Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenues	$ 2,500	$ 2,917
Operating expenses:
Research and development expenses	3,065,590	3,182,823
General and administrative expenses	3,170,522	1,433,074
Total operating expenses	6,236,112	4,615,897
Operating loss	(6,233,612)	(4,612,980)
Other income (expense):
Interest income	11,136	13,569
Interest expense	(386,506)	(453,734)
Other income	3,199	0
Total other income (expense)	(372,171)	(440,165)
Net loss	$ (6,605,783)	$ (5,053,145)
Net loss per share - basic and diluted (in dollars per share)	$ (0.07)	$ (0.06)
Weighted average common shares outstanding - basic and diluted (in shares)	92,009,782	89,654,634
Comprehensive loss:
Net loss	$ (6,605,783)	$ (5,053,145)
Foreign currency translation adjustment	(1,773)	13
Comprehensive loss	$ (6,607,556)	$ (5,053,132)