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Accounts Receivable - Additional Information (Detail) - USD ($)
Jun. 30, 2016
Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Reserves for doubtful accounts $ 2,315,797 $ 2,315,797
Monaco [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable 501,228 $ 629,400
Neptune Minerals, Inc. [Member] | Monaco [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of accounts receivable   50.00%
Reserves for doubtful accounts 2,315,797 $ 2,315,797
Other Customer [Member] | Monaco [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Reserves for doubtful accounts $ 1,018,732 $ 1,018,732