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Loans Payable - Note 5 - SMOM - Additional Information (Detail) - USD ($)	May 04, 2017	May 10, 2012
Debt Instrument [Line Items]
Aggregate amount issuable		$ 8,000,000
Note 5 - SMOM [Member]
Debt Instrument [Line Items]
Aggregate amount issuable	$ 3,000,000
Interest rate, stated percentage	10.00%
Annual Principal Payment	$ 500,000
Note 5 - SMOM [Member] | Neptune Minerals, Inc. [Member]
Debt Instrument [Line Items]
Accounts receivable assigned for loan	50.00%
Accounts receivable, gross	$ 0
Note 5 - SMOM [Member] | Aldama Mining Company, S.de R.L. de C.V [Member]
Debt Instrument [Line Items]
Percentage of equity interest	10.00%
Value of equity interest	$ 1,000,000
Note 5 - SMOM [Member] | Aldama Mining Company, S.de R.L. de C.V [Member] | Maximum [Member]
Debt Instrument [Line Items]
Percentage of equity interest	50.00%

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