Stock-Based Compensation - RSU (Details) - Restricted Stock Awards [Member] $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
Mar. 31, 2022 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation costs related to unvested stock options not yet recognized \| $	$ 4.3
Weighted-average period of amortization	1 year 4 months 24 days
Shares [Roll Forward]
Non-vested, beginning of period (in shares) \| shares	875
Granted (in shares) \| shares	2
Vested (in shares) \| shares	(9)
Forfeited (in shares) \| shares	(8)
Non-vested, end of period (in shares) \| shares	860
Weighted Average Grant Date Fair Value [Roll Forward]
Non-vested, beginning of period (in dollars per share) \| $ / shares	$ 6.26
Granted (in dollars per share) \| $ / shares	9.05
Vested (in dollars per share) \| $ / shares	11.60
Forfeited (in dollars per share) \| $ / shares	5.21
Non-vested, end of period (in dollars per share) \| $ / shares	$ 6.22

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for option under share-based payment arrangement.

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

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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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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The weighted average fair value at grant date for nonvested equity-based awards issued 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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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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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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