Income Taxes - Reconciliation of Effective Tax Rate (Details)	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
U.S. federal taxes at statutory rate	21.00%	21.00%	21.00%
State taxes (net of federal benefit)	1050.00%	2.10%	3.50%
Research and development tax credits	70.00%	0.60%	3.40%
Non-deductible stock-based compensation	1130.00%	(7.80%)	(3.30%)
162(m) Limitation	5.7	0	0
Permanent Items	20.00%	0.00%	50.00%
Unrealized fair market value gain on warrants	1700.00%	0.00%	0.00%
Change in valuation allowance	3200.00%	(15.90%)	(24.10%)
Effective tax rate	0.00%	0.00%	0.00%

Effective Income Tax Rate Reconciliation, Nondeductible Expense, Pay For Covered Employees Limitation, Percent

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Effective Income Tax Rate Reconciliation Unrealized Fair Market Value Gain On Warrants

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

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-Publisher FASB
-Name Accounting Standards Codification
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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage 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 changes in the valuation allowance for deferred tax assets.

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Percentage 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 applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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