Condensed Statements of Operations (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Operating expenses:
Research and development	$ 2,419,961	$ 1,852,116
General and administrative	1,025,261	1,070,479
Total operating expenses	3,445,222	2,922,595
Loss from operations	(3,445,222)	(2,922,595)
Other income (expense):
Interest income	1,522	4,055
Interest expense	(77,048)	(36,944)
Total other expense	(75,526)	(32,889)
Net loss	$ (3,520,748)	$ (2,955,484)
Net loss per common share, basic and diluted	$ (0.58)	$ (0.49)
Weighted-average shares used to compute basic and diluted net loss per share	6,103,783	6,002,936