CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Dec. 31, 2016	$ 174	$ (2,000)	$ 62,856	$ (47,790)	$ (329)	$ 12,911
Balance (in shares) at Dec. 31, 2016	173,812	(10,308)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	$ 2	$ 0	512	0	0	514
Share-based compensation (in shares)	1,930
Shares not issued for employee tax liability	$ 0	0	(5)	0	0	(5)
Foreign currency translation gain	0	0	0	0	271	271
Net loss	0	0	0	(4,539)	0	(4,539)
Balance at Dec. 31, 2017	$ 176	$ (2,000)	63,363	(52,329)	(58)	9,152
Balance (in shares) at Dec. 31, 2017	175,742	(10,308)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	$ 0	$ 0	141	0	0	141
Share-based compensation (in shares)	167
Foreign currency translation gain	$ 0	0	0	0	184	184
Net loss	0	0	0	(2,069)	0	(2,069)
Balance at Mar. 31, 2018	$ 176	$ (2,000)	63,504	(54,259)	126	7,547
Balance (in shares) at Mar. 31, 2018	175,909	(10,308)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of new accounting standard | ASC 606 [Member]	$ 0	$ 0	$ 0	$ 139	$ 0	$ 139