Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Accumulated Deficit [Member]	Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect adjustment from adoption of accounting standard	$ 0			$ 675		$ (675)
Beginning balance (shares) at Dec. 31, 2015		4,738,000	(322,000)
Beginning balance at Dec. 31, 2015	28,921	$ 47	$ (28,130)	356,746	$ (1,594)	(298,402)	$ 254
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Release of performance shares, Shares		24,000
Release of performance shares, value	0	$ 1		(1)
Stock Received for Payment of Employee Taxes on Vesting of Performance Shares and Upon Exercise of Stock Options Shares		(8,000)
Stock Received for Payment of Employee Taxes on Vesting of Performance Shares and Upon Exercise of Stock Options	(43)			(43)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	746			746
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	(853)				(853)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	10				10
Net loss	$ (4,103)					(4,103)	0
Ending balance (shares) at Dec. 31, 2016	4,753,654	4,754,000	(322,000)
Ending balance at Dec. 31, 2016	$ 24,678	$ 48	$ (28,130)	358,123	(2,437)	(303,180)	254
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Release of performance shares, Shares		137,000
Release of performance shares, value	0	$ 1		(1)
Stock Received for Payment of Employee Taxes on Vesting of Performance Shares and Upon Exercise of Stock Options Shares		(49,000)
Stock Received for Payment of Employee Taxes on Vesting of Performance Shares and Upon Exercise of Stock Options	(241)	$ (1)		(240)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	1,457			1,457
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	617				617
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	(1)				(1)
Net loss	$ (4,623)					(4,623)	0
Ending balance (shares) at Dec. 31, 2017	4,842,294	4,842,000	(322,000)
Ending balance at Dec. 31, 2017	$ 21,887	$ 48	$ (28,130)	$ 359,339	$ (1,821)	$ (307,803)	$ 254