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Exploration and Evaluation Assets - Schedule of Exploration and Evaluation Assets (Details) - CAD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the beginning of the year |  |
Administration |  |
Balance at the end of the year | 28,711 | 64,925
Greenland [Member] | Maniitsoq Property [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the end of the year | 36,233 | 62,614
Canada [Member] | Post Creek Property [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the end of the year | 1,818 | 1,766
Canada [Member] | Halcyon Property [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the end of the year | 479 | 444
Canada [Member] | Quetico Claims [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the end of the year | 154 | 70
Canada [Member] | Enid Creek [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the end of the year |  |
Canada [Member] | Lingman Lake [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the end of the year | 27 | 19
United States [Member] | Section 35 Property [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the end of the year |  | 12
Exploration and Evaluation Assets Arising From Acquisition [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the beginning of the year | 709 | 602
Acquisition costs - cash | 13 | 25
Balance at the end of the year | 722 | 627
Exploration and Evaluation Assets Arising From Acquisition [Member] | Canada [Member] | Post Creek Property [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the beginning of the year | 298 |
Acquisition costs - cash | 5 |
Balance at the end of the year | 303 |
Exploration and Evaluation Assets Arising From Acquisition [Member] | Canada [Member] | Halcyon Property [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the beginning of the year | 230 |
Acquisition costs - cash | 4 |
Balance at the end of the year | 234 |
Exploration and Evaluation Assets Arising From Acquisition [Member] | Canada [Member] | Quetico Claims [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the beginning of the year | 42 |
Acquisition costs - cash |  |
Balance at the end of the year | 42 |
Exploration and Evaluation Assets Arising From Acquisition [Member] | Canada [Member] | Enid Creek [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the beginning of the year | 83 |
Acquisition costs - cash |  |
Balance at the end of the year | 83 |
Exploration and Evaluation Assets Arising From Acquisition [Member] | Canada [Member] | Lingman Lake [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the beginning of the year | 14 |
Acquisition costs - cash |  |
Balance at the end of the year | 14 |
Exploration and Evaluation Assets Arising From Acquisition [Member] | Greenland [Member] | Maniitsoq Property [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the beginning of the year | 42 | 42
Acquisition costs - cash | 4 |
Balance at the end of the year | 46 | 42
Exploration and Evaluation Assets Arising From Acquisition [Member] | Canada [Member] | Post Creek Property [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the beginning of the year |  | 288
Acquisition costs - cash |  | 5
Balance at the end of the year |  | 293
Exploration and Evaluation Assets Arising From Acquisition [Member] | Canada [Member] | Halcyon Property [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the beginning of the year |  | 222
Acquisition costs - cash |  | 4
Balance at the end of the year |  | 226
Exploration and Evaluation Assets Arising From Acquisition [Member] | Canada [Member] | Quetico Claims [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the beginning of the year |  | 42
Acquisition costs - cash |  |
Balance at the end of the year |  | 42
Exploration and Evaluation Assets Arising From Acquisition [Member] | Canada [Member] | Lingman Lake [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the beginning of the year |  |
Acquisition costs - cash |  | 15
Balance at the end of the year |  | 15
Exploration and Evaluation Assets Arising From Acquisition [Member] | United States [Member] | Section 35 Property [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the beginning of the year |  | 8
Acquisition costs - cash |  | 1
Balance at the end of the year |  | 9
Exploration and Evaluation Assets Arising From Exploration [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the beginning of the year | 37,924 | 63,877
Administration | 8 | 11
Corporate social responsibility |  | 1
Property maintenance | 28 | 17
Drilling | 172 | 220
Environment, health & safety |  | 8
Geology | 196 | 129
Geophysics | 98 | 35
Infrastructure |  |
Write-off | (437) |
Increase in exploration and evaluation assets | 65 | 421
Balance at the end of the year | 37,989 | 64,298
Exploration and Evaluation Assets Arising From Exploration [Member] | Canada [Member] | Post Creek Property [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the beginning of the year | 1,498 |
Administration |  |
Property maintenance | 6 |
Drilling |  |
Geology | 10 |
Geophysics | 1 |
Infrastructure |  |
Write-off |  |
Increase in exploration and evaluation assets | 17 |
Balance at the end of the year | 1,515 |
Exploration and Evaluation Assets Arising From Exploration [Member] | Canada [Member] | Halcyon Property [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the beginning of the year | 233 |
Administration |  |
Property maintenance | 5 |
Drilling |  |
Geology | 6 |
Geophysics | 1 |
Infrastructure |  |
Write-off |  |
Increase in exploration and evaluation assets | 12 |
Balance at the end of the year | 245 |
Exploration and Evaluation Assets Arising From Exploration [Member] | Canada [Member] | Quetico Claims [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the beginning of the year | 39 |
Administration |  |
Property maintenance |  |
Drilling | 6 |
Geology | 46 |
Geophysics | 21 |
Infrastructure |  |
Write-off |  |
Increase in exploration and evaluation assets | 73 |
Balance at the end of the year | 112 |
Exploration and Evaluation Assets Arising From Exploration [Member] | Canada [Member] | Enid Creek [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the beginning of the year | 33 |
Administration |  |
Property maintenance |  |
Drilling | 166 |
Geology | 83 |
Geophysics | 72 |
Infrastructure |  |
Write-off | (437) |
Increase in exploration and evaluation assets | (116) |
Balance at the end of the year | (83) |
Exploration and Evaluation Assets Arising From Exploration [Member] | Canada [Member] | Lingman Lake [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the beginning of the year | 13 |
Administration |  |
Property maintenance |  |
Drilling |  |
Geology |  |
Geophysics |  |
Infrastructure |  |
Write-off |  |
Increase in exploration and evaluation assets |  |
Balance at the end of the year | 13 |
Exploration and Evaluation Assets Arising From Exploration [Member] | Greenland [Member] | Maniitsoq Property [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the beginning of the year | 36,108 | 62,215
Administration | 8 | 9
Corporate social responsibility |  |
Property maintenance | 17 | 17
Drilling |  | 191
Environment, health & safety |  | 8
Geology | 51 | 105
Geophysics | 3 | 27
Infrastructure |  |
Write-off |  |
Increase in exploration and evaluation assets | 79 | 357
Balance at the end of the year | $ 36,187 | 62,572
Exploration and Evaluation Assets Arising From Exploration [Member] | Canada [Member] | Post Creek Property [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the beginning of the year |  | 1,431
Administration |  | 1
Corporate social responsibility |  | 1
Property maintenance |  |
Drilling |  | 24
Environment, health & safety |  |
Geology |  | 15
Geophysics |  | 1
Increase in exploration and evaluation assets |  | 42
Balance at the end of the year |  | 1,473
Exploration and Evaluation Assets Arising From Exploration [Member] | Canada [Member] | Halcyon Property [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the beginning of the year |  | 209
Administration |  | 1
Corporate social responsibility |  |
Property maintenance |  |
Drilling |  |
Environment, health & safety |  |
Geology |  | 7
Geophysics |  | 1
Increase in exploration and evaluation assets |  | 9
Balance at the end of the year |  | 218
Exploration and Evaluation Assets Arising From Exploration [Member] | Canada [Member] | Quetico Claims [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the beginning of the year |  | 22
Administration |  |
Corporate social responsibility |  |
Property maintenance |  |
Drilling |  | 2
Environment, health & safety |  |
Geology |  |
Geophysics |  | 4
Increase in exploration and evaluation assets |  | 6
Balance at the end of the year |  | 28
Exploration and Evaluation Assets Arising From Exploration [Member] | Canada [Member] | Lingman Lake [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the beginning of the year |  |
Administration |  |
Corporate social responsibility |  |
Property maintenance |  |
Drilling |  | 3
Environment, health & safety |  |
Geology |  |
Geophysics |  | 1
Increase in exploration and evaluation assets |  | 4
Balance at the end of the year |  | 4
Exploration and Evaluation Assets Arising From Exploration [Member] | United States [Member] | Section 35 Property [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the beginning of the year |  |
Administration |  |
Corporate social responsibility |  |
Property maintenance |  |
Drilling |  |
Environment, health & safety |  |
Geology |  | 2
Geophysics |  | 1
Increase in exploration and evaluation assets |  | 3
Balance at the end of the year |  | $ 3

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