Statements of Operations (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Licensing revenue				$ 2,000,000
Operating expenses:
Research and development	3,539,309	5,414,284	12,344,559	14,726,942
General and administrative	1,420,258	1,408,828	4,586,005	3,906,095
Total operating expenses	4,959,567	6,823,112	16,930,564	18,633,037
Loss from operations	(4,959,567)	(6,823,112)	(16,930,564)	(16,633,037)
Other (expense) income:
(Loss) gain from valuation of common stock warrant liability	(881,127)	375,378	(1,250,850)	(42,482)
Investment (loss) income, net	(5,581)	26,347	61,828	26,911
Interest and dividend expense	(171,720)	(13,710)	(187,995)	(494,797)
Other income (expense)		42,145	(1,040)	42,145
Total other (expense) income, net	(1,058,428)	430,160	(1,378,057)	(468,223)
Net Loss	$ (6,017,995)	$ (6,392,952)	$ (18,308,621)	$ (17,101,260)
Net loss per common share – basic and diluted (in Dollars per share)	$ (0.18)	$ (0.25)	$ (0.55)	$ (0.93)
Weighted average shares outstanding – basic and diluted (in Shares)	33,641,810	25,150,084	33,412,822	18,360,149