Consolidated Statements of Operations (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Revenue:
Option Revenue	$ 1,271,895	$ 1,266,611
Research and development	12,118,629	9,181,090
General and administrative	3,833,370	3,670,769
Depreciation	387,779	335,597
Loss on disposal of fixed assets	0	2,161
Operating loss	(15,067,883)	(11,923,006)
Interest income	15,456	14,985
Other income and expense, net	2,147	37,910
Loss on extinguishment of debt	0	(2,518,912)
Interest expense	(1,983)	(2,267,302)
Net loss	$ (15,052,263)	$ (16,656,325)
Basic and diluted loss per share	$ (0.54)	$ (1.25)
Weighted average shares outstanding	27,821,056	13,332,350