Condensed Consolidated Statement of Stockholders' Equity (Deficit) (Unaudited) - 9 months ended Sep. 30, 2017 - 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, 2016	$ (17,665)	$ 54	$ 292,667	$ (47)	$ (310,341)	$ 2
Beginning Balance, shares at Dec. 31, 2016		54,133,511				2,093,155
Stock-based compensation	10,223		10,223
Restricted stock awards		$ 2	(2)
Restricted stock awards, shares		1,568,042
Issuance of warrants	4,489		4,489
Exercise of stock options	$ 313		313
Exercise of stock options, shares	151,373	151,373
Net income	$ 21,495				21,495
Ending Balance at Sep. 30, 2017	$ 18,855	$ 56	$ 307,690	$ (47)	$ (288,846)	$ 2
Ending Balance, shares at Sep. 30, 2017		55,852,926				2,093,155