Condensed Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Revenues:
Product revenue, net	$ 11,075		$ 1,706		$ 19,079		$ 2,056
License revenues	33		5,210		33		5,210
Total revenues	11,108		6,916		19,112		7,266
Costs and expenses:
Cost of product sales	5,756		981		10,002		1,270
Amortization of patent license	336		336		672		896
Research and development	1,700		2,600		3,211		5,346
Selling, general and administrative	23,241		21,082		46,772		41,060
Other	1		(1)		1		(1)
Total costs and expenses	31,034		24,998		60,658		48,571
Loss from operations	(19,926)		(18,082)		(41,546)		(41,305)
Other (expense) income:
Interest income	27		37		63		79
Interest expense	(1,110)		(1,163)		(2,209)		(2,353)
Other expense	20		(6)		30		(7)
Total other expense, net	(1,063)		(1,132)		(2,116)		(2,281)
Net loss	$ (20,989)		$ (19,214)		$ (43,662)		$ (43,586)
Basic and diluted net loss per share(1)	$ (0.25)	[1]	$ (0.30)	[1]	$ (0.51)	[1]	$ (0.69)	[1]
Shares used to compute basic and diluted net loss per share(1)	85,553	[1]	63,428	[1]	85,536	[1]	63,307	[1]

[1] (1) There is a lack of comparability in the per share amounts between the periods presented as a result of the issuance of shares of common stock pursuant to a public offering in November 2011. Please see Note 4 of the Notes to Condensed Financial Statements for further discussion.