Consolidated Statements of Operations (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Statement [Abstract]
Licensing revenue	$ 19,107	$ 22,557	$ 38,214	$ 45,114
Total revenues	19,107	22,557	38,214	45,114
Operating Expenses:
Research and development	1,747,254	4,019,149	3,148,162	7,238,872
Selling, general and administrative	2,187,335	2,098,347	3,475,235	4,397,794
Total operating expenses	3,934,589	6,117,496	6,623,397	11,636,666
Loss from operations	(3,915,482)	(6,094,939)	(6,585,183)	(11,591,552)
Other Income (Expense):
Interest income	835	620	735	1,703
Interest expense	(243,829)	(242,078)	(487,069)	(3,415,859)
Gain on disposals of assets	1,500		1,500
Gain on revaluation of derivative warrant liability	393,000	2,995,000	533,000	4,675,986
Other income (expense), net	151,506	2,753,542	48,166	1,261,830
Net loss	$ (3,763,976)	$ (3,341,397)	$ (6,537,017)	$ (10,329,722)
Net loss per common share, basic and diluted	$ (0.31)	$ (0.51)	$ (0.55)	$ (1.73)
Basic and diluted weighted average common shares outstanding	12,070,548	6,594,530	11,965,306	5,987,376