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Income Taxes - Significant Components of Company's Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Tax computed at the federal statutory rate	$ (5,941)	$ (4,054)
State tax, net of federal tax benefit	(233)	(122)
Permanent items	62	261
Stock based compensation	325	81
Tax credits	(366)	(300)
Other	72	0
Valuation allowance increase (decrease)	6,081	4,134
Provision for income taxes	$ 0	$ 0
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Tax computed at the federal statutory rate	21.00%	21.00%
State tax, net of federal tax benefit	1.00%	1.00%
Permanent items	0.00%	(1.00%)
Stock based compensation	(1.00%)	(1.00%)
Tax credits	1.00%	2.00%
Other	0.00%	0.00%
Valuation allowance increase (decrease)	(22.00%)	(22.00%)
Provision for income taxes	0.00%	0.00%

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