CONDENSED STATEMENTS OF OPERATIONS (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenue:
License revenue	$ 0	$ 0
Expenses:
Research and development	6,772,582	8,151,305
General and administrative	2,979,057	3,958,434
Total expenses	9,751,639	12,109,739
Loss before other income (expense)	(9,751,639)	(12,109,739)
Other:
Interest income	60,543	61,738
Interest expense	(1,322,715)	(416,803)
Other income, net	1,826	5,964
Loss on warrant derivative liabilities	(32,119)	(184,272)
Net loss	$ (11,044,104)	$ (12,643,112)
Basic and diluted net loss per share (in dollars per share)	$ (0.10)	$ (0.19)
Basic and diluted weighted-average shares outstanding (in shares)	113,577,313	66,488,855