Condensed Statements of Operations (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Operating expenses:
Research and development	$ 2,095,149	$ 2,188,138	$ 4,110,225	$ 4,608,099
General and administrative	802,655	976,418	1,940,408	2,001,679
Total operating expenses	2,897,804	3,164,556	6,050,633	6,609,778
Loss from operations	(2,897,804)	(3,164,556)	(6,050,633)	(6,609,778)
Other expense	(72,694)	(76,607)	(145,274)	(152,133)
Net loss	$ (2,970,498)	$ (3,241,163)	$ (6,195,907)	$ (6,761,911)
Net loss per common share, basic and diluted	$ (0.41)	$ (0.52)	$ (0.86)	$ (1.10)
Weighted-average shares used to compute basic and diluted net loss per share	7,217,577	6,212,803	7,192,791	6,157,226