Consolidated Statements Of Operations (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Revenues:
Product royalty revenues	$ 2,716,452	$ 1,884,080	$ 2,844,415
Product royalties, related party			15,411
Research revenue	227,668	726,948	177,373
Sponsored research revenue		244,479
Contract revenue	318,800	549,390	59,777,633
Total revenues	3,262,920	3,404,897	62,814,832
Cost of product royalties	1,756,629	839,208	2,043,693
Expenses:
Research and development	20,805,177	10,645,414	10,177,644
Related party research and development			143,065
General and administrative	7,608,090	7,913,370	8,399,812
Related party general and administrative	81,000	82,529	1,921,400
Impairment of intangible license		243,648
Total expenses	28,494,267	18,884,961	20,641,921
(Loss) income from operations	(26,987,976)	(16,319,272)	40,129,218
Interest income (expense), net	188,701	133,613	35,596
Derivative gain (loss)	3,463,453	3,126,771	(6,790,827)
Other income (expenses), net	10,706	25,946	(15,110)
(Loss) income before taxes	(23,325,116)	(13,032,942)	33,358,877
Income tax expense			(312,128)
Net (loss) income	(23,325,116)	(13,032,942)	33,046,749
Net (loss) income attributable to common stockholders	$ (23,325,116)	$ (13,032,942)	$ 33,046,749
Basic:
Weighted average common stock shares outstanding	28,322,477	23,150,975	20,224,706
Basic earnings per share	$ (0.82)	$ (0.56)	$ 1.63
Diluted:
Diluted weighted average common stock shares outstanding	28,322,477	23,150,975	21,499,083
Diluted earnings per share	$ (0.82)	$ (0.56)	$ 1.54