Condensed Statements of Operations (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating expenses:
Research and development	$ 770,686	$ 2,015,076
General and administrative	1,209,570	1,137,753
Total operating expenses	1,980,256	3,152,829
Loss from operations	(1,980,256)	(3,152,829)
Other expenses:
Interest income (expense), net	964	(72,580)
Change in fair value of warrant liability	(3,072,747)
Total other expenses	(3,071,783)	(72,580)
Net loss	$ (5,052,039)	$ (3,225,409)
Net loss per share of common stock, basic and diluted	$ (0.37)	$ (0.45)
Weighted-average shares used to compute basic and diluted net loss per share	13,528,311	7,168,005