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Gold and Silver Stream Agreements - Narrative (Details) - USD ($) | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2020 | Dec. 31, 2022 | Dec. 31, 2021 | Nov. 30, 2017
Discount rate (as a percent) |  | 8.00% |  |
Deferred revenue |  | $ 43,466,000 | $ 42,560,000 |
Gold Streaming Agreement |  |  |  |
Deferred revenue |  | 20,881,000 | 20,364,000 |
Gold Streaming Agreement | Aquila Resources Inc. | Gold. |  |  |  |
Amount committed | $ 50,000,000 |  |  | $ 55,000,000
Cash acquisition costs | 20,000,000 |  |  |
Deposit amount | 5,000,000 |  |  |
Project Debt Finance First Draw Down | $ 25,000,000 |  |  |
Initial Term of Agreement | 40 years |  |  |
Automatic Renewal Term of Agreement | 10 years |  |  |
Deferred revenue |  | 20,000,000 |  |
Contingent Security Deposit Liability |  | 30,000,000 |  |
Threshold Stream (as a percent) | 18.50% |  |  |
Trail Stream (as a percent) | 9.25% |  |  |
Spot price of gold (as a percent) | 30.00% |  |  |
Maximum Amount Receivable on Gold Per Ounce | $ 600 |  |  |
Threshold price of silver at which deposit received is adjusted | 105,000 |  |  |
Gold Streaming Agreement | Aquila Resources Inc. | Silver |  |  |  |
Deferred revenue |  | 17,200,000 |  |
Threshold price of silver at which deposit received is adjusted | $ 4 |  |  |
Gold Streaming Agreement | Gold Resources Acquisition Company | Aquila Resources Inc. | Gold. |  |  |  |
Ownership percentage | 100.00% |  |  |
Silver Streaming Agreement |  |  |  |
Deferred revenue |  | 22,585,000 | $ 22,196,000 |
Silver Streaming Agreement | Aquila Resources Inc. | Silver |  |  |  |
Cash acquisition costs |  | $ 17,200,000 |  |
Deposit amount | $ 0 |  |  |
Initial Term of Agreement | 40 years |  |  |
Automatic Renewal Term of Agreement | 10 years |  |  |
Commodity produced (as a percent) | 85.00% |  |  |

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