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Loans Payable - Note 5 - SMOM - Additional Information (Detail) - USD ($) |  | 3 Months Ended | 6 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
May 03, 2017 | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Jan. 31, 2021 | Dec. 31, 2020 | Apr. 20, 2018 | Mar. 31, 2018 | Oct. 01, 2016
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Aggregate amount issuable |  |  |  |  |  |  |  |  |  | $ 3,000,000.0
Note 5 - SMOM [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Aggregate amount issuable | $ 3,000,000.0 |  |  |  |  |  |  | $ 3,500,000 |  |
Interest rate, stated percentage | 10.00% |  |  |  |  |  |  |  |  |
Annual Principal Payment | $ 500,000 |  |  |  |  |  |  |  |  |
Loan balance |  | $ 3,500,000 |  | $ 3,500,000 |  |  |  |  |  |
Accrued interest |  | 157,069 | $ 87,260 | 312,421 | $ 174,520 |  |  |  |  |
Note 5 - SMOM [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Convertible debt |  | 2,000,000.0 |  | 2,000,000.0 |  |  |  |  |  |
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 | $ 1,000,000.0 |  |  |  |  |  |  |  |  |
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% |  |  |  |  |  |  |  |  |
Note 7 - Monaco 2018 [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Aggregate amount issuable |  | $ 1,099,366 |  | $ 1,099,366 |  |  | $ 1,099,366 |  |  |
Interest rate, stated percentage |  | 10.00% |  | 10.00% |  |  |  |  |  |
Loan balance |  |  |  |  |  |  |  |  | $ 1,000,000.0 |
Accrued interest |  | $ 68,583 | $ 35,018 | $ 133,476 | $ 67,794 |  |  |  |  |
Interest rate, increased percentage |  |  |  |  |  | 18.00% |  |  |  |

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