Income Taxes - Reconciliation of Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Reconciliation of Provision (Benefit) for Income Taxes [Abstract]
Tax provision at expected statutory rate	$ 3,939	$ 274
State taxes, net of federal benefit	448	31
Permanent differences	(271)	45
Tax credits	(116)	(125)
Tax credit expiration	0	132
Foreign tax expense, and other	(7)	1
Change in rate	0	(38)
Change in valuation allowance	(379)	(9)
Change in uncertain tax positions	458	0
Provision to return	13	15
Other	33	10
Income tax provision	$ 4,118	$ 336
Effective tax rate	22.00%	25.80%