Statements of Operations (Unaudited) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Licensing revenue	$ 125,000
Operating expenses:
Research and development	3,203,177	4,693,007
General and administrative	1,688,729	1,570,466
Total operating expenses	4,891,906	6,263,473
Loss from operations	(4,766,906)	(6,263,473)
Other income (expense):
Gain from valuation of common stock warrant liability	4,280,297	77,600
Investment income, net	16,563	5,333
Interest expense	(180,928)	(5,701)
Total other income, net	4,115,932	77,232
Net Loss	(650,974)	(6,186,241)
Non-cash deemed dividends from beneficial conversion feature on convertible preferred stock	(4,601,410)
Net loss attributable to common shareholders	$ (5,252,384)	$ (6,186,241)
Net loss attributable to common shareholders per common share – basic and diluted (in Dollars per share)	$ (0.12)	$ (0.19)
Weighted average shares outstanding – basic and diluted (in Shares)	42,996,004	33,197,196