Condensed Consolidated Statements of Comprehensive Loss (Unaudited) (USD $)
 3 Months Ended 6 Months Ended 236 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Condensed Consolidated Statements of Comprehensive Loss [Abstract]          
Revenue $ 250,000   $ 500,000   $ 1,400,000
Operating expenses:          
General and administrative 418,676 571,282 865,039 1,168,879 69,679,927
Research and development 20,545 58,358 41,239 83,954 116,082,837
Purchased in-process research and development         12,146,544
Operating expenses before accrual reversal 439,221 629,640 906,278 1,252,833 197,909,308
Accrual reversal   (561,196)   (561,196) (561,195)
Total operating expenses 439,221 68,444 906,278 691,637 197,348,113
Loss from operations (189,221) (68,444) (406,278) (691,637) (195,948,113)
Interest expense (105,716) (465,258) (209,113) (919,009) (14,698,223)
Investment income 29 166 277 499 7,705,281
Other income (expense), net     905   (1,473,159)
Gain on early extinguishment of debt         6,277,100
Forgiveness of debt         476,837
Net loss (294,908) (533,536) (614,209) (1,610,147) (197,660,277)
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 attributable to common stockholders (294,908) (533,536) (614,209) (1,610,147) (206,952,578)
Other comprehensive income Net change in unrealized loss on marketable securities (12,938)   (7,057)   (7,057)
Comprehensive loss $ (307,846) $ (533,536) $ (621,266) $ (1,610,147) $ (206,959,635)
Basic and diluted net loss attributable to common stockholders per share $ (0.01) $ (0.02) $ (0.02) $ (0.06)  
Weighted average common shares outstanding 30,635,720 28,302,129 30,635,720 27,548,076