Income Taxes - Reconciliation Between Income Tax Benefit and Expected Tax Benefit at Statutory Rate (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Federal statutory income tax rate	21.00%	21.00%
State income tax benefit—net of federal tax	6.00%	6.10%
Change in valuation allowance	(29.10%)	(29.10%)
Refundable tax credit	0.10%	0.10%
R&D tax credits	2.10%	2.00%
Effective income tax rate	0.10%	0.10%