Condensed Consolidated Statement of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Accumulated Deficit
Balance at beginning of period (in shares) at Dec. 31, 2020		8,305,269	0
Balance at beginning of period at Dec. 31, 2020	$ 116,572	$ 83	$ 0	$ 182,480	$ (65,991)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	1,049			1,049
Exercise of stock options (in shares)		20,362
Exercise of stock options	26			26
Stock issued upon vesting of restricted stock units (in shares)		9,939
Shares surrendered for tax withholding on vested awards (in shares)		(3,377)	3,377
Shares surrendered for tax withholding on vested awards	(44)		$ (44)
Net loss	(8,631)				(8,631)
Balance at end of period (in shares) at Mar. 31, 2021		8,332,193	3,377
Balance at end of period at Mar. 31, 2021	108,972	$ 83	$ (44)	183,555	(74,622)
Balance at beginning of period (in shares) at Dec. 31, 2021		8,357,391	9,428
Balance at beginning of period at Dec. 31, 2021	88,977	$ 83	$ (114)	185,429	(96,421)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	565			565
Stock issued upon vesting of restricted stock units (in shares)		1,702
Shares surrendered for tax withholding on vested awards (in shares)		(468)	468
Shares surrendered for tax withholding on vested awards	(5)		$ (5)
Net loss	(7,720)				(7,720)
Balance at end of period (in shares) at Mar. 31, 2022		8,358,625	9,896
Balance at end of period at Mar. 31, 2022	$ 81,817	$ 83	$ (119)	$ 185,994	$ (104,141)