Consolidated Statements of Comprehensive Loss (USD $)	12 Months Ended		254 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013
Income Statement [Abstract]
Revenues	$ 473,730	$ 530,720	$ 1,904,450
Operating expenses:
General and administrative	1,419,792	1,665,605	71,902,285
Research and development		50,750	116,092,348
Sublicense and option fees	23,687	26,536	50,223
Purchased in-process research and development			12,146,544
Operating expenses before accrual reversal	1,443,479	1,742,891	200,191,400
Accrual reversal	(405,026)		(966,221)
Total operating expenses	1,038,453	1,742,891	199,225,179
Loss from operations	(564,723)	(1,212,171)	(197,320,729)
Interest expense	(454,662)	(434,551)	(15,378,323)
Investment income	819	341	7,706,164
Realized loss on sale of marketable securities	(263,154)		(263,154)
Other income (expense), net	340,191	905	(1,132,968)
Gain on early extinguishment of debt			6,277,100
Forgiveness of debt			476,837
Net loss	(941,529)	(1,645,476)	(199,635,073)
Preferred stock beneficial conversion feature			(8,062,712)
Accrual of preferred stock dividends and modification of warrants held by preferred stock stockholders			(1,229,589)
Net loss	(941,529)	(1,645,476)	(208,927,374)
Other comprehensive income (loss)
Unrealized holding gain (loss) arising during the year	52,700	(277,837)	(256,504)
Less: reclassification adjustments for loss on sale included in net loss	(263,154)		(263,154)
Total other comprehensive income (loss)	315,854	(277,837)	6,650
Comprehensive loss	$ (625,675)	$ (1,923,313)	$ (208,920,724)
Net loss per common share, basic and diluted	$ (0.03)	$ (0.06)
Weighted average common shares outstanding, basic and diluted	30,635,720	30,635,720