Condensed Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Balance at Dec. 31, 2017	$ 213,719	$ 240	$ 277,520	$ (23)	$ (64,018)
Balance (in shares) at Dec. 31, 2017		23,997,385
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(845)				(845)
Other comprehensive income (losses)	(18)			(18)
Balance at Mar. 31, 2018	212,856	$ 240	277,520	(41)	(64,863)
Balance (in shares) at Mar. 31, 2018		23,997,385
Balance at Dec. 31, 2018	213,179	$ 237	277,520	(19)	(64,559)
Balance (in shares) at Dec. 31, 2018		23,714,208
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(705)				(705)
Other comprehensive income (losses)	19			19
Repurchase of common stock	(1,059)	$ (1)			(1,058)
Repurchase of common stock (in shares)		(130,686)
Balance at Mar. 31, 2019	$ 211,434	$ 236	$ 277,520	$ 0	$ (66,322)
Balance (in shares) at Mar. 31, 2019		23,583,522