Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Deficit [Member]	Noncontrolling Interest [Member]
Common Stock, Shares, Issued at Dec. 31, 2013		4,657,000	322,000
Beginning balance at Dec. 31, 2013	$ 67,977	$ 47	$ (28,130)	$ 355,099	$ 1,015	$ (260,843)	$ 789
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options	17			17
Release of performance shares, Shares		46,000
Release of performance shares, value	0
Stock Received for Payment of Employee Taxes on Vesting of Performance Shares and Upon Exercise of Stock Options Shares		(17,000)
Stock Received for Payment of Employee Taxes on Vesting of Performance Shares and Upon Exercise of Stock Options	(422)			(422)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	1,197			1,197
Stock issued for Lumewave acquisition, Shares		34,000
Stock issued for Lumewave acquisition	715			715
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	(1,431)				(1,431)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	(15)				(15)
Net loss including non-controlling interest	(24,861)					(24,326)	(535)
Common Stock, Shares, Issued at Dec. 31, 2014		4,720,000	322,000
Ending balance at Dec. 31, 2014	43,177	$ 47	$ (28,130)	356,606	(431)	(285,169)	254
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Release of performance shares, Shares		34,000
Release of performance shares, value	0
Stock Received for Payment of Employee Taxes on Vesting of Performance Shares and Upon Exercise of Stock Options Shares		(16,000)
Stock Received for Payment of Employee Taxes on Vesting of Performance Shares and Upon Exercise of Stock Options	(153)			(153)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	293			293
Stock issued for Lumewave acquisition	0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	(1,158)				(1,158)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	(5)				(5)
Net loss including non-controlling interest	$ (13,233)					(13,233)	0
Common Stock, Shares, Issued at Dec. 31, 2015	4,738,370	4,738,000	322,000
Ending balance at Dec. 31, 2015	$ 28,921	$ 47	$ (28,130)	356,746	(1,594)	(298,402)	254
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect adjustment from adoption of accounting standard	0			675		(675)
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
Stock issued for Lumewave acquisition	0
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 including non-controlling interest	$ (4,103)					(4,103)	0
Common Stock, Shares, Issued 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