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Accounts Receivable - Summary of Accounts Receivable (Detail) (USD $)
Sep. 30, 2014
Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Reserve for doubtful accounts receivable $ (4,631,593) $ (5,131,593)
Accounts receivable, net 6,420,437 207,005
Trade [Member]
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable, gross 11,003,444 4,808,678
Other [Member]
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable, gross $ 48,586 $ 529,920