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Notes Payable (Details) (USD $)
Mar. 31, 2013
Dec. 31, 2012
Notes payable    
Total Debt $ 22,438,404 $ 21,580,252
Long-term Notes Payable 22,438,404 21,580,252
Revenue Interest Purchase Agreement [Member]
   
Notes payable    
Total Debt $ 22,438,404 $ 21,580,252