Statements of Operations (unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Operating costs and expenses:
Research and development	$ 3,042,671	$ 2,885,892	$ 7,969,731	$ 7,733,533
General and administrative	1,974,757	1,223,137	6,236,942	2,874,034
Total operating costs and expenses	5,017,428	4,109,029	14,206,673	10,607,567
Loss from operations	(5,017,428)	(4,109,029)	(14,206,673)	(10,607,567)
Other income, net	46,659	5,924	113,464	54,428
Change in fair value of warrants liability	521,731	(906,787)	(324,591)	(1,465,892)
Loss before income taxes	(4,449,038)	(5,009,892)	(14,417,800)	(12,019,031)
Provision for income taxes	0	0	0	0
Net loss	$ (4,449,038)	$ (5,009,892)	$ (14,417,800)	$ (12,019,031)
Net loss per share - basic and diluted	$ (0.05)	$ (0.07)	$ (0.18)	$ (0.19)
Weighted average shares outstanding - basic and diluted	82,470,139	67,169,383	80,205,864	62,539,571