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ADVANCES FROM JOINT VENTURE PARTNERS - Disclosure of detailed information about joint operations (Details) - CAD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Exploration And Evaluation Assets By Geography [Line Items] |  |
Advances from joint venture partners | $ 1,565 | $ 2,404
UNITED STATES |  |
Exploration And Evaluation Assets By Geography [Line Items] |  |
Advances from joint venture partners | 1,524 | 2,305
Sweden and Norway [Member] |  |
Exploration And Evaluation Assets By Geography [Line Items] |  |
Advances from joint venture partners | $ 41 | $ 99

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