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- Definition

Prepaid Salaries

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- Definition

Share-Based Compensation Arrangement By Share-Based Payment Award, Additional Number Of Shares Authorized

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- Definition

Share-Based Compensation Arrangement By Share-Based Payment Award, Number Of Installments Over First Two Anniversaries

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- Definition

Carrying value as of the balance sheet date of the obligations incurred through that date and payable for employees' services provided.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Aggregate number of common shares reserved for future issuance.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

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Number of shares authorized for issuance under share-based payment arrangement.

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- Definition

Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Percentage of vesting of award under share-based payment arrangement.

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Equity Compensation Plans - Additional Information (Details)		3 Months Ended
	May 19, 2019 installment shares	Mar. 31, 2020 USD ($) shares	Mar. 31, 2019 USD ($) shares	Feb. 04, 2020 USD ($)	Dec. 31, 2019 shares	May 01, 2019 shares	Apr. 27, 2017 shares	May 02, 2014 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in Shares)		5,018,000			5,204,000
Number of options granted (in Shares)		85,000
Stock-based compensation expense \| $		$ 3,431,000	$ 4,720,000
Accrued salaries \| $				$ 39,400,000
Prepaid Expenses and Other Current Assets
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Prepaid salaries \| $		10,500,000
Accrued Compensation
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accrued salaries \| $		$ 6,500,000
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards granted (in Shares)		48,000
Number of units vested in period (in Shares)		196,000	300,000
Share-based compensation expense for awards vested \| $		$ 200,000	$ 1,000,000.0
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved for issuance (in Shares)		0
Other than options, outstanding (in Shares)		1,200,000
Number of awards granted (in Shares)		0
Number of units vested in period (in Shares)		0
Cash-Based Award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards granted (in Shares)	9,700,000
Award vesting period	2 years
Number of installments \| installment	2
Stock-based compensation expense \| $		$ 1,100,000	$ 0
Minimum \| Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		2 years
Maximum \| Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		4 years
Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in Shares)		3,600,000				12,400,000	8,000,000.0
Number of additional shares authorized (in shares)						4,400,000
Options outstanding (in Shares)		2,700,000
Award vesting period		4 years
Omnibus Plan \| Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other than options, outstanding (in Shares)		4,300,000
Omnibus Plan \| Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other than options, outstanding (in Shares)		900,000
2014 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved for issuance (in Shares)								7,500,000
Options outstanding (in Shares)		1,900,000
2014 Plan \| Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other than options, outstanding (in Shares)		31,266
Tranche One \| Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards granted (in Shares)		1,000,000.0
Award vesting period		2 years
Tranche One \| Minimum \| Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual award vesting percentage		25.00%
Tranche One \| Maximum \| Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual award vesting percentage		50.00%
Tranche One \| Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual award vesting percentage		25.00%
Tranche Two \| Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards granted (in Shares)		200,000
Award vesting period		4 years
Tranche Two \| Minimum \| Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual award vesting percentage		25.00%
Tranche Two \| Maximum \| Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual award vesting percentage		50.00%
Tranche Two \| Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual award vesting percentage		25.00%
Tranche Three \| Minimum \| Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual award vesting percentage		25.00%
Tranche Three \| Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual award vesting percentage		25.00%
Tranche Four \| Minimum \| Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual award vesting percentage		25.00%
Tranche Four \| Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual award vesting percentage		25.00%
Prospective Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options granted (in Shares)		400,000
Prospective Employee \| Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards granted (in Shares)		400,000
Prospective Employee \| Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards granted (in Shares)		200,000