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Derivative Financial Instruments (Details 6) (Derivatives Warrant [Member], USD $)
9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Derivatives Warrant [Member]
   
Changes in fair value inputs and assumptions    
Balance at January 1 $ 4,653,160 $ 2,287,800
Issuances 363,542 906,150
Changes in fair value inputs and assumptions reflected in income (379,114) 139,275
Balances at September 30 $ 4,637,588 $ 3,333,225