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Tonogold Resources Inc. ("Tonogold") Securities (Details) |  |  |  |  |  | 3 Months Ended | 9 Months Ended | 14 Months Ended |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 02, 2020 USD ($) | Sep. 29, 2020 USD ($) $ / shares shares | Sep. 08, 2020 USD ($) $ / shares | Jul. 22, 2020 USD ($) shares | May 22, 2020 USD ($) day $ / shares shares | Sep. 30, 2020 USD ($) $ / shares shares | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) $ / shares shares | Sep. 30, 2019 USD ($) | Sep. 30, 2019 USD ($) shares | May 15, 2020 USD ($) | Mar. 20, 2020 USD ($) $ / shares | Dec. 31, 2019 USD ($) shares | Dec. 30, 2019 USD ($) | Dec. 19, 2019 USD ($) | Nov. 18, 2019 USD ($) | Oct. 14, 2019 USD ($) | Aug. 30, 2019 USD ($) | May 31, 2019 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of convertible preferred stock |  |  |  |  |  | $ 0 |  | $ 0 |  |  |  |  | $ 0 |  |  |  |  |  |
Common shares of Tonogold (in shares) | shares |  |  |  | 2,040,483 |  | 34,440,766 |  | 34,440,766 |  |  |  |  | 27,236,489 |  |  |  |  |  |
Number of shares sold (in shares) | shares |  |  |  | 2,040,483 |  | 3,450,138 |  |  |  | 2,327,400 |  |  |  |  |  |  |  |  |
Sale of stock, price per share (in dollars per share) | $ / shares |  |  |  |  |  | $ 0.40 |  | $ 0.40 |  |  |  |  |  |  |  |  |  |  |
Proceeds from the issuance of common stock |  |  |  | $ 1,250,000 |  | $ 1,400,000 |  | $ 4,197,622 | $ 3,835,867 | $ 1,700,000 |  |  |  |  |  |  |  |  |
Common stock, shares outstanding (in shares) | shares |  |  |  |  |  | 34,440,766 |  | 34,440,766 |  |  |  |  | 27,236,489 |  |  |  |  |  |
Issuance of common stock |  |  |  |  |  | $ 22,937 |  | $ 22,937 |  |  | $ 314,687 |  | $ 18,139 |  |  |  |  |  |
Principal amount |  |  | $ 4,475,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  | 4,765,254 |  | 4,765,254 |  |  |  |  | 5,412,074 |  |  |  |  |  |
Interest rate |  |  | 12.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notes receivable at fair value |  |  | $ 6,100,000 |  |  | 6,400,000 |  | 6,400,000 |  |  |  |  |  |  |  |  |  |  |
Change in fair value of contingent forward asset |  |  |  |  |  | $ (647,502) | $ 0 | $ 765,880 | $ 0 |  |  |  |  |  |  |  |  |  |
Private Placement Conversion Price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement input | $ / shares |  |  |  |  |  | 0.18 |  | 0.18 |  |  |  |  |  |  |  |  |  |  |
Convertible Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  | $ 5,475,000 |  | $ 5,475,000 |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  |  |  |  |  |  |  | 12.00% |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average conversion price (in dollars per share) | 120.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock redemption price | $ 2,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tonogold Resources, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of convertible preferred stock |  |  |  |  | $ 7,600,000 | $ 2,600,000 |  | $ 2,600,000 |  |  |  |  | 6,100,000 | $ 100,000 | $ 500,000 | $ 7,600,000 | $ 750,000 | $ 830,000 | $ 3,920,000
Threshold percentage of stock price trigger |  |  |  |  | 85.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Threshold consecutive trading days | day |  |  |  |  | 20 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Closing stock price (in dollars per share) | $ / shares |  | $ 0.18 |  |  | $ 0.18 | $ 0.39 |  | $ 0.39 |  |  |  |  |  |  |  |  |  |  |
Weighted average conversion price (in dollars per share) |  |  |  |  | 120.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in Tonogold shares (Note 3) |  |  | 7,607,263 |  |  | $ 9,722,022 |  | $ 9,722,022 |  |  |  |  | $ 0 |  |  |  |  |  |
Convertible preferred stock exchanged, amount |  | $ 2,800,000 |  |  | $ 1,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common shares of Tonogold (in shares) | shares |  | 15,666,667 |  |  | 6,111,111 | 21,777,778 |  | 21,777,778 |  |  |  |  |  |  |  |  |  |  |
Number of shares sold (in shares) | shares |  |  |  |  |  |  |  | 3,557,209 |  |  |  |  |  |  |  |  |  |  |
Proceeds from the issuance of common stock |  |  |  |  |  |  |  | $ 1,400,000 |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares outstanding (in shares) | shares |  |  |  |  |  | 2,200,000 |  | 2,200,000 |  |  |  |  |  |  |  |  |  |  |
Common stock, shares outstanding (in shares) | shares |  |  |  |  |  | 18,220,569 |  | 18,220,569 |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock |  |  |  |  |  | $ 7,100,000 |  | $ 7,100,000 |  |  |  |  |  |  |  |  |  |  |
Notes receivable at fair value |  |  | $ 6,141,497 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Change in fair value of contingent forward asset |  |  |  |  |  |  |  | $ 300,000 |  |  |  |  |  |  |  |  |  |  |
Tonogold Resources, Inc. | Common Share Price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement input | $ / shares |  |  | 0.35 |  |  | 0.39 |  | 0.39 |  |  |  | 0.35 |  |  |  |  |  |  |
Tonogold Resources, Inc. | Volatility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement input |  |  | 0.96 |  |  | 0.96 |  | 0.96 |  |  |  | 0.960 |  |  |  |  |  |  |
Tonogold Resources, Inc. | Risk-Free Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement input |  |  | 0.0015 |  |  | 0.0015 |  | 0.0015 |  |  |  | 0.0015 |  |  |  |  |  |  |
Tonogold Resources, Inc. | Cost of Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement input |  |  | 0.1112 |  |  | 0.1112 |  | 0.1112 |  |  |  | 0.1112 |  |  |  |  |  |  |
Tonogold Resources, Inc. | Private Placement Conversion Price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement input | $ / shares |  |  | 0.30 |  |  | 0.30 |  | 0.30 |  |  |  | 0.300 |  |  |  |  |  |  |
Tonogold Resources, Inc. | Probability of Prepayment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement input | $ / shares |  |  | 0.05 |  |  | 0.05 |  | 0.05 |  |  |  | 0.05 |  |  |  |  |  |  |
Tonogold Resources, Inc. | Probability of Change in Control |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement input |  |  | 0.05 |  |  | 0.05 |  | 0.05 |  |  |  | 0.05 |  |  |  |  |  |  |
Tonogold Resources, Inc. | Probability of Default |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement input |  |  | 0.27 |  |  | 0.27 |  | 0.27 |  |  |  | 0.27 |  |  |  |  |  |  |
Tonogold Resources, Inc. | Convertible Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  |  |  |  |  |  |  | $ 5,475,000 |  |  |  |  |  |  |
Long-term debt |  |  | $ 4,475,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  | 12.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tonogold Resources, Inc. | Convertible Debt | Change Of Control, Redemption Right |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption price percentage |  |  | 125.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tonogold Resources, Inc. | Convertible Debt | Default Redemption Right |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption price percentage |  |  | 118.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tonogold Resources, Inc. | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of convertible preferred stock | $ 2,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tonogold Resources, Inc. | Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in Tonogold shares (Note 3) |  |  |  |  | $ 7,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |

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