Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Tax benefit at federal statutory rate	$ (23,267)	$ (3,777)	$ (15,115)
State taxes, net of federal benefits	(3,498)	(364)	(2,690)
Stock-based compensation	2,018	698	1,471
Warrants	(1,710)	(403)	0
Non-deductible officers' compensation	8,352	0	0
Change in valuation allowance	15,971	3,948	16,560
Other, net	(1,002)	25	(136)
Total (benefit) provision for income taxes	$ (3,136)	$ 127	$ 90

Effective Income Tax Rate Reconciliation, Nondeductible Expense, Officer Compensation, Amount

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Effective Income Tax Rate Reconciliation, Nondeductible Expense, Warrant, Amount

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for award under share-based payment arrangement. Includes, but is not limited to, expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

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