CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Common Stock in Treasury
Beginning Balance (in shares) at Dec. 31, 2019		17,576,618
Beginning Balance at Dec. 31, 2019	$ 331,992	$ 19	$ 267,868	$ 112,879	$ (17,399)	$ (31,375)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(14,823)			(14,823)
Currency translation adjustment	(3,778)				(3,778)
Stock-based compensation	2,178		2,178
Common stock issued, net of shares withheld for employee taxes (in shares)		141,561
Common stock issued, net of shares withheld for employee taxes	1,221		894			327
Ending Balance (in shares) at Mar. 31, 2020		17,718,179
Ending Balance at Mar. 31, 2020	$ 316,790	$ 19	270,940	98,056	(21,177)	(31,048)
Beginning Balance (in shares) at Dec. 31, 2020	17,990,707	17,990,707
Beginning Balance at Dec. 31, 2020	$ 360,303	$ 19	287,979	113,508	(10,160)	(31,043)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(3,221)			(3,221)
Currency translation adjustment	(10,174)				(10,174)
Stock-based compensation	2,094		2,094
Common stock issued, net of shares withheld for employee taxes (in shares)		163,457
Common stock issued, net of shares withheld for employee taxes	$ 1,781		1,530			251
Ending Balance (in shares) at Mar. 31, 2021	19,384,350	18,154,164
Ending Balance at Mar. 31, 2021	$ 350,783	$ 19	$ 291,603	$ 110,287	$ (20,334)	$ (30,792)