Statements of Operations (unaudited) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Licensing revenue				$ 2,000,000
Operating expenses:
Research and development	4,112,243	4,964,022	8,805,250	9,312,658
General and administrative	1,595,281	1,281,984	3,165,747	2,497,267
Total operating expenses	5,707,524	6,246,006	11,970,997	11,809,925
Loss from operations	(5,707,524)	(6,246,006)	(11,970,997)	(9,809,925)
Other (expense) income:
Loss from valuation of common stock warrant liability	(447,323)	(586,171)	(369,723)	(417,860)
Investment income	62,076	97	67,409	564
Interest and dividend expense	(10,574)	(111,945)	(16,275)	(481,087)
Other expense	(1,040)		(1,040)
Total other expense, net	(396,861)	(698,019)	(319,629)	(898,383)
Net Loss	$ (6,104,385)	$ (6,944,025)	$ (12,290,626)	$ (10,708,308)
Net loss per common share – basic and diluted (in Dollars per share)	$ (0.18)	$ (0.42)	$ (0.37)	$ (0.72)
Weighted average shares outstanding – basic and diluted (in Shares)	33,236,066	16,366,409	33,211,059	14,914,438