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RESTRICTED CASH AND INVESTMENTS - Narrative (Details) - CAD ($) | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Elliot Lake reclamation trust fund |  |
Statement [Line Items] |  |
Deposit | $ 864,000 | $ 1,199,000
Fund withdrew | 886,000 | $ 974,000
Letters of credit facility pledged assets |  |
Statement [Line Items] |  |
Amount on deposit | $ 7,972,000 |

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