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Restricted Cash and Investments - Narrative (Details) - CAD ($) | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Elliot Lake reclamation trust fund |  |
Statement [Line Items] |  |
Deposit | $ 1,328,000 | $ 864,000
Fund withdrew | 1,085,000 | $ 886,000
Letters of credit facility pledged assets |  |
Statement [Line Items] |  |
Amount on deposit | $ 7,972,000 |

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