CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total	Preferred Stock	Common Stock	Additional Paid-In Capital	Treasury Stock	Accumulated Deficit
Balances at Dec. 31, 2011	$ 1,680		$ 3	$ 229,414	$ (7,159)	$ (220,578)
Balances (in shares) at Dec. 31, 2011			27,695,000		1,450,000
Increase (Decrease) in Stockholders' Equity
Warrants issued	43,590			43,590
Sale of common stock	569,000		11	568,989
Sale of common stock (in shares)			115,232,000
Reverse-stock-split rounding (in shares)			4,000
Sale of preferred stock	311,556	311,556
Sale of preferred stock (in shares)		4,000
Preferred stock conversion		(385,476)	5	385,471
Preferred stock conversion (in shares)		(4,000)	44,445,000
Offering costs	(19,603)	(14,525)		(5,078)
Common stock issuance	452,039		7	452,032
Common stock issuance (in shares)			72,114,000.0000
Net income (loss)	(53,885)					(53,885)
Preferred beneficial conversion feature	88,445			88,445
Non-cash preferred dividend		88,445		(88,445)
Long-term incentive plan grants (in shares)			312,000
Reduction in shares to cover individuals' tax withholding					(2,139)
Reduction in shares to cover individuals' tax withholding (in shares)					200,000
Reduction in shares to cover individuals' tax withholding	(2,139)
Share-based compensation	7,299			7,299
Balances at Dec. 31, 2012	1,397,982		26	1,681,717	(9,298)	(274,463)
Balances (in shares) at Dec. 31, 2012			259,802,000		1,650,000
Increase (Decrease) in Stockholders' Equity
Sale of preferred stock	345,000			345,000
Sale of preferred stock (in shares)		345,000
Preferred stock conversion	695,238		11	695,227
Preferred stock conversion (in shares)			108,801,000
Offering costs	(17,313)			(17,313)
Common stock issuance	222,870		4	222,866
Common stock issuance (in shares)			43,700,000.0000
Net income (loss)	(812,274)					(812,274)
Dividend on Series A preferred stock	(5,786)			4,133		(4,133)
Dividend on Series A preferred stock (in shares)			855,000
Long-term incentive plan grants (in shares)			3,256,000
Long-term incentive plan forfeitures (in shares)			(146,000)
Reduction in shares to cover individuals' tax withholding	(5)			(5)
Reduction in shares to cover individuals' tax withholding (in shares)			(1,000)
Retirement of shares in treasury				(2,492)	2,492
Retirement of shares in treasury (in shares)			(442,000)		(442,000)
Long-term incentive plan grants issued out of treasury				(6,806)	6,806
Long-term incentive plan grants issued out of treasury (in shares)			(1,208,000)		(1,208,000)
Share-based compensation	18,258			18,258
Balances at Sep. 30, 2013	$ 1,849,756		$ 41	$ 2,940,585		$ (1,090,870)
Balances (in shares) at Sep. 30, 2013		345,000	414,617,000