Income Taxes - Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Federal tax at statutory rate	$ 28,084	$ 1,271	$ (1,039)
State income taxes, net of federal tax benefit	(248)	369	74
Fair value adjustment on warrants	0	2,371	(253)
Stock-based compensation	(236,726)	(1,476)	411
Research and development credit	(19,103)	(1,231)	(372)
PPP loan forgiveness (CARES Act)	1,110	(1,110)	0
Change in valuation allowance	222,230	273	(844)
Tax return to tax provision adjustment	(34)	(216)	1,028
Section 162(m) limitation	2,653	0	0
Noncontrolling interests	0	85	956
Other	322	35	113
Provision (benefit) for income taxes	$ (1,712)	$ 371	$ 74

Effective Income Tax Rate Reconciliation, CARES ACT, PPP Loan Forgiveness, Amount

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Effective Income Tax Rate Reconciliation, Fair Value Adjustment of Warrants, Amounts

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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 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 noncontrolling interest income (loss) exempt from income taxes.

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