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, 2018		17,253,011
Beginning Balance at Dec. 31, 2018	$ 376,609	$ 19	$ 251,329	$ 175,353	$ (18,483)	$ (31,609)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	152			152
Currency translation adjustment	(1,564)				(1,564)
Stock-based compensation	2,564		2,564
Common stock issued, net of shares withheld for employee taxes (in shares)		64,864
Common stock issued, net of shares withheld for employee taxes	(846)		(1,053)			207
Ending Balance (in shares) at Mar. 31, 2019		17,317,875
Ending Balance at Mar. 31, 2019	$ 376,588	$ 19	252,840	175,178	(20,047)	(31,402)
Beginning Balance (in shares) at Dec. 31, 2019	17,576,618	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	18,988,379	17,718,179
Ending Balance at Mar. 31, 2020	$ 316,790	$ 19	$ 270,940	$ 98,056	$ (21,177)	$ (31,048)