CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	12 Months Ended			73 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2011
Costs and Expenses:
Research and development	$ 13,418,754	$ 9,558,608	$ 3,732,734	$ 28,413,154
Purchased in-process research and development				28,156,502
General and administrative	6,745,642	6,562,658	4,467,289	19,644,642
Loss from Operations	(20,164,396)	(16,121,266)	(8,200,023)	(76,214,298)
Interest and investment income	89,708	108,562	74,923	278,186
Interest Expense	(11,877)			(11,877)
Other income	362,498	494,479		856,977
Change in fair value of derivative instruments-warrants	5,257,031	296,784		5,553,815
Total Other Income	5,697,360	899,825	74,923	6,677,101
Loss from Continuing Operations	(14,467,036)	(15,221,441)	(8,125,100)	(69,537,197)
Loss from discontinued operations				(71,821)
Net loss	$ (14,467,036)	$ (15,221,441)	$ (8,125,100)	$ (69,609,018)
Weighted Average Common Shares Outstanding Basic (restated for stock split) (in shares)	47,598,240	44,875,356	36,640,663
Weighted Average Common Shares Outstanding Diluted (restated for stock split) (in shares)	47,598,240	44,875,356	36,640,663
Net Loss per Common Share, Basic and Diluted
Net Loss per Common Share, Basic and Diluted (in dollars per share)	$ (0.30)	$ (0.34)	$ (0.22)