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Asset retirement obligation - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2026 | Jun. 30, 2026 | Dec. 31, 2025 | May 14, 2026 | May 13, 2026
Long-Lived Assets Held-for-sale [Line Items] |  |  |  |  |
Change in estimates | $ 5,700 | $ 5,736 | $ 2,675 |  |
Estimated undiscounted cash flows | 333,500 | 333,500 |  |  |
Estimated cash flows expected to be incurred | $ 6,600 | $ 6,600 |  |  |
Hycroft Mine |  |  |  |  |
Long-Lived Assets Held-for-sale [Line Items] |  |  |  |  |
Useful life |  |  |  | 51 years | 34 years
Inflation Rate |  |  |  |  |
Long-Lived Assets Held-for-sale [Line Items] |  |  |  |  |
Asset retirement obligation, measurement input | 3.42% | 3.42% |  |  |
Risk free rate |  |  |  |  |
Long-Lived Assets Held-for-sale [Line Items] |  |  |  |  |
Asset retirement obligation, measurement input | 10.78% | 10.78% |  |  |

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- Definition Asset Retirement Obligation, Estimated Cash Flows Expected To Be Incurred + References No definition available. + Details
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- Definition Asset Retirement Obligation, Estimated Undiscounted Cash Flows + References No definition available. + Details
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- Definition Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481850/410-20-50-1 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-3 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-3 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-3 + Details
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- Definition Useful life of property, plant, and equipment, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 35 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482190/360-10-35-3 + Details
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