Unaudited Condensed Consolidated Statement of Changes in Stockholders' Equity (Deficit) - 9 months ended Sep. 30, 2016 - USD ($) $ in Thousands	Total	Common stock	Additional paid-in capital	(Accumulated deficit) retained earnings	Accumulated other comprehensive (loss)
Balance at December 31, 2015 (shares) at Dec. 31, 2015	196,216,596	196,216,596
Balance at December 31, 2015 at Dec. 31, 2015	$ 9,281	$ 1,962	$ 64,899	$ (57,549)	$ (31)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income	$ 72				72
Issuance of restricted stock (shares)	31,871
Issuance of restricted stock awards	$ 814	$ 0	814
Exercise of stock options (shares)	266,813	266,813
Exercise of stock options	$ 1,805	$ 3	1,802
Tax benefit from exercise of stock options	0		0
Stock-based compensation expense	2,237		2,237
Net income	$ 95,439			95,439
Balance at June 30, 2016 (shares) at Sep. 30, 2016	196,515,280	196,515,280
Balance at September 30, 2016 at Sep. 30, 2016	$ 109,648	$ 1,965	$ 69,752	$ 37,890	$ 41