CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-in Capital	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	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)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201409Member
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)	(6,253)
Currency translation adjustment	(301)
Ending Balance (in shares) at Jun. 30, 2019			17,339,062
Ending Balance at Jun. 30, 2019	374,339		$ 19	255,706	168,773		(18,784)	(31,375)
Beginning Balance (in shares) at Mar. 31, 2019			17,317,875
Beginning Balance at Mar. 31, 2019	376,588		$ 19	252,840	175,178		(20,047)	(31,402)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(6,405)				(6,405)
Currency translation adjustment	1,263						1,263
Stock-based compensation	2,752			2,752
Common stock issued, net of shares withheld for employee taxes (in shares)			21,187
Common stock issued, net of shares withheld for employee taxes	141			114				27
Ending Balance (in shares) at Jun. 30, 2019			17,339,062
Ending Balance at Jun. 30, 2019	$ 374,339		$ 19	255,706	168,773		(18,784)	(31,375)
Beginning Balance (in shares) at Dec. 31, 2019	17,576,618		17,576,618
Beginning Balance at Dec. 31, 2019	$ 331,992	$ (327)	$ 19	267,868	112,879	$ (327)	(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, 2019	17,576,618		17,576,618
Beginning Balance at Dec. 31, 2019	$ 331,992	$ (327)	$ 19	267,868	112,879	$ (327)	(17,399)	(31,375)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(23,755)
Currency translation adjustment	$ (5,466)
Ending Balance (in shares) at Jun. 30, 2020	18,988,379		17,769,580
Ending Balance at Jun. 30, 2020	$ 308,561		$ 19	273,325	89,124		(22,865)	(31,042)
Beginning Balance (in shares) at Mar. 31, 2020			17,718,179
Beginning Balance at Mar. 31, 2020	316,790		$ 19	270,940	98,056		(21,177)	(31,048)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(8,932)				(8,932)
Currency translation adjustment	(1,688)						(1,688)
Stock-based compensation	2,167			2,167
Common stock issued, net of shares withheld for employee taxes (in shares)			51,401
Common stock issued, net of shares withheld for employee taxes	$ 224			218				6
Ending Balance (in shares) at Jun. 30, 2020	18,988,379		17,769,580
Ending Balance at Jun. 30, 2020	$ 308,561		$ 19	$ 273,325	$ 89,124		$ (22,865)	$ (31,042)