Statements of Operations and Comprehensive Loss - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Revenues	$ 0	$ 0	$ 0	$ 0
Operating expenses:
Research and development	1,100,906	21,241,640	1,239,875	21,291,640
General and administrative	1,526,008	513,991	1,848,079	673,729
Total operating expenses	2,626,914	21,755,631	3,087,954	21,965,369
Loss from operations	(2,626,914)	(21,755,631)	(3,087,954)	(21,965,369)
Other expenses:
Change in fair value of accrued license fees	4,421,338	959,363	9,381,848	959,363
Change in fair value of debt conversion feature liability	546,485	(2,328)	629,141	7,921
Amortization of debt discount	240,515	60,603	412,471	66,982
Interest expense, net	29,814	9,518	65,067	12,094
Total other expenses	5,238,152	1,027,156	10,488,527	1,046,360
Net loss	(7,865,066)	(22,782,787)	(13,576,481)	(23,011,729)
Other comprehensive loss, net of tax:
Unrealized loss on securities	(12,461)		(12,461)
Comprehensive loss	$ (7,877,527)	$ (22,782,787)	$ (13,588,942)	$ (23,011,729)
Basic and diluted net loss per share	$ (1.07)	$ (5.40)	$ (2.38)	$ (6.20)
Weighted-average shares used to compute basic and diluted net loss per share	7,331,861	4,221,757	5,711,735	3,709,557