CONDENSED STATEMENTS OF OPERATIONS (Unaudited) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenue:
License revenue	$ 200,000	$ 0	$ 200,000	$ 0
Expenses:
Research and development	4,626,244	2,686,465	7,815,003	7,087,980
General and administrative	1,970,930	2,091,856	3,788,255	4,006,572
Total Expenses	6,597,174	4,778,321	11,603,258	11,094,552
Loss before other income (loss)	(6,397,174)	(4,778,321)	(11,403,258)	(11,094,552)
Other income (loss):
Interest income	35,564	27,547	75,822	63,005
Other income, net	4,761	16,491	201,698	50,551
Gain (loss) on warrant derivative liability	2,933,707	(8,528,192)	838,487	(12,416,358)
Net loss	$ (3,423,142)	$ (13,262,475)	$ (10,287,251)	$ (23,397,354)
Basic and diluted net loss per share (in dollars per share)	$ (0.11)	$ (0.63)	$ (0.34)	$ (1.10)
Basic and diluted weighted average shares outstanding (in shares)	30,418,435	21,204,499	30,417,906	21,203,754