Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Gain	Treasury Stock
Balance, value at Dec. 31, 2010	$ 247,024	$ 338	$ 920,324	$ (673,406)	$ 5	$ (237)
Balance, shares at Dec. 31, 2010		337,566,000
Stock-based compensation	5,707	0	5,707	0	0	0
Issuance of common stock to designees of Symphony Icon Holdings LLC, value	0
Issuance of common stock under Equity Incentive Plans, shares		330,000
Issuance of common stock under Equity Incentive Plans, value	552	0	552	0	0	0
Issuance of common stock, net of fees, shares		142,493,000
Issuance of common stock, net of fees, value	160,592	142	160,450	0	0	0
Repurchase of common stock	(108)	0	0	0	0	(108)
Net loss	(116,215)	0	0	(116,215)	0	0
Unrealized gain (loss) on investments	16	0	0	0	16	0
Balance, value at Dec. 31, 2011	297,568	480	1,087,033	(789,621)	21	(345)
Balance, shares at Dec. 31, 2011		480,389,000
Stock-based compensation	6,495	0	6,495	0	0	0
Issuance of common stock to designees of Symphony Icon Holdings LLC, shares		13,238,000
Issuance of common stock to designees of Symphony Icon Holdings LLC, value	35,000	13	34,987	0	0	0
Issuance of common stock under Equity Incentive Plans, shares		1,248,000
Issuance of common stock under Equity Incentive Plans, value	1,054	1	1,053	0	0	0
Issuance of common stock, net of fees, shares		17,500,000
Issuance of common stock, net of fees, value	37,055	18	37,037	0	0	0
Repurchase of common stock	(285)	0	0	0	0	(285)
Net loss	(110,211)	0	0	(110,211)	0	0
Unrealized gain (loss) on investments	2	0	0	0	2	0
Balance, value at Dec. 31, 2012	266,678	512	1,166,605	(899,832)	23	(630)
Balance, shares at Dec. 31, 2012		512,375,000
Stock-based compensation	7,421	0	7,421	0	0	0
Issuance of common stock to designees of Symphony Icon Holdings LLC, value	0
Issuance of common stock under Equity Incentive Plans, shares		1,974,000
Issuance of common stock under Equity Incentive Plans, value	1,084	2	1,082	0	0	0
Repurchase of common stock	(873)	0	0	0	0	(873)
Net loss	(104,126)	0	0	(104,126)	0	0
Unrealized gain (loss) on investments	(21)	0	0	0	(21)	0
Balance, value at Dec. 31, 2013	$ 170,163	$ 514	$ 1,175,108	$ (1,003,958)	$ 2	$ (1,503)
Balance, shares at Dec. 31, 2013		514,349,000