Statements of Operations - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Operating expenses:
Research and development	$ 8,154,144	$ 9,991,855
General and administrative	3,664,159	3,158,179
Total operating expenses	11,818,303	13,150,034
Loss from operations	(11,818,303)	(13,150,034)
Other expense	(303,160)	(97,647)
Net loss	$ (12,121,463)	$ (13,247,681)
Net loss per common share, basic and diluted	$ (1.87)	$ (2.20)
Weighted-average shares used to compute basic and diluted net loss per share	6,485,794	6,032,560