Income Taxes - Effective Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Amount
Federal statutory income tax	$ (5,983)	$ (6,643)	$ (9,801)
State income tax, net of federal tax benefit	(1,024)	(1,056)	(1,577)
Foreign tax	(91)	(51)	(25)
Section 162(m) limitation	2,591	2,128	0
Other	516	489	328
Valuation allowance net of deferred tax assets	16,485	12,432	12,989
Stock-based compensation	(11,865)	(7,321)	(1,267)
Return to provision	(418)	149	(581)
Effective income tax rate	$ 211	$ 127	$ 66
Tax Rate
Federal statutory income tax	21.00%	21.00%	21.00%
State income tax, net of federal tax benefit	3.59%	3.34%	3.38%
Foreign tax	0.32%	0.16%	0.05%
Section 162(m) limitation	(9.09%)	(6.73%)	0.00%
Other	(1.72%)	(1.45%)	(0.72%)
Valuation allowance net of deferred tax assets	(57.86%)	(39.30%)	(27.83%)
Stock-based compensation	41.64%	23.14%	2.71%
Return to provision	1.47%	(0.47%)	1.25%
Effective income tax rate	(0.70%)	(0.30%)	(0.20%)