CONDENSED STATEMENTS OF OPERATIONS (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenue:
License revenue	$ 0	$ 0
Expenses:
Research and development	8,151,305	12,563,745
General and administrative	3,958,434	3,130,232
Total expenses	12,109,739	15,693,977
Loss before other income (expense)	(12,109,739)	(15,693,977)
Other:
Interest income	61,738	56,574
Interest expense	(416,803)	0
Other income (expense), net	5,964	(15,853)
Loss on warrant derivative liability	(184,272)	(1,871,294)
Net loss	$ (12,643,112)	$ (17,524,550)
Basic and diluted loss per share (in dollars per share)	$ (0.19)	$ (0.31)
Basic and diluted weighted-average shares outstanding (in shares)	66,488,855	55,722,710