Condensed Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Operating expenses:
Research and development	$ 1,837,743	$ 3,088,373	$ 6,445,842	$ 7,815,466
General and administrative	819,703	732,800	2,821,382	2,420,167
Total operating expenses	2,657,446	3,821,173	9,267,224	10,235,633
Loss from operations	(2,657,446)	(3,821,173)	(9,267,224)	(10,235,633)
Other income (expense):
Interest income	470	1,725	3,121	8,995
Interest expense	(78,424)	(5,906)	(233,208)	(101,240)
Total other expense	(77,954)	(4,181)	(230,087)	(92,245)
Net loss	$ (2,735,400)	$ (3,825,354)	$ (9,497,311)	$ (10,327,878)
Net loss per common share, basic and diluted	$ (0.42)	$ (0.63)	$ (1.51)	$ (1.71)
Weighted-average shares used to compute basic and diluted net loss per share	6,494,845	6,054,250	6,271,002	6,028,309