Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - 9 months ended Sep. 30, 2015 - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Accumulated Deficit [Member]	Series A Preferred Stock [Member]
Beginning Balance at Dec. 31, 2014	$ 54,396	$ 52	$ 259,920	$ (47)	$ (205,531)	$ 2
Beginning Balance, shares at Dec. 31, 2014		51,603,070				2,139,000
Stock-based compensation	12,703		12,703
Restricted stock awards		$ 1	(1)
Restricted stock awards, shares		857,677
Exercise of stock options	$ 480		480
Exercise of stock options, shares	160,050	148,493
Exercise of warrants	$ 1		1
Exercise of warrants, shares		284
Short swing profit return	6		6
Conversion of preferred shares to common shares	0	$ 0	0	0	0	$ 0
Conversion of preferred shares to common shares, shares		45,845				(45,845)
Equity financing costs	(40)		(40)
Net loss	(47,844)				(47,844)
Ending Balance at Sep. 30, 2015	$ 19,702	$ 53	$ 273,069	$ (47)	$ (253,375)	$ 2
Ending Balance, shares at Sep. 30, 2015		52,655,369				2,093,155