Stockholders' Deficit - Schedule of Restricted Stock Units (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
RSU Awards Outstanding [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Beginning balance, number of shares	7,061	1,240	1,040
Share-based compensation arrangement by share-based payment award, grants in period	12,977	6,153	200
Vested/Released, number of shares	(5,126)	(301)
Forfeited, number of shares	(1,328)	(31)
Ending balance, number of shares	13,584	7,061	1,240
Beginning balance, weighted average grant date fair value	$ 1.76	$ 3.56	$ 4.06
Granted, weighted average grant date fair value	1.05	1.39	2.18
Vested/Released, weighted average grant date fair value	1.57	1.78
Forfeited, weighted average grant date fair value	1.47	1.07
Ending balance, weighted average grant date fair value	$ 1.16	$ 1.76	$ 3.56
Beginning balance, aggregate intrinsic value	$ 8,544	$ 3,001	$ 3,962
Aggregate intrinsic value, vested/released	4,021	479
Ending balance, aggregate intrinsic value	$ 4,890	$ 8,544	$ 3,001
RSU Awards Vested and Not Settled [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Beginning balance, number of shares		150
Ending balance, number of shares	1,573		150
Beginning balance, weighted average grant date fair value		$ 4.06
Ending balance, weighted average grant date fair value	$ 2.11		$ 4.06
Beginning balance, aggregate intrinsic value		$ 363
Ending balance, aggregate intrinsic value	$ 566		$ 363

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

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-Name Accounting Standards Codification
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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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Intrinsic value of outstanding award under share-based payment arrangement. Excludes share and unit options.

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Intrinsic value of vested award under share-based payment arrangement. Excludes share and unit options.

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