CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Treasury Stock
Beginning balance at Dec. 31, 2020	$ 50,977	$ 383	$ 365,503	$ (20,215)	$ (293,998)	$ (696)
Beginning balance (in shares) at Dec. 31, 2020		38,179,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(3,330)				(3,330)
Share-based compensation expense	3,179		3,179
Issuance in connection with the exercise of stock options	366		366
Issuance in connection with the exercise of stock options (in shares)		29,000
Issuance of common stock upon vesting of restricted stock units	0	$ 4	(4)
Issuance of common stock upon vesting of restricted stock units (in shares)		365,000
Effect of shares withheld to cover taxes	(4,520)		(4,520)
Total other comprehensive income	2,572			2,572
Ending balance at Mar. 31, 2021	49,244	$ 387	364,524	(17,643)	(297,328)	(696)
Ending balance (in shares) at Mar. 31, 2021		38,573,000
Beginning balance at Dec. 31, 2021	$ 110,171	$ 389	373,644	(11,150)	(252,016)	(696)
Beginning balance (in shares) at Dec. 31, 2021	38,748,617	38,749,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ (7,977)				(7,977)
Share-based compensation expense	2,903		2,903
Issuance of common stock upon vesting of restricted stock units	0	$ 3	(3)
Issuance of common stock upon vesting of restricted stock units (in shares)		324,000
Effect of shares withheld to cover taxes	(3,452)		(3,452)
Total other comprehensive income	6,908			6,908
Ending balance at Mar. 31, 2022	$ 108,553	$ 392	$ 373,092	$ (4,242)	$ (259,993)	$ (696)
Ending balance (in shares) at Mar. 31, 2022	39,061,219	39,073,000