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Commitments and Contingencies - Additional Information (Detail) - USD ($) |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Aug. 21, 2020 | Mar. 11, 2015 | Mar. 31, 2016 | Sep. 30, 2020 | Sep. 30, 2020 | Dec. 31, 2019
Gain Contingencies [Line Items] |  |  |  |  |  |
Cash and cash equivalents |  |  |  | $ 9,107,736 | $ 9,107,736 | $ 213,389
Working capital deficit |  |  |  | 48,800,000 | 48,800,000 |
Total assets |  |  |  | 14,045,707 | 14,045,707 | $ 5,329,720
Lease Obligation |  |  |  | 482,887 | 482,887 |
Right Of Use Asset |  |  |  | $ 473,389 | $ 473,389 |
Annual increases of base rent |  |  |  | 3.00% | 3.00% |
Operating lease expense |  |  |  | $ 54,000 | $ 162,000 |
Sale of stock, Number of shares issued in transaction | 2,553,314 |  |  |  |  |
Class of warrant or right, Number of securities called by warrants or rights | 1,901,989 |  |  |  |  |
Offering costs paid on sale of common stock | $ 300,000 |  |  |  | 78,326 |
Net proceeds received from sale of stock | $ 11,300,000 |  |  |  | 11,315,000 |
Building [Member] |  |  |  |  |  |
Gain Contingencies [Line Items] |  |  |  |  |  |
Lease Obligation |  |  |  | $ 590,612 | $ 590,612 |
Rate Of Discount Used |  |  |  | 10.00% | 10.00% |
Tenure Of Lease Agreement |  |  |  | 5 years | 5 years |
Right Of Use Asset |  |  |  | $ 590,612 | $ 590,612 |
Corporate Office Space [Member] |  |  |  |  |  |
Gain Contingencies [Line Items] |  |  |  |  |  |
Lease Obligation |  |  |  | 170,999 | 170,999 |
Right Of Use Asset |  |  |  | 168,001 | $ 168,001 |
FLORIDA |  |  |  |  |  |
Gain Contingencies [Line Items] |  |  |  |  |  |
Effective Date Of Operating Lease Agreement |  |  |  |  | Oct. 01, 2019 |
Lease Obligation |  |  |  | $ 202,424 | $ 202,424 |
Rate Of Discount Used |  |  |  | 10.00% | 10.00% |
Tenure Of Lease Agreement |  |  |  | 5 years | 5 years |
Right Of Use Asset |  |  |  | $ 202,424 | $ 202,424 |
Penelope Mining LLC [Member] |  |  |  |  |  |
Gain Contingencies [Line Items] |  |  |  |  |  |
Investment in convertible preferred stock |  | $ 101,000,000 |  |  |  |
Investment agreement period |  | 3 years |  |  |  |
MINOSA [Member] |  |  |  |  |  |
Gain Contingencies [Line Items] |  |  |  |  |  |
Amount of debt financed |  | $ 14,750,000 |  |  |  |
Oceanica Resources S. de. R.L [Member] |  |  |  |  |  |
Gain Contingencies [Line Items] |  |  |  |  |  |
Grant and potential future issuance of new equity shares |  |  | 3,000,000 |  |  |
Maximum [Member] |  |  |  |  |  |
Gain Contingencies [Line Items] |  |  |  |  |  |
Consultants contingent success fees |  |  | $ 700,000 |  |  |
Maximum [Member] | Building [Member] |  |  |  |  |  |
Gain Contingencies [Line Items] |  |  |  |  |  |
Monthly Lease Payments |  |  |  |  | 13,269 |
Maximum [Member] | FLORIDA |  |  |  |  |  |
Gain Contingencies [Line Items] |  |  |  |  |  |
Monthly Lease Payments |  |  |  |  | 4,547 |
Minimum [Member] | Building [Member] |  |  |  |  |  |
Gain Contingencies [Line Items] |  |  |  |  |  |
Monthly Lease Payments |  |  |  |  | 11,789 |
Minimum [Member] | FLORIDA |  |  |  |  |  |
Gain Contingencies [Line Items] |  |  |  |  |  |
Monthly Lease Payments |  |  |  |  | $ 4,040 |

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