Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]
Balance at Dec. 31, 2012	$ 23,861	$ 2,794	$ 149,542	$ (128,404)	$ (71)
Balance, Shares at Dec. 31, 2012		69,844,782			9,395
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(11,275)			(11,275)
Exercise of share-based awards	71	$ 7	64
Exercise of share-based awards, shares		182,930
Share-based compensation	643	$ 14	629
Share-based compensation, shares		354,832
Balance at Dec. 31, 2013	13,300	$ 2,815	150,235	(139,679)	$ (71)
Balance, Shares at Dec. 31, 2013		70,382,544			9,395
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(8,475)			(8,475)
Exercise of share-based awards	29	$ 2	27
Exercise of share-based awards, shares		57,300
Share-based compensation	503	$ 18	485
Share-based compensation, shares		436,154
Balance at Dec. 31, 2014	5,357	$ 2,835	150,747	(148,154)	$ (71)
Balance, Shares at Dec. 31, 2014		70,875,998			9,395
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(10,874)			(10,874)
Exercise of share-based awards	$ 23	$ 2	21
Exercise of share-based awards, shares	50,000	50,000
Share-based compensation	$ 440	$ 24	416
Share-based compensation, shares		600,000
Issuance of common stock	3,000	$ 260	2,740
Issuance of common stock, shares		6,500,000
Issuance of warrant	2,656		2,656
Amortization of deferred financing related to warrant	(385)		(385)
Balance at Dec. 31, 2015	$ 217	$ 3,121	$ 156,195	$ (159,028)	$ (71)
Balance, Shares at Dec. 31, 2015		78,025,998			9,395