Condensed Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Operating expenses:
Research and development	$ 1,339,343	$ 1,837,743	$ 5,449,568	$ 6,445,842
General and administrative	830,092	819,703	2,770,500	2,821,382
Total operating expenses	2,169,435	2,657,446	8,220,068	9,267,224
Loss from operations	(2,169,435)	(2,657,446)	(8,220,068)	(9,267,224)
Other expenses
Interest expense, net	(123,209)	(77,954)	(268,483)	(230,087)
Financing costs related to warrant liability	(533,692)		(533,692)
Change in fair value of warrant liability	(198,945)		(198,945)
Total other expenses	(855,846)	(77,954)	(1,001,120)	(230,087)
Net loss	$ (3,025,281)	$ (2,735,400)	$ (9,221,188)	$ (9,497,311)
Net loss per common share, basic and diluted	$ (0.29)	$ (0.42)	$ (1.11)	$ (1.51)
Weighted-average shares used to compute basic and diluted net loss per share	10,614,692	6,494,845	8,341,750	6,271,002