Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in-Capital	Treasury Stock	Accumulated Other Comprehensive Loss	Retained Earnings
Beginning balance (in shares) at Dec. 31, 2018		64,495,000		12,688,000
Beginning balance at Dec. 31, 2018	$ 180,955	$ 6	$ 239,960	$ (81,471)	$ (24,311)	$ 46,771
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(2,044)					(2,044)
Total other comprehensive income (loss) - foreign currency translation adjustments	712				712
Issuance of common stock upon exercise of stock awards, net of withheld shares (in shares)		39,000
Issuance of common stock upon exercise of stock awards, net of withheld shares	35		35
Stock-based compensation expense	739		739
Ending balance (in shares) at Mar. 31, 2019		64,534,000		12,688,000
Ending balance at Mar. 31, 2019	180,556	$ 6	240,734	$ (81,471)	(23,599)	44,886
Beginning balance (in shares) at Dec. 31, 2019		64,820,000		12,688,000
Beginning balance at Dec. 31, 2019	178,252	$ 6	245,311	$ (81,471)	(22,449)	36,855
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(2,840)					(2,840)
Total other comprehensive income (loss) - foreign currency translation adjustments	(5,096)				(5,096)
Issuance of common stock upon exercise of stock awards, net of withheld shares (in shares)		11,000
Issuance of common stock upon exercise of stock awards, net of withheld shares	(22)		(22)
Stock-based compensation expense	1,480		1,480
Ending balance (in shares) at Mar. 31, 2020		64,831,000		12,688,000
Ending balance at Mar. 31, 2020	$ 171,891	$ 6	$ 246,769	$ (81,471)	$ (27,545)	$ 34,132