Consolidated Statements of Shareholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]
Balance, Value at Dec. 31, 2011	$ 40,749	$ 2,787	$ 148,839	$ (110,806)	$ (71)
Balance, Shares at Dec. 31, 2011		69,678,982			9,395
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(17,598)			(17,598)
Share-based compensation, value	710	7	703
Share-based compensation, shares		165,800
Balance, Value 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, value	71	7	64
Exercise of share-based awards, shares		182,930
Share-based compensation, value	643	14	629
Share-based compensation, shares		354,832
Balance, Value 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, value	29	2	27
Exercise of share-based awards, shares	57,300	57,300
Share-based compensation, value	503	18	485
Share-based compensation, shares		436,154
Balance, Value at Dec. 31, 2014	$ 5,357	$ 2,835	$ 150,747	$ (148,154)	$ (71)
Balance, Shares at Dec. 31, 2014		70,875,998			9,395