Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid In Capital	Retained Deficit	Accumulated Other Comp. Loss
Beginning balance (in shares) at Dec. 31, 2018		30,513,000
Beginning balance at Dec. 31, 2018	$ 109,596	$ 318	$ (10,245)	$ 243,007	$ (76,013)	$ (47,471)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive loss	9,780				9,986	(206)
Ending balance (in shares) at Mar. 31, 2019		30,513,000
Ending balance at Mar. 31, 2019	$ 120,065	$ 318	(10,245)	243,768	(66,099)	(47,677)
Beginning balance (in shares) at Dec. 31, 2019	30,801,255	30,801,000
Beginning balance at Dec. 31, 2019	$ 128,688	$ 323	(11,230)	245,852	(60,307)	(45,950)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense (in shares)		46,000
Share-based compensation expense	862			862
Total comprehensive loss	$ (32,624)				(24,594)	(8,030)
Ending balance (in shares) at Mar. 31, 2020	30,847,269	30,847,000
Ending balance at Mar. 31, 2020	$ 96,926	$ 323	$ (11,230)	$ 246,714	$ (84,901)	$ (53,980)