CONDENSED STATEMENTS OF OPERATIONS (Unaudited) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenue:
Licensing revenue	$ 0	$ 0
Expenses:
Research and development	3,188,759	4,401,515
General and administrative	1,817,325	1,914,715
Total Expenses	5,006,084	6,316,230
Loss before other income (loss)	(5,006,084)	(6,316,230)
Other income (loss):
Interest income	40,258	35,458
Other income, net	196,937	34,059
Loss on warrant derivative liability	(2,095,220)	(3,888,166)
Net loss	$ (6,864,109)	$ (10,134,879)
Basic and diluted net loss per share (in dollars per share)	$ (0.23)	$ (0.49)
Basic and diluted weighted average shares outstanding (in shares)	30,417,370	21,203,867