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Accounts Receivable - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2013
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Dec. 31, 2012
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Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable, net $ 207,005 $ 2,101,941
Reserves for doubtful accounts 5,131,593 4,820,593
Outstanding debt 8,227,675  
Dor Receivable [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Remaining amount of account receivable   4,820,593
London Bullion Market [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Revenue related to the remaining silver bullion   1,470,357
Neptune Minerals, Inc. [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Reserve balance 4,631,593  
Convertible note $ 500,000  
Gairsoppa [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Silver quantity 61 48