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Fair Value of Financial Instruments (Details) (USD $)
3 Months Ended 9 Months Ended 1 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Dec. 31, 2010
Jul. 02, 2010
Oct. 31, 2009
October 2009 [Member]
Derivatives, Fair Value [Line Items]                
Common stock, shares authorized under plan, in shares 87,543,781   87,543,781   87,367,313     10,900,000
Warrants to purchase common stock, in shars               5,450,000
Common stock warrant liability $ 2,769,277 $ 5,935,171 $ 2,769,277 $ 5,935,171 $ 8,168,846 $ 9,286,906    
Change in fair value of stock warrants (1,065,498) 5,050,520 5,399,569 2,790,337        
Retirement of warrant liability     0 561,398        
Common stock, price-per-share             $ 2.00  
Warrants and Rights Outstanding           $ 13,471,832 $ 5,509,893