CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]		Additional Paid-in Capital [Member]	Accumulated Deficit [Member]
Balance at Dec. 31, 2012	$ (3,357)	$ 93		$ 180,145	$ (183,595)
Balance (in shares) at Dec. 31, 2012		93,489,809
Share-based compensation related to stock options	1,013			1,013
Share-based compensation related to restricted stock award, net of forfeitures	3,076			3,076
Share-based compensation related to restricted stock award, net of forfeitures (in shares)		(17,834)
Exercise of options granted to employees	112		[1]	112
Exercise of options granted to employees (in shares)		79,123
Net loss from continuing operations	(34,737)				(34,737)
Net income from discontinued operations	6,947				6,947
Balance at Dec. 31, 2013	(26,946)	$ 93		184,346	(211,385)
Balance (in shares) at Dec. 31, 2013		93,551,098
Share-based compensation related to stock options	467			467
Share-based compensation related to restricted stock award, net of forfeitures	775			775
Share-based compensation related to restricted stock award, net of forfeitures (in shares)		(81,209)
Exercise of options granted to employees	46	$ 1		45
Exercise of options granted to employees (in shares)		133,930
Net loss from continuing operations	(33,298)				(33,298)
Net income from discontinued operations	3,355				3,355
Balance at Dec. 31, 2014	(55,601)	$ 94		185,633	(241,328)
Balance (in shares) at Dec. 31, 2014		93,603,819
Issuance of common stock	6,101	$ 6		6,095
Issuance of common stock (in shares)		5,649,079
Share-based compensation related to stock options	1,273			1,273
Share-based compensation related to restricted stock award, net of forfeitures	529			529
Share-based compensation related to restricted stock award, net of forfeitures (in shares)		(2,501)
Exercise of options granted to employees	534		[1]	534
Exercise of options granted to employees (in shares)		550,000
Net loss from continuing operations	(27,282)				(27,282)
Net income from discontinued operations	85,319				85,319
Balance at Dec. 31, 2015	$ 10,873	$ 100		$ 194,064	$ (183,291)
Balance (in shares) at Dec. 31, 2015		99,800,397

[1] Represents an amount less than $1.