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Derivative Financial Instruments (Details 2) (USD $)
3 Months Ended 6 Months Ended 79 Months Ended
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Changes in warrants                  
Balance at the beginning of the period (in shares) 2,265,160 2,265,160 1,510,134 1,469,676 938,469 728,469 2,265,160 728,469  
New warrants issued during the quarter (in shares) 112,500   1,810,294 40,458 611,207 210,000      
Reclassification of derivative liability to equity during the quarter (in shares)     (1,055,268)            
Exercise of warrants during the quarter (in shares)         (80,000)        
Balance at the end of the period (in shares) 2,377,660 2,265,160 2,265,160 1,510,134 1,469,676 938,469 2,377,660 1,469,676 2,377,660
Changes in derivative instrument liability                  
Balance at the beginning of the period $ 3,317,168 $ 3,325,114 $ 3,860,838 $ 7,958,506 $ 5,139,347 $ 3,487,959 $ 3,325,114 $ 3,487,959  
Fair value of new warrants issued during the quarter 169,202   3,082,203 285,128 2,607,827 1,312,673      
Exercise of warrants during the quarter         (486,328)        
Reclassification of derivative liability to equity during the quarter     (1,707,317)            
Change in fair value of warrants during the quarter 1,317,347 (7,946) (1,910,610) (4,382,796) 697,660 338,715 1,309,401 1,036,375 (4,244,414)
Balance at the end of the period $ 4,803,717 $ 3,317,168 $ 3,325,114 $ 3,860,838 $ 7,958,506 $ 5,139,347 $ 4,803,717 $ 7,958,506 $ 4,803,717