Summary of Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2020
Accounting Policies [Abstract]
Basis of Presentation and Consolidation	Basis of Presentation and Consolidation The accompanying Condensed Consolidated Financial Statements include the accounts of the Company and its wholly-owned domestic and foreign subsidiaries. All intercompany transactions and balances are eliminated upon consolidation.
Reclassification	Reclassification Certain amounts in the prior year financial statements have been reclassified to conform to the current quarter presentation. Specifically, current accrued litigation settlements have been aggregated within other current liabilities on the Condensed Consolidated Balance Sheets.
Use of Estimates and Judgments in the Preparation of the Condensed Consolidated Financial Statements	Use of Estimates and Judgments in the Preparation of the Condensed Consolidated Financial Statements The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the reported amounts of revenue and expense during the reporting periods. Significant estimates and judgments are inherent in the analysis and the measurement of management's standalone selling price, principal versus agent revenue recognition, determination of performance obligations, determination of transaction price, including the determination of variable consideration and allocation of transaction price to performance obligations, deferred tax assets and liabilities, including the identification and quantification of income tax liabilities due to uncertain tax positions, the valuation and recoverability of goodwill, intangible and other long-lived assets, the determination of appropriate discount rates for lease accounting, the probability of exercising either lease renewal or termination clauses, the assessment of potential loss from contingencies, the fair value determination of financing derivative liabilities and warrants, the allowance for doubtful accounts, valuation of options and performance-based and market-based stock awards. Management bases its estimates and assumptions on historical experience and on various other factors that are believed to be reasonable under the circumstances. For the three months ended March 31, 2020, management specifically considered the impact of the COVID-19 pandemic and related matters in evaluating the Company's goodwill, intangible and other long-lived assets, lease accounting, contingencies, fair value determinations and allowance for doubtful accounts. Due to the inherent uncertainty involved in making estimates, particularly in the current environment, actual results reported in future periods may be affected by changes in those estimates. The Company evaluates its estimates and assumptions on an ongoing basis.
Loss Per Share	Loss Per Share Basic net loss per common share excludes dilution for potential Common Stock issuances and is computed by dividing net loss by the weighted-average number of shares of Common Stock outstanding for the period. 250,000 shares of Common Stock issuable upon the exercise of warrants held by Starboard ("penny warrants") were included in the number of outstanding shares used for the computation of basic net loss per share prior to the exercise of those warrants on April 3, 2019. In periods where the Company reports a net loss, the effect of anti-dilutive stock options, stock appreciation rights, restricted stock units, deferred stock units, senior secured convertible notes and warrants are excluded and diluted net loss per share is equal to basic loss per share.
Impairment of Right-of-Use and Long-Lived Assets	Impairment of Right-of-use ("ROU") and Long-lived Assets The Company applies the provisions of Accounting Standards Codification ("ASC") 360, Property, Plant and Equipment, to determine whether ROU and related long-lived assets may be impaired. The Company evaluates its ROU and long-lived assets for impairment whenever events or changes in circumstances indicate the carrying value of such assets may not be recoverable. For facility lease ROU and related long-lived assets, the Company compares the estimated undiscounted cash flows generated by a sublease to the current carrying value of the ROU and related long-lived assets. If the undiscounted cash flows are less than the carrying value of the ROU and related long-lived assets, the Company records an impairment loss equal to the excess of the ROU and long-lived assets' carrying value over their fair value consistent with other long-lived assets. The Company performed an interim analysis as of March 31, 2020, as changes in market conditions indicated the carrying value of certain facility lease ROU and other long-lived assets may not be recoverable, and determined that certain ROU assets, and related leasehold improvements, were impaired. The Company recorded a $4.7 million non-cash impairment charge related to its ROU assets, and related leasehold improvements, for the three months ended March 31, 2020, with corresponding reductions of $2.8 million and $1.9 million to the operating lease ROU asset and property and equipment, net line items, respectively, in the Condensed Consolidated Balance Sheet as of March 31, 2020. The impairment charge was driven by changes in the Company's projected undiscounted cash flows for certain properties, primarily as a result of changes in the real estate market related to the COVID-19 pandemic, that led to an increase in the estimated marketing time, and a reduction of expected receipts, for properties currently on the market for sublease. The fair value of these ROU assets, and related leasehold improvements, was estimated using an income approach and a discount rate of 12.0%. After recognition of the impairment charge, the adjusted carrying values of the ROU assets, and related leasehold improvements, were $2.0 million and $0.5 million, respectively, as of March 31, 2020. Although the Company believes that the carrying values of its long-lived assets are appropriately stated, future changes in strategy or market conditions, significant technological developments or significant changes in legal or regulatory factors could significantly impact these judgments and require adjustments to recorded asset balances.
Allowance for Doubtful Accounts	Allowance for Doubtful Accounts The Company generally grants uncollateralized credit terms to its customers and maintains an allowance for doubtful accounts to reserve for uncollectible receivables. Allowances are based on management's judgment, which considers historical collection experience adjusted for current conditions or expected future conditions based on reasonable and supportable forecasts, a specific review of all significant outstanding receivables, an assessment of company-specific credit conditions and general economic conditions.
Accounting Standards Recently Adopted and Recently Issued Accounting Pronouncements	Accounting Standards Recently Adopted In June 2016, the Financial Accounting Standards Board ("FASB") issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326), which requires the measurement and recognition of expected credit losses for financial assets held at amortized cost. ASU 2016-13 replaces the existing incurred loss impairment model with an expected loss model which requires consideration of forward-looking information to calculate credit loss estimates. These changes will result in an earlier recognition of credit losses. The amendment is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company adopted the new standard effective January 1, 2020, and the standard did not have a material impact on the Condensed Consolidated Financial Statements or related disclosures based on historical collection trends, the financial condition of payment partners, and external market factors. In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820), which removes and modifies certain disclosure requirements under Topic 820. The amendments are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. An entity is permitted to early adopt any removed or modified disclosures upon issuance of the update and to delay adoption of the additional disclosures until their effective date. The Company adopted the new standard effective January 1, 2020 and the standard did not have a material impact on the Condensed Consolidated Financial Statements or related disclosures. Recently Issued Accounting Pronouncements In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740), which simplifies the accounting for income taxes primarily by eliminating certain exemptions. The amendments are effective for fiscal years beginning after December 15, 2020, including interim periods within those fiscal years. An entity is permitted to early adopt any removed or modified disclosures upon issuance of the update and to delay adoption of the additional disclosures until their effective date. The Company is in the process of evaluating the guidance but does not believe that the adoption of this standard will have a material impact on the Condensed Consolidated Financial Statements or related disclosures.
Fair Value Measurements	The primary sensitivity in the interest rate reset derivative liability is driven by the Common Stock price at the measurement date, the observable volatility of the Common Stock, and the discount rate used to determine the present value of the instrument. The primary sensitivity for the make-whole and qualifying change of control redemption derivative liabilities is driven by the probability of the change of control. The primary sensitivity in the valuation of each warrant liability is driven by the Common Stock price at the measurement date and the observable volatility of the Common Stock.

Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2020

The accompanying Condensed Consolidated Financial Statements include the accounts of the Company and its wholly-owned domestic and foreign subsidiaries. All intercompany transactions and balances are eliminated upon consolidation.

Reclassification

Certain amounts in the prior year financial statements have been reclassified to conform to the current quarter presentation. Specifically, current accrued litigation settlements have been aggregated within other current liabilities on the Condensed Consolidated Balance Sheets.

Use of Estimates and Judgments in the Preparation of the Condensed Consolidated Financial Statements

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the reported amounts of revenue and expense during the reporting periods. Significant estimates and judgments are inherent in the analysis and the measurement of management's standalone selling price, principal versus agent revenue recognition, determination of performance obligations, determination of transaction price, including the determination of variable consideration and allocation of transaction price to performance obligations, deferred tax assets and liabilities, including the identification and quantification of income tax liabilities due to uncertain tax positions, the valuation and recoverability of goodwill, intangible and other long-lived assets, the determination of appropriate discount rates for lease accounting, the probability of exercising either lease renewal or termination clauses, the assessment of potential loss from contingencies, the fair value determination of financing derivative liabilities and warrants, the allowance for doubtful accounts, valuation of options and performance-based and market-based stock awards. Management bases its estimates and assumptions on historical experience and on various other factors that are believed to be reasonable under the circumstances. For the three months ended March 31, 2020, management specifically considered the impact of the COVID-19 pandemic and related matters in evaluating the Company's goodwill, intangible and other long-lived assets, lease accounting, contingencies, fair value determinations and allowance for doubtful accounts.

Due to the inherent uncertainty involved in making estimates, particularly in the current environment, actual results reported in future periods may be affected by changes in those estimates. The Company evaluates its estimates and assumptions on an ongoing basis.

Loss Per Share

Basic net loss per common share excludes dilution for potential Common Stock issuances and is computed by dividing net loss by the weighted-average number of shares of Common Stock outstanding for the period. 250,000 shares of Common Stock issuable upon the exercise of warrants held by Starboard ("penny warrants") were included in the number of outstanding shares used for the computation of basic net loss per share prior to the exercise of those warrants on April 3, 2019. In periods where the Company reports a net loss, the effect of anti-dilutive stock options, stock appreciation rights, restricted stock units, deferred stock units, senior secured convertible notes and warrants are excluded and diluted net loss per share is equal to basic loss per share.

Impairment of Right-of-Use and Long-Lived Assets

Impairment of Right-of-use ("ROU") and Long-lived Assets

The Company applies the provisions of Accounting Standards Codification ("ASC") 360, Property, Plant and Equipment, to determine whether ROU and related long-lived assets may be impaired. The Company evaluates its ROU and long-lived assets for impairment whenever events or changes in circumstances indicate the carrying value of such assets may not be recoverable. For facility lease ROU and related long-lived assets, the Company compares the estimated undiscounted cash flows generated by a sublease to the current carrying value of the ROU and related long-lived assets. If the undiscounted cash flows are less than the carrying value of the ROU and related long-lived assets, the Company records an impairment loss equal to the excess of the ROU and long-lived assets' carrying value over their fair value consistent with other long-lived assets.

The Company performed an interim analysis as of March 31, 2020, as changes in market conditions indicated the carrying value of certain facility lease ROU and other long-lived assets may not be recoverable, and determined that certain ROU assets, and related leasehold improvements, were impaired.

The Company recorded a $4.7 million non-cash impairment charge related to its ROU assets, and related leasehold improvements, for the three months ended March 31, 2020, with corresponding reductions of $2.8 million and $1.9 million to the operating lease ROU asset and property and equipment, net line items, respectively, in the Condensed Consolidated Balance Sheet as of March 31, 2020. The impairment charge was driven by changes in the Company's projected undiscounted cash flows for certain properties, primarily as a result of changes in the real estate market related to the COVID-19 pandemic, that led to an increase in the estimated marketing time, and a reduction of expected receipts, for properties currently on the market for sublease. The fair value of these ROU assets, and related leasehold improvements, was estimated using an income approach and a discount rate of 12.0%. After recognition of the impairment charge, the adjusted carrying values of the ROU assets, and related leasehold improvements, were $2.0 million and $0.5 million, respectively, as of March 31, 2020.

Although the Company believes that the carrying values of its long-lived assets are appropriately stated, future changes in strategy or market conditions, significant technological developments or significant changes in legal or regulatory factors could significantly impact these judgments and require adjustments to recorded asset balances.

Allowance for Doubtful Accounts

The Company generally grants uncollateralized credit terms to its customers and maintains an allowance for doubtful accounts to reserve for uncollectible receivables. Allowances are based on management's judgment, which considers historical collection experience adjusted for current conditions or expected future conditions based on reasonable and supportable forecasts, a specific review of all significant outstanding receivables, an assessment of company-specific credit conditions and general economic conditions.

Accounting Standards Recently Adopted and Recently Issued Accounting Pronouncements

Accounting Standards Recently Adopted

In June 2016, the Financial Accounting Standards Board ("FASB") issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326), which requires the measurement and recognition of expected credit losses for financial assets held at amortized cost. ASU 2016-13 replaces the existing incurred loss impairment model with an expected loss model which requires consideration of forward-looking information to calculate credit loss estimates. These changes will result in an earlier recognition of credit losses. The amendment is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company adopted the new standard effective January 1, 2020, and the standard did not have a material impact on the Condensed Consolidated Financial Statements or related disclosures based on historical collection trends, the financial condition of payment partners, and external market factors.

In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820), which removes and modifies certain disclosure requirements under Topic 820. The amendments are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. An entity is permitted to early adopt any removed or modified disclosures upon issuance of the update and to delay adoption of the additional disclosures until their effective date. The Company adopted the new standard effective January 1, 2020 and the standard did not have a material impact on the Condensed Consolidated Financial Statements or related disclosures.

Recently Issued Accounting Pronouncements

In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740), which simplifies the accounting for income taxes primarily by eliminating certain exemptions. The amendments are effective for fiscal years beginning after December 15, 2020, including interim periods within those fiscal years. An entity is permitted to early adopt any removed or modified disclosures upon issuance of the update and to delay adoption of the additional disclosures until their effective date. The Company is in the process of evaluating the guidance but does not believe that the adoption of this standard will have a material impact on the Condensed Consolidated Financial Statements or related disclosures.

Fair Value Measurements

The primary sensitivity in the interest rate reset derivative liability is driven by the Common Stock price at the measurement date, the observable volatility of the Common Stock, and the discount rate used to determine the present value of the instrument. The primary sensitivity for the make-whole and qualifying change of control redemption derivative liabilities is driven by the probability of the change of control.

The primary sensitivity in the valuation of each warrant liability is driven by the Common Stock price at the measurement date and the observable volatility of the Common Stock.