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RECLAMATION OBLIGATIONS (Details) - CAD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
DisclosureOfReclamationObligationsLineItems [Line Items] |  |  |
Current reclamation obligations | $ 802 | $ 914 |
Noncurrent reclamation obligations | 37,618 | 31,598 |
Total reclamation obligations | 38,420 | 32,512 | $ 30,064
Elliot Lake |  |  |
DisclosureOfReclamationObligationsLineItems [Line Items] |  |  |
Total reclamation obligations | 21,523 | 17,987 |
McClean And Midwest Joint Ventures |  |  |
DisclosureOfReclamationObligationsLineItems [Line Items] |  |  |
Total reclamation obligations | 16,875 | 14,503 |
Other |  |  |
DisclosureOfReclamationObligationsLineItems [Line Items] |  |  |
Total reclamation obligations | $ 22 | $ 22 |

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