CONDENSED STATEMENTS OF OPERATIONS (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue:
License revenue	$ 0	$ 0
Expenses:
Research and development	1,455,806	6,772,582
General and administrative	2,463,559	2,979,057
Total expenses	3,919,365	9,751,639
Loss before other income (expense)	(3,919,365)	(9,751,639)
Other:
Interest income	82,934	60,543
Interest expense	(692,787)	(1,322,715)
Other income, net	232	1,826
Gain (loss) on warrant derivative liabilities	453,412	(32,119)
Net loss	$ (4,075,574)	$ (11,044,104)
Basic and diluted net loss per share (in dollars per share)	$ (0.15)	$ (0.60)
Basic and diluted weighted-average shares outstanding (in shares)	27,391,506	18,929,553