Consolidated Statements of Operations (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Income Statement [Abstract]
Licensing revenue	$ 30,927	$ 121,455	$ 61,854	$ 242,910
Other revenue		37,065		145,152
Total revenues	30,927	158,520	61,854	388,062
Operating Expenses:
Research and development	2,200,307	996,149	3,591,952	1,862,099
Selling, general and administrative	1,334,852	978,150	3,194,256	1,900,265
Total operating expenses	3,535,159	1,974,299	6,786,208	3,762,364
Loss from operations	(3,504,232)	(1,815,779)	(6,724,354)	(3,374,302)
Other Income (Expense):
Interest income	1,556	1,210	4,515	3,289
Interest expense	(134)	(604)	(284)	(13,354)
Loss on extinguishment of debt/payables				(1,514)
Gain (loss) on disposals of assets	(21,272)	(2,531)	(21,272)	834
Derivative warrant liability gain (loss)	369,738	(122,011)	601,281	(3,151,908)
Other income (expense), net	349,888	(123,936)	584,240	(3,162,653)
Net loss	(3,154,344)	(1,939,715)	(6,140,114)	(6,536,955)
Deemed dividend on beneficial conversion feature of Series D Convertible Preferred Stock				(1,975,211)
Accretion of dividends on Convertible Perpetual Redeemable Preferred Stock		(47,558)		(93,242)
Net loss applicable to common shareholders	$ (3,154,344)	$ (1,987,273)	$ (6,140,114)	$ (8,605,408)
Net loss per common share, basic and diluted	$ (0.08)	$ (0.06)	$ (0.16)	$ (0.26)
Basic and diluted weighted average common shares outstanding	39,160,643	33,911,459	38,951,809	33,277,823