Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues	$ 2,500	$ 5,000	$ 7,917	$ 14,167
Operating expenses:
Research and development expenses	3,392,086	2,109,880	9,887,750	5,747,922
General and administrative expenses	1,807,934	2,001,865	4,925,389	7,061,129
Total operating expenses	5,200,020	4,111,745	14,813,139	12,809,051
Operating loss	(5,197,520)	(4,106,745)	(14,805,222)	(12,794,884)
Other income (expense):
Interest income	24,149	13,127	53,802	55,267
Interest expense	(464,197)	(361,619)	(1,377,004)	(1,191,976)
Warrant modification expense	0	0	0	(3,109,850)
Loss from change in fair value of derivative instruments	0	0	0	(334,133)
Other income (expense)	0	0	(10,326)	250,000
Total other income (expense)	(440,048)	(348,492)	(1,333,528)	(4,330,692)
Net loss	$ (5,637,568)	$ (4,455,237)	$ (16,138,750)	$ (17,125,576)
Net loss per share - basic and diluted (in dollars per share)	$ (0.06)	$ (0.05)	$ (0.18)	$ (0.2)
Weighted average common shares outstanding - basic and diluted (in shares)	91,569,826	87,366,234	90,532,073	86,777,197
Comprehensive loss:
Net loss	$ (5,637,568)	$ (4,455,237)	$ (16,138,750)	$ (17,125,576)
Foreign currency translation adjustment	(2,275)	3	(2,280)	(1,131)
Comprehensive loss	$ (5,639,843)	$ (4,455,234)	$ (16,141,030)	$ (17,126,707)