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OTHER FINANCIAL ASSETS (Tables) | 12 Months Ended
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Dec. 31, 2020
Disclosure of financial assets [abstract] |
Disclosure of other financial assets [Table Text Block] |
|  | As at December 31, |
|  | 2020 |  |  | 2019 |
Current: |  |  |  |  |  |
Marketable securities |  | 1,791 |  |  | 730 |
Copper put options (Note 7) |  | 1,514 |  |  | — |
Fuel call options (Note 7) |  | 278 |  |  | — |
|  | 3,583 |  |  | 730 |
Long-term: |  |  |  |  |  |
Investment in subscription receipts |  | 1,200 |  |  | 2,400 |
Reclamation deposits |  | 2,825 |  |  | 3,083 |
Restricted cash |  | 1,273 |  |  | 1,300 |
|  | 5,298 |  |  | 6,783 |

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