Condensed Consolidated Statements of Operations (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Licensing revenue	$ 125,000	$ 125,000	$ 375,000	$ 375,000
Operating expenses:
Research and development	4,629,628	2,269,228	10,688,269	7,494,981
General and administrative	2,044,163	1,389,539	6,783,228	5,028,988
Acquisition costs	119,996		1,187,263
Total operating expenses	6,793,787	3,658,767	18,658,760	12,523,969
Loss from operations	(6,668,787)	(3,533,767)	(18,283,760)	(12,148,969)
Other (expense) income:
Gain (loss) from change in valuation of common stock warrant liability	96,830	(518,843)	81,243	8,141,574
Investment income, net	26,515	144,532	57,268	228,227
Interest expense	(418,711)	(162,774)	(912,539)	(519,913)
Other income (expense)	21,807	(669)	19,319	(2,530)
Total other (expense) income, net	(273,559)	(537,754)	(754,709)	7,847,358
Net loss	(6,942,346)	(4,071,521)	(19,038,469)	(4,301,611)
Non-cash deemed dividend from beneficial conversion feature on convertible preferred stock				(4,601,410)
Net loss attributable to common shareholders	$ (6,942,346)	$ (4,071,521)	$ (19,038,469)	$ (8,903,021)
Basic and diluted (in Dollars per share)	$ (0.35)	$ (0.30)	$ (1.06)	$ (0.76)
Basic and diluted (in Shares)	19,964,389	13,601,800	17,948,841	11,755,611