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Commitments and Contigencies (Details Textual) ozt in Millions |  |  | 3 Months Ended | 9 Months Ended | 36 Months Ended |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 01, 2027 | Oct. 02, 2014 USD ($) | Sep. 30, 2024 USD ($) shares | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) shares | Sep. 30, 2023 USD ($) | Dec. 31, 2026 | Mar. 28, 2025 USD ($) | Jun. 30, 2024 USD ($) | Apr. 03, 2024 shares | Apr. 02, 2024 USD ($) | Mar. 28, 2024 ozt shares | Feb. 26, 2024 shares | Dec. 31, 2023 USD ($) shares | Jun. 30, 2023 USD ($) | Dec. 31, 2022 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valued-added Tax Outstanding |  |  | $ 26,900,000 |  | $ 26,900,000 |  |  |  |  |  |  |  |  |  |  |
Revenue Recognized |  |  | $ 130,000 | $ 143,000 | $ 55,407,000 | $ 25,358,000 |  |  |  |  |  |  |  |  |  |
Common stock, shares issued (in shares) | shares |  |  | 399,287,506 |  | 399,287,506 |  |  |  |  |  |  |  | 7,704,725 | 386,282,957 |  |
Common stock fair value |  |  | $ 3,993,000 |  | $ 3,993,000 |  |  |  |  |  |  |  |  | $ 3,863,000 |  |
Surety Bonds Outstanding |  |  | 349,500,000 |  | 349,500,000 |  |  |  |  |  |  |  |  | 324,800,000 |  |
Kensington Royalty Matter | Settled Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty payment | ozt |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |
Common stock, shares issued (in shares) | shares |  |  |  |  |  |  |  |  |  | 737,210 |  |  |  |  |  |
Common stock fair value |  |  |  |  |  |  |  |  |  |  | $ 3,000,000 |  |  |  |  |
Kensington Royalty Matter | Settled Litigation | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty payment rate | 1.50% |  |  |  |  |  | 1.25% |  |  |  |  |  |  |  |  |
Common stock fair value |  |  |  |  |  |  |  | $ 3,750,000 |  |  |  |  |  |  |  |
Maximum | Kensington Royalty Matter | Settled Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares issued (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  | 2,455,000 |  |  |  |
Palmarejo gold production royalty |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Production to be sold, percent |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Price per ounce under agreement |  | $ 800 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate deposit to be received |  | $ 22,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Franco-Nevada Gold Stream Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Production to be sold, percent |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration |  | $ 78,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire businesses, gross |  | 75,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common shares issued (value) |  | $ 3,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Kensington |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue Recognized |  |  | (43,030,000) | (31,000,000) | (140,035,000) | (56,000,000) |  |  |  |  |  |  |  |  |  |
Revenue liability |  |  | 55,080,000 | 44,323,000 | 55,080,000 | 44,323,000 |  |  | $ 43,282,000 |  |  |  |  | $ 55,082,000 | $ 45,012,000 | $ 25,016,000
Kensington | December 2023 Prepayment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue liability |  |  | 25,000,000 |  | 25,000,000 |  |  |  |  |  |  |  |  |  |  |
Rochester | September 2023 Prepayment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue liability |  |  |  | 17,500,000 |  | 17,500,000 |  |  |  |  |  |  |  |  |  |
Rochester | June 2024 Prepayment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue liability |  |  | 17,500,000 |  | 17,500,000 |  |  |  |  |  |  |  |  |  |  |
Wharf | September 2023 Prepayment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue liability |  |  |  | $ 12,500,000 |  | $ 12,500,000 |  |  |  |  |  |  |  |  |  |
Wharf | June 2024 Prepayment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue liability |  |  | $ 12,500,000 |  | $ 12,500,000 |  |  |  |  |  |  |  |  |  |  |

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