Consolidated Statements of Operations (Unaudited) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Income Statement [Abstract]
Licensing revenue	$ 22,557	$ 30,927
Total revenues	22,557	30,927
Operating Expenses:
Research and development	3,219,723	1,391,645
Selling, general and administrative	2,299,447	1,859,404
Total operating expenses	5,519,170	3,251,049
Loss from operations	(5,496,613)	(3,220,122)
Other Income (Expense):
Interest income	1,083	2,959
Interest expense	(3,173,781)	(150)
Gain on revaluation of derivative warrant liability	1,680,986	231,543
Other income (expense), net	(1,491,712)	234,352
Net loss	$ (6,988,325)	$ (2,985,770)
Net loss per common share, basic and diluted	$ (0.13)	$ (0.08)
Basic and diluted weighted average common shares outstanding	53,734,767	38,742,976