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RECLAMATION OBLIGATIONS - Additional information (Details) - CAD ($) | Dec. 31, 2022 | Dec. 31, 2021
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Elliot Lake |  |
Reclamation Obligations |  |
Undiscounted amount of estimated future reclamation costs | $ 40,166,000 | $ 35,837,000
Discounted rate | 5.71% | 4.06%
MLJV and MWJV |  |
Reclamation Obligations |  |
Undiscounted amount of estimated future reclamation costs | $ 23,601,000 | $ 24,617,000
Discounted rate | 5.71% | 4.06%
Reclamation obligations credit facility | $ 22,972,000 |
Wheeler River and Other |  |
Reclamation Obligations |  |
Undiscounted amount of estimated future reclamation costs | $ 3,601,000 | $ 1,562,000
Discounted rate | 5.71% | 4.06%

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