Unaudited Condensed Consolidated Statement of Changes in Stockholders' Equity (Deficit) - 3 months ended Mar. 31, 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	$ 28				28
Exercise of stock options (shares)	4,700	4,700
Exercise of stock options	$ 61	$ 0	61
Income tax benefit from exercise of stock options	3		3
Stock-based compensation expense	447		447
Net income	$ 37,333			37,333
Balance at March 31, 2016 (shares) at Mar. 31, 2016	196,221,296	196,221,296
Balance at March 31, 2016 at Mar. 31, 2016	$ 47,153	$ 1,962	$ 65,410	$ (20,216)	$ (3)