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Interim Financial Statements - Narrative (Details) |  |  |  |  |  | 1 Months Ended | 2 Months Ended | 3 Months Ended | 9 Months Ended | 14 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  |  |
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Oct. 02, 2020 USD ($) | Sep. 29, 2020 USD ($) shares | Jul. 22, 2020 USD ($) $ / shares shares | May 22, 2020 USD ($) shares | Nov. 28, 2019 | Jul. 31, 2020 USD ($) shares | Sep. 23, 2020 USD ($) $ / shares shares | Sep. 30, 2020 USD ($) $ / shares shares | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Sep. 30, 2019 USD ($) $ / shares shares | Jun. 30, 2019 USD ($) shares | Mar. 31, 2019 USD ($) | Sep. 30, 2020 USD ($) $ / shares shares | Sep. 30, 2019 USD ($) $ / shares shares | Sep. 30, 2019 USD ($) $ / shares shares | Oct. 09, 2020 USD ($) | Sep. 08, 2020 USD ($) | Aug. 06, 2020 USD ($) | May 15, 2020 USD ($) | Apr. 30, 2020 USD ($) | Dec. 31, 2019 USD ($) shares | Dec. 30, 2019 USD ($) | Dec. 19, 2019 USD ($) | Nov. 18, 2019 USD ($) | Oct. 14, 2019 USD ($) | Aug. 30, 2019 USD ($) | May 31, 2019 USD ($) | Feb. 28, 2019 USD ($) | Feb. 18, 2019 USD ($)
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated deficit |  |  |  |  |  |  |  | $ 217,548,201 |  |  |  |  |  | $ 217,548,201 |  |  |  |  |  |  |  | $ 235,890,272 |  |  |  |  |  |  |  |
Net income (loss) |  |  |  |  |  |  |  | 17,330,062 | $ 1,275,986 | $ (263,212) | $ 386,897 | $ (2,077,744) | $ (1,835,065) | 18,342,836 | $ (3,525,912) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash used in operating activities |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,409,947 | 2,282,511 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  |  |  |  | 1,677,233 |  |  |  |  |  | 1,677,233 |  |  |  |  |  |  |  | 1,015,857 |  |  |  |  |  |  |  |
Convertible preferred stock exchanged, amount |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of convertible preferred stock |  |  |  |  |  |  |  | $ 0 |  |  |  |  |  | $ 0 |  |  |  |  |  |  |  | $ 0 |  |  |  |  |  |  |  |
Common stock, shares issued (in shares) | shares |  |  | 2,040,483 |  |  |  |  | 34,440,766 |  |  |  |  |  | 34,440,766 |  |  |  |  |  |  |  | 27,236,489 |  |  |  |  |  |  |  |
Proceeds from the issuance of common stock |  |  | $ 1,250,000 |  |  |  |  | $ 1,400,000 |  |  |  |  |  | $ 4,197,622 | $ 3,835,867 | $ 1,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued in transaction (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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |
Notes receivable |  |  |  |  |  |  |  | 4,500,000 |  |  |  |  |  | $ 4,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notes receivable interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  | 12.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  | 4,765,254 |  |  |  |  |  | $ 4,765,254 |  |  |  |  |  |  |  | $ 5,412,074 |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,475,000 |  |  |  |  |  |  |  |  |  |  |  |
Common stock, aggregate offering agreement, share value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 50,000,000
Common stock, aggregate offering agreement, used capacity |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, aggregate offering agreement, unused capacity |  |  |  |  |  |  |  | 41,800,000 |  |  |  |  |  | 41,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, aggregate offering agreement, unrestricted share value |  |  |  |  |  |  |  | $ 10,500,000 |  |  |  |  |  | $ 10,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average price per share (in dollars per share) | $ / shares |  |  | $ 0.61 |  |  |  |  |  |  |  | $ 0.74 |  |  |  | $ 0.74 | $ 0.74 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock, shares issued (in shares) | shares |  |  |  |  |  |  |  | 0 |  |  |  | 1,274 |  | 0 |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |
Common shares issued on conversion (in shares) | shares |  |  |  |  |  |  |  |  |  |  | 2,240,441 |  |  |  | 2,240,441 | 2,240,441 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible instruments outstanding |  |  |  |  |  |  |  | $ 0 |  |  |  |  |  | $ 0 |  |  |  |  |  |  |  | $ 0 |  |  |  |  |  |  |  |
Reverse stock split ratio |  |  |  |  | 0.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Effective income tax rate |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2019 Equity Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Authorized amount of stock available for sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 50,000,000 |
Paycheck Protection Program grant |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 300,000 |  |  |  |  |  |  |  |  |
Three Promissory Notes | Unsecured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  | 4,500,000 |  |  |  |  |  | $ 4,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,475,000 |  |  |  |  |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock redemption price | $ 2,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average conversion price (in dollars per share) | 120.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event | Three Promissory Notes | Unsecured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Comstock Mining LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  | $ 4,700,000 |  |  |  |  |  | $ 4,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pelen LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest percentage |  |  |  |  |  |  |  | 25.00% |  |  |  |  |  | 25.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Triton |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from the issuance of common stock |  |  | $ 1,250,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate offering price, up to |  |  |  |  |  | $ 1,250,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average price per share (in dollars per share) | $ / shares |  |  | $ 0.61 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Leviston Resources LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from the issuance of common stock |  |  |  |  |  |  | $ 2,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued in transaction (in shares) | shares |  |  |  |  |  |  | 2,793,586 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate offering price, up to |  |  |  |  |  | $ 2,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average price per share (in dollars per share) | $ / shares |  |  |  |  |  |  | $ 0.89 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fee percentage paid to issuance common stock |  |  |  |  |  | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued to paid fee (in shares) | shares |  |  |  |  |  | 173,611 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, commitment fee value |  |  |  |  |  | $ 125,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tonogold Resources, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of membership interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |
Convertible preferred stock exchanged, amount |  | $ 2,820,000 |  | $ 1,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 |  |
Common stock, shares issued (in shares) | shares |  | 15,666,667 |  | 6,111,111 |  |  |  | 21,777,778 |  |  |  |  |  | 21,777,778 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from the issuance of common stock |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued in transaction (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,557,209 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares outstanding (in shares) | shares |  |  |  |  |  |  |  | 18,220,569 |  |  |  |  |  | 18,220,569 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock |  |  |  |  |  |  |  | $ 7,100,000 |  |  |  |  |  | $ 7,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average conversion price (in dollars per share) |  |  |  | 120.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock, shares issued (in shares) | shares |  | 2,820 |  | 1,100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tonogold Resources, Inc. | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of convertible preferred stock | $ 2,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Murray FO | 2019 Equity Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Authorized amount of stock available for sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,000,000 |
Discount to the volume weighted average sales price of aggregate offering price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10.00% |
Tonogold Resources, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of convertible preferred stock |  |  |  |  |  |  |  | $ 6,100,000 |  |  |  |  |  | $ 6,100,000 |  |  |  |  |  |  |  | $ 6,100,000 |  |  |  |  |  |  |  |
Tonogold Resources, Inc. | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock redemption price | 2,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redeemed CPS for cash | $ 2,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average conversion price (in dollars per share) | 120.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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