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Tonogold Resources Inc. ("Tonogold") Purchase, Lease, and Option Agreements - Narrative (Details) |  |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |  |  |  |  |
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Sep. 08, 2020 USD ($) $ / shares | May 22, 2020 USD ($) day $ / shares | May 05, 2020 | Mar. 20, 2020 USD ($) $ / shares | Dec. 23, 2019 USD ($) | Nov. 18, 2019 USD ($) $ / T | Sep. 16, 2019 USD ($) | Jan. 31, 2019 USD ($) | Sep. 30, 2020 USD ($) $ / shares numberOfAgreement | Mar. 31, 2020 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) $ / shares numberOfAgreement | Sep. 30, 2019 USD ($) | Sep. 29, 2020 $ / shares | Dec. 31, 2019 USD ($) | Dec. 30, 2019 USD ($) | Dec. 19, 2019 USD ($) | Oct. 14, 2019 USD ($) | Aug. 30, 2019 USD ($) | May 31, 2019 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from deposits on Membership Interest Purchase Agreement (Note 20) |  |  |  |  |  |  |  |  |  |  |  | $ 1,140,000 | $ 3,925,000 |  |  |  |  |  |  |
Issuance of convertible preferred stock |  |  |  |  |  |  |  |  | $ 0 |  |  | $ 0 |  |  | $ 0 |  |  |  |  |
Net smelter return percentage |  |  |  |  |  |  |  |  |  |  |  | 3.00% |  |  |  |  |  |  |  |
Proceeds from non refundable deposits | $ 140,000 |  |  |  |  |  |  | $ 1,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |
Interest rate | 12.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  | 4,765,254 |  |  | $ 4,765,254 |  |  | 5,412,074 |  |  |  |  |
Initial value of contingent forward |  |  |  | $ 1,200,000 |  |  |  |  |  | $ 1,232,952 |  |  |  |  |  |  |  |  |  |
Contingent forward asset - fair value on settlement date | $ 2,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount | 4,475,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |
Term of mineral lease |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Quarterly rental fee |  |  |  |  |  |  | $ 10,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Quarterly rental fee, increase in percentage |  |  |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum payments under commitment |  |  |  |  | $ 20,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Renewal term of mineral lease |  |  | 15 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Drill program cost | 7,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Advanced expense reimbursement |  |  |  |  |  |  |  |  |  |  |  | 2,300,000 |  |  |  |  |  |  |  |
Deposits (Note 10) |  |  |  |  |  |  |  |  | 498,122 |  |  | 498,122 |  |  | 318,384 |  |  |  |  |
Prepaid Tonogold expense reimbursements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deposits (Note 10) |  |  |  |  |  |  |  |  | 78,855 |  |  | 78,855 |  |  | 0 |  |  |  |  |
Reimbursement, Interest Expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Advanced expense reimbursement |  |  |  |  |  |  |  |  |  |  |  | 2,200,000 |  |  |  |  |  |  |  |
Exploration Expenditures, First Term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum payments under commitment |  |  |  |  | 5,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration Expenditures, Second Term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum payments under commitment |  |  |  |  | 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum payments under commitment, Annual |  |  |  |  | $ 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other Income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Change in fair value of contingent forward asset |  |  |  |  |  |  |  |  | $ 300,000 |  |  | $ 300,000 |  |  |  |  |  |  |  |
Private Placement Conversion Price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement input | $ / shares |  |  |  |  |  |  |  |  | 0.18 |  |  | 0.18 |  |  |  |  |  |  |  |
Convertible Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  | 12.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  | $ 5,475,000 |  |  | $ 5,475,000 |  |  |  |  |  |  |  |
Storey County, Nevada | Tonogold Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net smelter return percentage |  |  |  |  |  |  | 3.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Term of mineral lease |  |  |  |  | 20 years |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |
Net smelter return royalty percentage, after year one |  |  |  |  |  |  | 1.50% |  |  |  |  |  |  |  |  |  |  |  |  |
Storey County, Nevada | Tonogold Agreement | Exploration Expenditures, First Term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial exploration term |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Storey County, Nevada | Tonogold Agreement | Exploration Expenditures, Second Term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Renewal term of mineral lease |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Storey County, Nevada | Tonogold Agreement | Exploration Expenditures, Third Term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Renewal term of mineral lease |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
American Flat Property | Lease Option Agreement | Phase 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual reimbursements under facility lease |  |  |  |  |  | $ 1,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual rental income under processing facility |  |  |  |  |  | $ 1,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rental fee per ton processed | $ / T |  |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Potential rental income under processing facility lease |  |  |  |  |  | $ 15,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
American Flat Property | Lease Option Agreement | Phase 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual rental income under processing facility |  |  |  |  |  | $ 1,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rental fee per ton processed | $ / T |  |  |  |  |  | 0.50 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Potential rental income under processing facility lease |  |  |  |  |  | $ 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lucerne Mine (Mineral rights and properties) (Note 20) | Tonogold Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net smelter return percentage |  |  |  |  |  | 1.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tonogold Resources, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of counterparty agreements | numberOfAgreement |  |  |  |  |  |  |  |  | 3 |  |  | 3 |  |  |  |  |  |  |  |
Proceeds from deposits on Membership Interest Purchase Agreement (Note 20) | 7,065,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of convertible preferred stock |  | $ 7,600,000 |  |  |  | $ 7,600,000 |  |  | $ 2,600,000 |  |  | $ 2,600,000 |  |  | 6,100,000 | $ 100,000 | $ 500,000 | $ 750,000 | $ 830,000 | $ 3,920,000
Consideration received | 18,814,928 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net gain on sale | 18,275,846 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Threshold percentage of stock price trigger |  | 85.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Threshold consecutive trading days | day |  | 20 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Closing stock price (in dollars per share) | $ / shares |  | $ 0.18 |  |  |  |  |  |  | $ 0.39 |  |  | $ 0.39 |  | $ 0.18 |  |  |  |  |  |
Weighted average conversion price (in dollars per share) |  | 120.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent forward asset - fair value on settlement date | 1,998,832 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notes receivable at fair value | $ 6,141,497 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Change in fair value of contingent forward asset |  |  |  |  |  |  |  |  |  |  |  | $ 300,000 |  |  |  |  |  |  |  |
Tonogold Resources, Inc. | Common Share Price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement input | $ / shares | 0.35 |  |  | 0.35 |  |  |  |  | 0.39 |  |  | 0.39 |  |  |  |  |  |  |  |
Tonogold Resources, Inc. | Volatility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement input | 0.96 |  |  | 0.960 |  |  |  |  | 0.96 |  |  | 0.96 |  |  |  |  |  |  |  |
Tonogold Resources, Inc. | Risk-Free Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement input | 0.0015 |  |  | 0.0015 |  |  |  |  | 0.0015 |  |  | 0.0015 |  |  |  |  |  |  |  |
Tonogold Resources, Inc. | Private Placement Conversion Price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement input | $ / shares | 0.30 |  |  | 0.300 |  |  |  |  | 0.30 |  |  | 0.30 |  |  |  |  |  |  |  |
Tonogold Resources, Inc. | Probability of Prepayment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement input | $ / shares | 0.05 |  |  | 0.05 |  |  |  |  | 0.05 |  |  | 0.05 |  |  |  |  |  |  |  |
Tonogold Resources, Inc. | Probability of Change in Control |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement input | 0.05 |  |  | 0.05 |  |  |  |  | 0.05 |  |  | 0.05 |  |  |  |  |  |  |  |
Tonogold Resources, Inc. | Cost of Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement input | 0.1112 |  |  | 0.1112 |  |  |  |  | 0.1112 |  |  | 0.1112 |  |  |  |  |  |  |  |
Tonogold Resources, Inc. | Probability of Default |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement input | 0.27 |  |  | 0.27 |  |  |  |  | 0.27 |  |  | 0.27 |  |  |  |  |  |  |  |
Tonogold Resources, Inc. | Convertible Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate | 12.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt | $ 4,475,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  | $ 5,475,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tonogold Resources, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from deposits on Membership Interest Purchase Agreement (Note 20) |  |  |  |  |  | $ 6,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of convertible preferred stock |  |  |  |  |  |  |  |  | $ 6,100,000 |  |  | $ 6,100,000 |  |  | $ 6,100,000 |  |  |  |  |
Tonogold Resources, Inc. | Convertible Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount | $ 4,475,000 |  |  | $ 5,475,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Comstock Mining LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  | $ 4,700,000 |  |  | $ 4,700,000 |  |  |  |  |  |  |  |
Comstock Mining LLC | Tonogold Resources, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Membership interest | 100.00% |  |  | 50.00% |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |

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