions eligible employees can use per calendar year Share Based Compensation Arrangement by Share Based Payment Award Maximum Employee Subscription The maximum amount of annual salary that an employee is permitted to utilize with respect to the plan. Offering period Share-Based Compensation Arrangement By Share-Based Payment Award, Offering Period Represents the offering period for award under the share based compensation. Exercise price as a percentage of the fair market value of the common stock Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Decrease in income tax provision Increase (Decrease) in Income Tax Expense (Benefit) Represents the increase (decrease) during the period in the sum of current income tax expense or benefit and deferred income tax expense or benefit pertaining to continuing operations. Release of valuation allowance as a result of acquisitions Valuation Allowances and Reserves, Period Increase (Decrease), Acquisitions Valuation Allowances and Reserves, Period Increase (Decrease), Acquisitions Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Federal Domestic Tax Authority [Member] State State and Local Jurisdiction [Member] Acquisitions Acquisitions [Member] Acquisitions [Member] Operating Loss Carryforwards [Line Items] Operating Loss Carryforwards [Line Items] Net operating loss carryforwards Operating Loss Carryforwards Tax credit carryforwards Tax Credit Carryforward, Amount Tax credit carryforwards that do not expire Tax Credit Carryforward, Amount without Expiration Represents the amount of the tax credit carryforward without expiration, before tax effects, available to reduce future taxable income under the enacted tax laws. Tax credit carryforwards that will expire beginning in 2024 Tax Credit Carryforward, Amount with Expiration Represents the amount of the tax credit carryforward with expiration, before tax effects, available to reduce future taxable income under the enacted tax laws. Net deferred tax asset change Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Increase (Decrease) In Deferred Tax Asset Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Increase (Decrease) In Deferred Tax Asset Net deferred tax asset allowance change Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Increase (Decrease) In Deferred Tax Asset Valuation Allowance Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Increase (Decrease) In Deferred Tax Asset Valuation Allowance Release of federal valuation allowance Tax Cuts and Jobs Act of 2017, Change in Tax Rate, Deferred Tax Asset, Income Tax Expense (Benefit) Tax Cuts and Jobs Act of 2017, Change in Tax Rate, Deferred Tax Asset, Income Tax Expense (Benefit) Increase in valuation allowance Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Unrecognized tax benefits Income tax, penalties and interest expense Income Tax Examination, Penalties and Interest Expense Schedule of loss before provision for income taxes by jurisdiction Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Schedule of provision for income taxes Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of reconciliation of the statutory federal rate and effective tax rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of major components of deferred tax assets and liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Schedule of reconciliation of beginning and ending amounts of unrecognized tax benefits Summary of Income Tax Contingencies [Table Text Block] Components of deferred tax assets and liabilities Components of Deferred Tax Assets and Liabilities [Abstract] Deferred tax assets Components of Deferred Tax Assets [Abstract] Net operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Tax credit carryforwards Deferred Tax Assets, Tax Credit Carryforwards Allowances and other Deferred Tax Assets Allowances and Other Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from allowances and other. Stock options Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Depreciation and amortization Deferred Tax Assets, Property, Plant and Equipment Total deferred tax assets Deferred Tax Assets, Gross Valuation allowance Deferred Tax Assets, Valuation Allowance Total deferred tax assets, net of valuation allowance Deferred Tax Assets, Net of Valuation Allowance Deferred tax liabilities Components of Deferred Tax Liabilities [Abstract] Convertible debt Deferred Tax Liabilities, Financing Arrangements Depreciation and amortization Deferred Tax Liabilities, Property, Plant and Equipment Total deferred tax liabilities Deferred Tax Liabilities, Gross Net deferred tax liabilities Deferred Tax Liabilities, Net Debt Disclosure [Abstract] Debt Instruments Debt 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 Short-term investments Short-term Investments Accounts receivable, net of allowance of $3,633 at December 31, 2016 and $5,352 at December 31, 2017 Prepaid content acquisition costs Prepaid Royalties Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Convertible promissory note receivable Receivable with Imputed Interest, Net Amount Long-term investments Long-term Investments Property and equipment, net Property, Plant and Equipment, Net Goodwill Intangible assets, net Other long-term assets Total assets Assets Liabilities, redeemable convertible preferred stock and stockholders’ equity Liabilities and Equity [Abstract] Current liabilities Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued liabilities Accrued Liabilities, Current Accrued content acquisition costs Accrued Royalties, Current Accrued compensation Employee-related Liabilities, Current Deferred revenue Deferred Revenue, Current Other current liabilities Other Liabilities, Current Total current liabilities Liabilities, Current Long-term debt Long-term Debt Other long-term liabilities Other Liabilities, Noncurrent Total liabilities Liabilities Commitments and contingencies (Note 11) Commitments and Contingencies Redeemable convertible preferred stock, $0.0001 par value, 10,000,000 shares authorized: 480,000 shares issued and outstanding at December 31, 2017 (liquidation preference $480,000,000) Temporary Equity, Carrying Amount, Including Portion Attributable to Noncontrolling Interests Stockholders’ equity Stockholders' Equity Attributable to Parent [Abstract] Common stock, $0.0001 par value, 1,000,000,000 shares authorized: 235,162,757 shares issued and outstanding at December 31, 2016 and 250,867,462 at December 31, 2017 Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Accumulated deficit Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Total stockholders’ equity Stockholders' Equity Attributable to Parent Total liabilities, redeemable convertible preferred stock and stockholders’ equity Liabilities and Equity Number of operating segments Number of Operating Segments Outstanding Stock Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Balance at the beginning of the period (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 Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Expired (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period Balance at the end of the period (in shares) Vested and exercisable at the end of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Expected to vest at the end of the period (in shares) Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Expected To Vest, Outstanding, Number Share-Based Compensation Arrangement By Share-Based Payment Award, Options, 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] Balance at the beginning of the period (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 Forfeited (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Expired (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Balance at the end of the period (in dollars per share) Vested and exercisable at the end of the period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Expected to vest at the end of the period (in dollars per share) Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Expected To Vest, Weighted Average Exercise Price Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Expected To Vest, Weighted Average Exercise Price Weighted-Average Remaining Contractual Term (in years) Share Based Compensation Arrangement by Share Based Payment Award, Options Weighted Average Remaining Contractual Term [Abstract] Outstanding at the beginning of the period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Outstanding at the end of the period Vested and exercisable at the end of the period Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Expected to vest at the end of the period Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Expected To Vest, Weighted Average Remaining Contractual Term Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Expected To Vest, Weighted Average Remaining Contractual Term Aggregate Intrinsic Value Share Based Compensation Arrangement by Share Based Payment Award, Options Intrinsic Value [Abstract] Aggregate intrinsic value beginning of the period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Aggregate intrinsic value end of the period Vested and exercisable at the end of the period Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Expected to vest at the end of the period Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Expected To Vest, Aggregate Intrinsic Value Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Expected To Vest, Aggregate Intrinsic Value Fair value per share of common stock (in dollars per share) Common Stock Fair Value Per Share Represents the fair value per share of the common stock of the reporting entity. Allowance for Doubtful Accounts Allowance for Doubtful Accounts Receivable [Roll Forward] Balance at Beginning of Period Additions Valuation Allowances and Reserves, Additions for Adjustments Write-offs, Net of Recoveries Allowance for Doubtful Accounts Receivable, Write-offs Balance at End of Period Statement of Comprehensive Income [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 net unrealized loss on marketable securities Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Total comprehensive loss Comprehensive Income (Loss), Net of Tax, Attributable to Parent Receivables [Abstract] Convertible Promissory Note Receivable Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Other long-term liabilities Other Liabilities, Noncurrent [Abstract] Long-term deferred rent Deferred Rent Credit, Noncurrent Other Other Sundry Liabilities, Noncurrent Total other long-term liabilities Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Adjusted Cost Available-for-sale Securities, Amortized Cost Basis Unrealized Gains Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax Unrealized Losses Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax Fair Value Available-for-sale Securities Restructuring and Related Activities [Abstract] Reduction in force Restructuring and Related Cost, Number of Positions Eliminated, Period Percent 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] Employee severance and benefits costs Employee Severance [Member] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Expected cash expenditures Restructuring and Related Cost, Incurred Cost Total reduction in force expenses Restructuring and Related Cost, Cost Incurred to Date Reduction of headcount, employees Restructuring and Related Cost, Number of Positions Eliminated Schedule of fair value of financial assets and liabilities Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Line of Credit Facility [Table] Line of Credit Facility [Table] Notes 2015 credit facility amendment 2015 Credit Facility Amendment [Member] 2015 Credit Facility Amendment [Member] 2017 credit facility 2017 Credit Facility [Member] 2017 Credit Facility [Member] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Redemption, period 1 Debt Instrument, Redemption, Period One [Member] Redemption, period 2 Debt Instrument, Redemption, Period Two [Member] Redemption, period 3 Debt Instrument, Redemption, Period Three [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Line of credit Line of Credit [Member] Letter of credit Letter of Credit [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Alternate base rate Debt Instrument Variable Rate Base Alternate Base Rate [Member] The alternate base rate used to calculate the variable interest rate of the debt instrument. LIBOR London Interbank Offered Rate (LIBOR) [Member] Debt Instruments Line of Credit Facility [Line Items] Aggregate principal amount Debt Instrument, Face Amount Annual fronting fee percent Line of Credit Facility, Commitment Fee Percentage Net proceeds from sale of debt Proceeds from Debt, Net of Issuance Costs Payments for capped call transactions Payments for Derivative Instrument, Financing Activities Debt instrument, conversion ratio Debt Instrument, Convertible, Conversion Ratio Debt instrument, threshold percentage of stock price trigger Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger Debt instrument, threshold trading days Debt Instrument, Convertible, Threshold Trading Days Debt instrument, threshold consecutive trading days Debt Instrument, Convertible, Threshold Consecutive Trading Days Debt instrument, threshold notice trading days Debt Instrument, Convertible, Threshold Notice Trading Days Debt Instrument, Convertible, Threshold Notice Trading Days Debt instrument, redemption price, percentage of principal Debt Instrument, Redemption Price, Percentage Debt conversion, maximum number of shares of common stock convertible by notes (shares) Debt Conversion, Converted Instrument, Shares Debt Conversion, Converted Instrument, Shares Debt instrument, threshold note trading days Debt Instrument, Convertible, Threshold Note Trading Days Debt Instrument, Convertible, Threshold Note Trading Days Debt instrument, threshold consecutive note trading days Debt Instrument, Convertible, Threshold Consecutive Note Trading Days Debt Instrument, Convertible, Threshold Consecutive Note Trading Days Debt instrument, threshold principle amount of note trigger Debt Instrument, Convertible, Threshold Principle Amount of Note Trigger Debt Instrument, Convertible, Threshold Principle Amount of Note Trigger Debt instrument, threshold percentage of note price trigger Debt Instrument, Convertible, Threshold Percentage Of Note Price Trigger Debt Instrument, Convertible, Threshold Percentage Of Note Price Trigger Value of debt Debt Instrument, Fair Value Disclosure Carrying amount of equity component reported in additional paid-in-capital Debt Instrument, Convertible, Carrying Amount of Equity Component Debt fees and expenses Debt Instrument, Fee Amount Initial cap price (in dollars per share) Derivative, Cap Price Share price (in dollars per share) Share Price Maximum borrowings available Line of Credit Facility, Maximum Borrowing Capacity Option to increase the commitment amount Line of Credit Facility, Option To Increase Maximum Borrowing Capacity Line of Credit Facility, Option To Increase Maximum Borrowing Capacity Margin Debt Instrument, Basis Spread on Variable Rate Line of credit facility, unused capacity, commitment fee percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Borrowings from credit facility Proceeds from Lines of Credit Credit facility Long-term Line of Credit Outstanding amount Letters of Credit Outstanding, Amount Available borrowing capacity Line of Credit Facility, Current Borrowing Capacity Debt issuance cost Debt Issuance Costs, Line of Credit Arrangements, Gross Credit facility term remaining Line of Credit Facility, Remaining Term Line of Credit Facility, Remaining Term Amortization of debt issuance costs Amortization of Debt Issuance Costs Schedule of Revenue by Geographic Area Revenue from External Customers by Geographic Areas [Table Text Block] Jurisdiction Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest [Abstract] Domestic Income (Loss) from Continuing Operations before Income Taxes, Domestic Foreign Income (Loss) from Continuing Operations before Income Taxes, Foreign Investment Holdings [Table] Investment Holdings [Table] Cash Cash [Member] Cash, Cash Equivalents and Investments Investment Holdings [Line Items] Total cash and cash equivalents Total short-term investments Total long-term investments Cash, cash equivalents and investments Cash, Cash Equivalents and Investments. Represents the amount of cash and cash equivalents and investments as of the balance sheet date. Redeemable Convertible Preferred Stock Stockholders' Equity Note Disclosure [Text Block] Provision for Income Taxes Income Tax Disclosure [Text Block] Other Series of Individually Immaterial Business Acquisitions [Member] Developed technology Technology-Based Intangible Assets [Member] Tradename Estimated fair value Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Estimated useful life in years Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Tangible assets acquired, net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Deferred tax liability Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent Net assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Total Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Loss before benefit from (provision for) income taxes Accounts receivable, allowance Redeemable convertible preferred stock, par value (usd per share) Temporary Equity, Par Value Redeemable convertible preferred stock, shares authorized Temporary Equity, Shares Authorized Redeemable convertible preferred stock, shares issued Temporary Equity, Shares Issued Redeemable convertible preferred stock, shares outstanding Temporary Equity, Shares Outstanding Redeemable convertible preferred stock, liquidation preference Temporary Equity, Liquidation Preference Per Share Common stock, par value (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, Issued Common stock, shares outstanding Common Stock, Shares, Outstanding Accounting Policies [Abstract] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Consolidation Consolidation, Policy [Policy Text Block] Change in Presentation Comparability of Prior Year Financial Data, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Revenue Recognition Revenue Recognition, Policy [Policy Text Block] Concentration of Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Cash, Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Investments Investment, Policy [Policy Text Block] Accounts Receivable and Allowance for Doubtful Accounts Trade and Other Accounts Receivable, Policy [Policy Text Block] Property and Equipment, net Property, Plant and Equipment, Policy [Policy Text Block] Prepaid Content Acquisition Costs Prepaid Content Acquisition Costs, Policy [Policy Text Block] Capitalized Internal-Use Software Internal Use Software, Policy [Policy Text Block] Business Combinations Business Combinations Policy [Policy Text Block] Goodwill and Intangible Assets, net Goodwill and Intangible Assets, Policy [Policy Text Block] Stock-Based Compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Cost of Revenue Cost of Sales, Policy [Policy Text Block] Product Development Research and Development Expense, Policy [Policy Text Block] Sales and Marketing, and General and Administrative Selling, General and Administrative Expenses, Policy [Policy Text Block] Provision for (Benefit from) Income Taxes Income Tax, Policy [Policy Text Block] Net Loss per Common Share Earnings Per Share, Policy [Policy Text Block] Recently Issued Accounting Standards and Recently Adopted Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Commitments and Contingencies Commitments and Contingencies, Policy [Policy Text Block] Schedule of changes in the carrying amount of goodwill Schedule of Goodwill [Table Text Block] Summary of gross carrying amounts and accumulated amortization of intangibles - finite lived Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block] Summary of gross carrying amounts and accumulated amortization of intangibles - indefinite lived Schedule of Acquired Indefinite-lived Intangible Assets by Major Class [Table Text Block] Schedule of future amortization expense related to finite-lived intangible assets Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Schedule of carrying amounts of major classes of assets and liabilities and loss before income taxes Disposal Groups, Including Discontinued Operations [Table Text Block] Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current [Abstract] Other current assets Other Assets, Current Prepaid expenses Prepaid Expense, Current Ticketing contract advances—short term, net Prepaid Contract Expense, Current Prepaid Contract Expense, Current Total prepaid expenses and other current assets Schedule of Goodwill [Table] Schedule of Goodwill [Table] Goodwill [Line Items] Goodwill [Line Items] Asset Impairment Charges Amortization expense of intangible assets Amortization of Intangible Assets Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] 2018 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Five Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five Composition of Certain Financial Statement Captions Additional Financial Information Disclosure [Text Block] Document and Entity Information [Abstract] Document and Entity Information [Abstract] 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 Current Reporting Status Entity Current Reporting Status Entity Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Voluntary Filers Entity Voluntary Filers Entity Well Known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Public Float Entity Public Float Dispositions Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] Current Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Current Federal Tax Expense (Benefit) State and local Current State and Local Tax Expense (Benefit) International Current Foreign Tax Expense (Benefit) Total current income tax expense Current Income Tax Expense (Benefit) Deferred Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Deferred Federal Income Tax Expense (Benefit) State and local Deferred State and Local Income Tax Expense (Benefit) International Deferred Foreign Income Tax Expense (Benefit) Valuation allowance Deferred Income Tax Expense (Benefit) Valuation Allowance Represents the component of income tax expense for the period representing the valuation allowance in the entity's deferred tax assets and liabilities pertaining to continuing operations. Total deferred income tax expense (benefit) Deferred Income Tax Expense (Benefit) Total provision for (benefit from) income taxes Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Receivable Type [Axis] Receivable Type [Axis] Receivable [Domain] Receivable [Domain] Convertible promissory note Notes Receivable [Member] Convertible promissory note Convertible Subordinated Debt [Member] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Note term Notes Issued, Term Notes Issued, Term Stated interest rate Receivable, Interest Rate, Stated Percentage Receivable, Interest Rate, Stated Percentage Unamortized discount Receivable with Imputed Interest, Purchase Price Adjustments Receivable with Imputed Interest, Purchase Price Adjustments Receivable with Imputed Interest, Purchase Price Adjustments Interest receivable Interest Receivable Amortization of discount Receivables with Imputed Interest, Amortization Amount Business Combinations Business Combination Disclosure [Text Block] 1.75% convertible senior notes due 2020 Long-term Debt, Gross Unamortized discount and deferred issuance costs Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Long-term debt, net Quarterly Financial Information Disclosure [Abstract] Schedule of selected quarterly financial data (unaudited) Quarterly Financial Information [Table Text Block] Valuation Technique [Axis] Valuation Technique [Axis] Valuation Technique [Domain] Valuation Technique [Domain] Black-Scholes option pricing model Black Scholes Options Pricing Model [Member] Represents information pertaining to the Black-Scholes options pricing model, a valuation method used in the computation of fair value of stock options. Expected term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 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 dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Schedule of interest rates and amortization discount Schedule Of Interest Rates And Amortization Discount [Table Text Block] Schedule Of Interest Rates And Amortization Discount [Table Text Block] Schedule of long-term debt Schedule of Long-term Debt Instruments [Table Text Block] Summary of the effective interest rate, contractually stated interest expense and costs related to amortization of discount for the Notes Convertible Debt [Table Text Block] Effective interest rate Debt Instrument, Interest Rate, Effective Percentage Contractually stated interest expense Interest Expense, Debt, Excluding Amortization Amortization of discount Amortization of Debt Discount (Premium) Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] General and administrative General and Administrative Expense [Member] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Accelerated awards in connection with executive severance Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost Actual credit losses New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] ASU 2016-09 Accounting Standards Update 2016-09 [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Additional Paid-in Capital Additional Paid-in Capital [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Net deferred tax asset Deferred Tax Assets, Net Cumulative effect adjustment from adoption of ASU 2016-09 Cumulative Effect of New Accounting Principle in Period of Adoption Concentration Risk [Table] Concentration Risk [Table] Internal use software and website development RSUs Restricted Stock Units (RSUs) [Member] PSUs Performance Shares [Member] Concentration Risk [Line Items] Concentration Risk [Line Items] Estimated useful lives of assets (years) Capitalized cost, net of amortization, related to internal use software and website development costs Impairment of goodwill Content acquisition cost percent Royalty Pool, Content Acquisition Costs, Percent Royalty Pool, Content Acquisition Costs, Percent Finite-lived intangible asset, useful life (years) Finite-Lived Intangible Asset, Useful Life Service period over which company recognizes stock-based compensation (years) Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period Advertising expenses Advertising Expense Service period over which company recognizes stock-based compensation (years) Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Other current liabilities Other Liabilities, Current [Abstract] Ticketing amounts due to clients Due To Vendor, Current Due To Vendor, Current Other Other Sundry Liabilities, Current Total other current liabilities Temporary Equity, by Class of Stock [Table] Temporary Equity, by Class of Stock [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Series A convertible preferred stock Series A Preferred Stock [Member] Temporary Equity [Line Items] Temporary Equity [Line Items] Series A redeemable convertible preferred stock Temporary Equity, Stock Issued During Period, Value, New Issues Issuance costs Payments of Stock Issuance Costs Accretion of issuance costs Accretion Expense Stock dividend payable to preferred stockholders Dividends Payable Redeemable convertible preferred stock Temporary Equity, Carrying Amount, Attributable to Parent Risk-free interest rate, minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum Risk-free interest rate, maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Expected volatility, minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Expected volatility, maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum Description of Business and Basis of Presentation Business Description and Basis of Presentation [Text Block] Adjusted Cost Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] Due in one year or less Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis Due after one year through three years Available For Sale Securities, Debt Maturities after One through Three Years, Amortized Cost Represents the amount of available-for-sale debt securities at cost, net of adjustments, maturing in the second fiscal year through the three fiscal years following the latest fiscal year. Total Available-for-sale Debt Securities, Amortized Cost Basis Fair Value Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] Due in one year or less Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Due after one year through three years Available For Sale Securities, Debt Maturities after One through Three Years, Fair Value Represents the amount of available-for-sale debt securities at fair value maturing in the second fiscal year through the three fiscal years following the latest fiscal year. Total Available-for-sale Securities, Debt Securities Cost of revenue—Other Cost of Sales [Member] Cost of revenue—Ticketing service Service And Processing Costs [Member] Service And Processing Costs [Member] Product development Research and Development Expense [Member] Sales and marketing Selling and Marketing Expense [Member] Total stock-based compensation expense Allocated Share-based Compensation Expense Stock-based compensation expense Compensation cost not yet recognized Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Unrecognized compensation cost Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options Weighted-average fair value of stock option granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Aggregate intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Total fair value of options vested Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value ESPP Employee Stock Purchase Plan [Member] Employee Stock Purchase Plan [Member] Amounts withheld in contributions from employees Share Based Compensation Arrangement by Share Based Payment Award Contribution from Employees Withheld Represents the amount of contributions from employees withheld. ESPP shares issued (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Weighted average purchase price (in dollars per share) Shares Issued, Price Per Share Sale of Stock [Axis] Sale of Stock [Axis] Sale of Stock [Domain] Sale of Stock [Domain] Initial closing Initial Closing [Member] Initial Closing [Member] Second closing Closing Upon Certain Regulatory Approvals [Member] Closing Upon Certain Regulatory Approvals [Member] Agreement to sell shares (in shares) Temporary Equity, Share Subscriptions Agreement to sell shares Temporary Equity, Shares Subscribed but Unissued, Subscriptions Receivable Payments of Stock Issuance Costs Proceeds from issuance of redeemable convertible preferred stock Proceeds from Issuance of Convertible Preferred Stock Shares conversion per share Convertible Preferred Stock, Shares Issued upon Conversion Conversion price (in dollars per share) Preferred Stock, Initial Conversion Price Per Share Preferred Stock, Initial Conversion Price Per Share Quarterly dividend rate, percentage Preferred Stock, Dividend Rate, Percentage Redemption percentage Convertible Preferred Stock, Conversion Redemption, Holder Right, Percent Convertible Preferred Stock, Conversion Redemption, Holder Right, Percent Contract termination fee and related legal and professional fees Level 3 Fair Value, Inputs, Level 3 [Member] Assets measured at fair value Assets, Fair Value Disclosure, Recurring Liabilities measured at fair value Liabilities, Fair Value Disclosure, Recurring Cost of revenue Cost of revenue—Other Cost of revenue—Ticketing service Service And Processing Costs Service And Processing Costs Operating expenses Net loss Servers, computers and other related equipment Computer Equipment [Member] Leasehold improvements Leasehold Improvements [Member] Construction in progress Construction in Progress [Member] Office furniture and equipment Furniture and Fixtures [Member] Property and equipment, net Property, Plant and Equipment, Net [Abstract] Total property and equipment Property, Plant and Equipment, Gross Less accumulated depreciation and amortization Total property and equipment, net Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] Available-for-sale securities, continuous unrealized loss position, twelve months or less, fair value Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Available-for-sale securities, continuous unrealized loss position, twelve months or less, gross unrealized losses Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Available-for-sale securities, continuous unrealized loss position, more than twelve months, fair value Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Available-for-sale securities, continuous unrealized loss position, more than twelve months, gross unrealized losses Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Available-for-sale securities, continuous unrealized loss position, total, fair value Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Available-for-sale securities, continuous unrealized loss position, total, gross unrealized losses Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss Stock-based Compensation Plans and Awards Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Employee severance and benefits costs Subsequent Event Subsequent Event [Line Items] Reduction in force Restructuring And Related Cost, Expected Number Of Positions Eliminated, Percent Restructuring And Related Cost, Expected Number Of Positions Eliminated, Percent Expected total reduction in force costs Effect on Future Earnings, Amount Selected Quarterly Financial Data (unaudited) Quarterly Financial Information [Text Block] Equity Awards Equity Awards [Member] Equity Awards [Member] Restricted stock units Restricted Stock [Member] Performance stock units MSUs and PSUs Market Stock Units and Performance Stock Units [Member] Market Stock Units and Performance Stock Units [Member] Shares Available for Grant Share Based Compensation Arrangement by Share Based Payment Award, Number of Shares Available for Grant [Roll Forward] Represents share-based compensation arrangement by Share-based Payment award, options, number of share available for grant. Beginning balance (in shares) Additional shares authorized (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized Units granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period ESPP shares issued (in shares) Options forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Number of Shares Options expired (in shares) Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Ending balance (in shares) Fair Value Fair Value Disclosures [Text Block] Statement of Cash Flows [Abstract] Operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Adjustments to reconcile net loss to net cash used in operating activities Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Loss on sales of subsidiaries Depreciation and amortization Depreciation, Depletion and Amortization Stock-based compensation Share-based Compensation Amortization of premium on investments, net Amortization Of Premium On Investments, Net Amortization Of Premium On Investments, Net Accretion of discount on convertible promissory note receivable Accretion Of Discount On Convertible Promissory Note Receivable Accretion Of Discount On Convertible Promissory Note Receivable Other operating activities Other Operating Activities, Cash Flow Statement Amortization of debt discount Amortization of Debt Issuance Costs and Discounts Interest income Interest Income, Operating Provision for bad debt Provision for Doubtful Accounts Changes in restricted cash Increase (Decrease) in Restricted Cash for Operating Activities Changes in assets and liabilities Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Prepaid content acquisition costs Increase (Decrease) in Prepaid Royalties Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Accounts payable, accrued and other current liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Accrued content acquisition costs Increase (Decrease) in Royalties Payable Accrued compensation Increase (Decrease) in Employee Related Liabilities Other long-term liabilities Increase (Decrease) in Other Noncurrent Liabilities Deferred revenue Increase (Decrease) in Deferred Revenue Reimbursement of cost of leasehold improvements Payments for (Proceeds from) Tenant Allowance Net cash used in operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations Investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Internal-use software costs Payments to Develop Software Changes in restricted cash Increase (Decrease) in Restricted Cash Purchases of investments Payments to Acquire Investments Proceeds from maturities of investments Proceeds from Sale, Maturity and Collection of Investments Proceeds from sales of investments Proceeds from Sale of Available-for-sale Securities Payments related to acquisitions, net of cash acquired Net cash (used in) provided by investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations Financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Payments of issuance costs Payments of Debt Issuance Costs Proceeds from issuance of convertible notes Proceeds from Convertible Debt Payments for purchase of capped call Repayments of Convertible Debt Repayment of debt arrangements Repayments of Long-term Lines of Credit Borrowings under debt arrangements Proceeds from Long-term Lines of Credit Proceeds from employee stock purchase plan Proceeds from Stock Plans Proceeds from exercise of stock options Proceeds from Stock Options Exercised Tax payments from net share settlements of restricted stock units Payments Related to Tax Withholding for Share-based Compensation Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash and Cash Equivalents Net increase (decrease) in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Supplemental disclosures of cash flow information Supplemental Cash Flow Information [Abstract] Cash paid during the period for income taxes Income Taxes Paid, Net Cash paid during the period for interest Interest Paid Purchases of property and equipment recorded in accounts payable and accrued liabilities Capital Expenditures Incurred but Not yet Paid Fair value of shares issued related to the acquisition of a business Other Significant Noncash Transaction, Value of Consideration Given Accretion of preferred stock issuance costs Stock dividend payable to preferred stockholders Dividends, Preferred Stock Fair value of convertible promissory note receivable received as partial consideration for sale of subsidiary Notes Issued Effective interest rate Receivable with Imputed Interest, Effective Yield (Interest Rate) Contractually stated interest income Interest Income, Contractual Amount Interest Income, Contractual Amount MSUs Market Stock Units (MSUs) [Member] Market Stock Units (MSUs) [Member] Number Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Unvested at the beginning of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (in shares) Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited (in shares) Unvested at the end of the period (in shares) Expected to vest at end of the period (in shares) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Expected To Vest, Outstanding, Number Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Expected To Vest, Outstanding, Number 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] Unvested at the beginning of the period (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) 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 Unvested at the end of the period (in dollars per share) Expected to vest at end of the period (in dollars per share) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Expected To Vest, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Expected To Vest, Weighted Average Grant Date Fair Value Segment Data and Revenue by Geographic Area Segment Reporting Disclosure [Text Block] Vesting [Axis] Vesting [Axis]