Consolidated Statements of Operations (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Income Statement [Abstract]
Licensing revenue	$ 30,927	$ (44,360)	$ 92,781	$ 198,550
Other revenue				145,152
Total revenues	30,927	(44,360)	92,781	343,702
Operating Expenses:
Research and development	2,139,465	695,019	5,731,417	2,557,118
Selling, general and administrative	1,508,069	1,527,317	4,702,325	3,427,582
Total operating expenses	3,647,534	2,222,336	10,433,742	5,984,700
Loss from operations	(3,616,607)	(2,266,696)	(10,340,961)	(5,640,998)
Other Income (Expense):
Interest income	635	581	5,150	3,870
Interest expense	(89,123)	(385)	(89,407)	(13,739)
Debt financing costs	(160,000)		(160,000)
Loss on extinguishment of debt/payables				(1,514)
Gain (loss) on disposals of assets			(21,272)	834
Gain (loss) on revaluation of derivative warrant liability	(400,000)	893,229	201,281	(2,258,679)
Other income (expense), net	(648,488)	893,425	(64,248)	(2,269,228)
Net loss	(4,265,095)	(1,373,271)	(10,405,209)	(7,910,226)
Deemed dividend on beneficial conversion feature of Series D Convertible Preferred Stock				(1,975,211)
Deemed dividend on repricing of warrants		(87,500)		(87,500)
Accretion of dividends on Convertible Perpetual Redeemable Preferred Stock		(49,519)		(142,761)
Net loss applicable to common shareholders	$ (4,265,095)	$ (1,510,290)	$ (10,405,209)	$ (10,115,698)
Net loss per common share, basic and diluted	$ (0.11)	$ (0.04)	$ (0.27)	$ (0.30)
Basic and diluted weighted average common shares outstanding	39,858,876	34,295,425	39,256,372	33,620,751