CONDENSED STATEMENTS OF OPERATIONS (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenue:
License revenue	$ 0	$ 0	$ 200,000	$ 0
Expenses:
Research and development	4,013,572	3,157,656	11,828,575	10,245,637
General and administrative	1,987,512	1,729,893	5,775,767	5,736,464
Total Expenses	6,001,084	4,887,549	17,604,342	15,982,101
Loss before other income (loss)	(6,001,084)	(4,887,549)	(17,404,342)	(15,982,101)
Other income (loss):
Interest income	31,068	25,034	106,890	88,039
Other income, net	822	10,370	202,520	60,921
Gain (loss) on warrant derivative liabilities	(4,010,811)	6,436,342	(3,172,324)	(5,980,016)
Net income (loss)	$ (9,980,005)	$ 1,584,197	$ (20,267,256)	$ (21,813,157)
Basic net income (loss) per share (in dollars per share)	$ (0.33)	$ 0.07	$ (0.67)	$ (1.03)
Basic weighted-average shares outstanding (in shares)	30,443,293	21,208,660	30,426,460	21,208,960
Diluted net income (loss) per share (in dollars per share)	$ (0.33)	$ 0.07	$ (0.67)	$ (1.03)
Diluted weighted-average shares outstanding (in shares)	30,443,293	21,724,986	30,426,460	21,208,960