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Exploration and evaluation (Tables) | 12 Months Ended
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Dec. 31, 2021
Disclosure of Exploration and evaluation assets [Abstract] |
Disclosure of detailed information about exploration assets [Table Text Block] |
|  | 2021 |  |  | 2020 |
|  | $ |  |  | $ |
Net book value - January 1 |  | 42,519 |  |  | 42,949 |
Additions |  | 3,784 |  |  | 201 |
Impairment |  | (42,668 | ) |  | - |
Transfer to royalty, stream and other interests |  | - |  |  | (631 | )
Net book value - December 31 |  | 3,635 |  |  | 42,519 |
Closing balance |  |  |  |  |  |
Cost |  | 104,492 |  |  | 100,708 |
Accumulated impairments |  | (100,857 | ) |  | (58,189 | )
Net book value |  | 3,635 |  |  | 42,519 |

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