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Note 4 - Environmental and Reclamation Activities (Tables) | 12 Months Ended
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Dec. 31, 2022
Environmental and Reclamation Activities [Abstract] |
Schedule of Reclamation and Closure Costs Liabilities |
|  | 2022 |  |  | 2021 |
Operating properties: |  |  |  |  |  |
Greens Creek |  | $ | 37,212 |  |  | $ | 37,474 |
Lucky Friday |  |  | 13,343 |  |  |  | 13,543 |
Keno Hill |  |  | 4,514 |  |  |  | — |
Casa Berardi |  |  | 11,352 |  |  |  | 12,497 |
Nevada Operations |  |  | 28,171 |  |  |  | 27,068 |
Non-operating properties: |  |  |  |  |  |
San Sebastian |  |  | 1,989 |  |  |  | 4,451 |
Troy mine |  |  | 6,980 |  |  |  | 4,813 |
Johnny M |  |  | 8,961 |  |  |  | 8,947 |
All other sites |  |  | 4,477 |  |  |  | 4,438 |
Total |  |  | 116,999 |  |  |  | 113,231 |
Reclamation and closure costs, current |  |  | (8,591 | ) |  |  | (9,259 | )
Reclamation and closure costs, long-term |  | $ | 108,408 |  |  | $ | 103,972 |
Schedule of Reclamation and Closure Costs Activities |
Balance at January 1, 2020 |  | $ | 108,374 |
Accretion expense |  |  | 5,912 |
Revision of estimated cash flows due to changes in reclamation plans |  |  | 2,543 |
Payment of reclamation obligations |  |  | (781 | )
Balance at December 31, 2020 |  |  | 116,048 |
Accruals for estimated costs |  |  | 4,952 |
Accretion expense |  |  | 6,454 |
Revision of estimated cash flows due to changes in reclamation plans |  |  | (8,781 | )
Payment of reclamation obligations |  |  | (5,442 | )
Balance at December 31, 2021 |  |  | 113,231 |
Accruals for estimated costs |  |  | 2,874 |
Accretion expense |  |  | 5,995 |
Revision of estimated cash flows due to changes in reclamation plans |  |  | 452 |
Payment of reclamation obligations |  |  | (5,553 | )
Balance at December 31, 2022 |  | $ | 116,999 |
Schedule of Change in Asset Retirement Obligation |
|  | 2022 |  |  | 2021 |
Balance January 1 |  | $ | 95,033 |  |  | $ | 100,208 |
Changes in obligations due to changes in reclamation plans |  |  | 452 |  |  |  | (8,781 | )
Accretion expense |  |  | 5,995 |  |  |  | 6,451 |
Payment of reclamation obligations |  |  | (4,860 | ) |  |  | (2,845 | )
Balance at December 31 |  | $ | 96,620 |  |  | $ | 95,033 |

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- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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