Condensed Statements of Operations - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Operating expenses:
Research and development	$ 2,188,138	$ 2,874,977	$ 4,608,099	$ 4,727,093
General and administrative	976,418	616,888	2,001,679	1,687,367
Total operating expenses	3,164,556	3,491,865	6,609,778	6,414,460
Loss from operations	(3,164,556)	(3,491,865)	(6,609,778)	(6,414,460)
Other income (expense):
Interest income	1,129	3,215	2,651	7,270
Interest expense	(77,736)	(58,390)	(154,784)	(95,334)
Total other expense	(76,607)	(55,175)	(152,133)	(88,064)
Net loss	$ (3,241,163)	$ (3,547,040)	$ (6,761,911)	$ (6,502,524)
Net loss per common share, basic and diluted	$ (0.52)	$ (0.59)	$ (1.10)	$ (1.08)
Weighted-average shares used to compute basic and diluted net loss per share	6,212,803	6,027,672	6,157,226	6,015,310