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Arrangement by Share-Based Payment Award, Number of Shares Authorized Software Development Software Development [Member] Termination Date Trading Arrangement Termination Date Net cash provided by (used in) financing activities Net cash provided by (used in) financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Measure: Measure [Axis] Long-Lived Tangible Asset [Domain] Long-Lived Tangible Asset [Domain] Basic (in shares) Weighted-average shares of common stock used to compute net loss per share, basic (in shares) Weighted Average Number of Shares Outstanding, Basic Share repurchase program, remaining authorized, amount Share Repurchase Program, Remaining Authorized, Amount Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Schedule of Computation of Basic and Diluted Net Loss Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Subsequent Events [Abstract] Segment Reporting [Abstract] Cost of revenue, net Cost of Revenue Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Schedule of RSU Rollforward Schedule of Unvested Restricted Stock Units Roll Forward [Table Text Block] Amortization of debt issuance costs Amortization of Debt Issuance Costs Entity Tax Identification Number Entity Tax Identification Number Beginning balance (in dollars per share) Ending balance (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Estimated putative class action liability Estimated Litigation Liability, Current Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Share-based Compensation Arrangement by Share-based Payment Award Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Consolidated Entities [Axis] Consolidated Entities [Axis] Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Matching Plan shares Matching Plan [Member] Matching Plan Common stock, shares issued (in shares) Common Stock, Shares, Issued Income tax receivable Income Taxes Receivable, Current Options granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Use of Estimates Use of Estimates, Policy [Policy Text Block] Litigation settlement, amount awarded to other party Litigation Settlement, Amount Awarded to Other Party Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Loss Contingencies [Line Items] Loss Contingencies [Line Items] SUBSEQUENT EVENTS Subsequent Events [Text Block] Insider Trading Arrangements [Line Items] Name of each exchange on which registered Security Exchange Name Employer share match rate (percent) Share-Based Compensation Arrangement By Share-Based Payment Award, Percentage Of Shares Matched By Employer Share-Based Compensation Arrangement By Share-Based Payment Award, Percentage Of Shares Matched By Employer Other Product and Service, Other [Member] Total liabilities Liabilities Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Settlement liabilities Settlement Liabilities, Current Purchases of property and equipment and capitalized software in accounts payable and accrued expenses Capital Expenditures Incurred but Not yet Paid Capitalized software, net Capitalized software, net Capitalized Computer Software, Net Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Operating expenses: Operating Expenses [Abstract] Prepaid expenses Prepaid Expense, Current Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Lease liabilities, non-current Lease Liability, Non-Current Lease Liability, Non-Current Statement [Line Items] Statement [Line Items] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalent Counterparty Name [Axis] Counterparty Name [Axis] Additional shares authorized (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized Common stock Common Stock [Member] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Entity Incorporation, State Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] The 2009 Option Plan The 2009 Option Plan [Member] The 2009 Option Plan Net increase in cash and cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Professional fees Accrued Professional Fees, Current