STATEMENTS OF OPERATIONS (Unaudited) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
STATEMENTS OF OPERATIONS [Abstract]
Licensing revenue (Note 13)	$ 0	$ 2,000,000
Operating expenses:
Research and development	4,693,007	4,348,636
General and administrative	1,570,466	1,215,283
Total operating expenses	6,263,473	5,563,919
Loss from operations	(6,263,473)	(3,563,919)
Other (expense) income:
Gain from valuation of common stock warrant liability	77,600	168,311
Investment income	5,333	467
Interest and dividend expense	(5,701)	(369,142)
Total other income (expense), net	77,232	(200,364)
Net Loss	$ (6,186,241)	$ (3,764,283)
Net loss per common share - basic and diluted (in dollars per share)	$ (0.19)	$ (0.28)
Weighted average shares outstanding - basic and diluted (in shares)	33,197,196	13,452,939