CONDENSED STATEMENTS OF OPERATIONS (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenue:
License revenue	$ 0	$ 0	$ 0	$ 200,000
Expenses:
Research and development	10,637,963	4,013,572	28,054,935	11,828,575
General and administrative	2,412,848	1,987,512	8,453,048	5,775,767
Total Expenses	13,050,811	6,001,084	36,507,983	17,604,342
Loss before other income (loss)	(13,050,811)	(6,001,084)	(36,507,983)	(17,404,342)
Other income (loss):
Interest income	78,735	31,068	238,750	106,890
Other income, net	20,779	822	28,680	202,520
Gain (loss) on warrant derivative liability	7,326,049	(4,010,811)	19,560,350	(3,172,324)
Net loss	$ (5,625,248)	$ (9,980,005)	$ (16,680,203)	$ (20,267,256)
Basic and diluted net loss per share (in dollars per share)	$ (0.10)	$ (0.33)	$ (0.31)	$ (0.67)
Basic and diluted weighted-average shares outstanding (in shares)	55,703,715	30,443,293	53,918,141	30,426,460