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Accounts Receivable and Other, Net - Additional Information (Detail) - Related Party [Member] - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable $ 216,603 $ 664,596
Neptune Minerals, Inc. [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable $ 216,603 $ 52,098