Unaudited Condensed Consolidated Statement of Changes in Stockholders' Deficit Statement - 6 months ended Jun. 30, 2015 - USD ($) $ in Thousands	Total	Common stock	Additional paid-in capital	(Accumulated deficit) retained earnings
Balance at December 31, 2014 (shares) at Dec. 31, 2014	195,743,154	195,743,154
Balance at December 31, 2014 at Dec. 31, 2014	$ (87,297)	$ 1,957	$ 57,683	$ (146,937)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (shares)		5,880
Exercise of stock options	43		43
Stock-based compensation expense	901		901
Net income	$ 52,684			52,684
Balance at June 30, 2015 (shares) at Jun. 30, 2015	195,749,034	195,749,034.000
Balance at June 30, 2015 at Jun. 30, 2015	$ (33,669)	$ 1,957	$ 58,627	$ (94,253)