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Loans Payable - Note 5 - SMOM - Additional Information (Detail) - Note 5 - SMOM [Member] - USD ($)		3 Months Ended
	May 03, 2017	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Apr. 20, 2018
Debt Instrument [Line Items]
Aggregate amount issuable	$ 3,000,000				$ 3,500,000
Interest rate, stated percentage	10.00%
Annual Principal Payment	$ 500,000
Loan balance				$ 3,500,000
Accrued interest		$ 86,301	$ 73,973
Maximum [Member]
Debt Instrument [Line Items]
Convertible debt		$ 2,000,000
Neptune Minerals, Inc. [Member]
Debt Instrument [Line Items]
Accounts receivable assigned for loan	50.00%
Accounts receivable, gross	$ 0
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
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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