Condensed Consolidated Statements of Redeemable Convertible Preferred Stock and Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Redeemable Convertible Preferred Stock [Member]	Convertible ​Series A [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated earnings (deficit) [Member]
Beginning Balance at Dec. 31, 2013	$ 65,129			$ 2	$ 77,142	$ (12,015)
Beginning Balance, Shares at Dec. 31, 2013				201,842,351
Net (loss) income	3,070					3,070
Issuance of preferred stock and warrants to purchase common stock, net of offering costs	19,224				19,224
Series B preferred stock dividends					9,455	(9,455)
Issuance of common stock under restricted share compensation arrangement, Shares				500,894
Equity-based compensation	807				807
Ending Balance at Dec. 31, 2014	88,230			$ 2	106,628	(18,400)
Ending Balance, Shares at Dec. 31, 2014				202,343,245
Issuance of preferred stock and warrants to purchase common stock, net of offering costs, Shares			1,000,000
Convertible preferred stock, shares issued			1,000,000
Net (loss) income	(67,982)					(67,982)
Series B preferred stock dividends	(8,748)					(8,748)
Issuance of common stock under restricted share compensation arrangement, Shares				3,824,790
Equity-based compensation	779				779
Ending Balance at Jun. 30, 2015	$ 12,279			$ 2	$ 107,407	$ (95,130)
Ending Balance, Shares at Jun. 30, 2015			1,000,000	206,168,035
Preferred Stock Issued Shares Issued Value		$ 502,213
Issuance of preferred stock (par value as net proceeds treated as mezzanine)		600,000
Preferred Stock Value, Ending Balance		$ 502,213
Redeemable Convertible preferred stock, shares outstanding		600,000