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Exploration and Evaluation Assets - Schedule of Exploration and Evaluation Assets (Details) - CAD ($) $ in Thousands | 9 Months Ended
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Sep. 30, 2020 | Sep. 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 | 38,806 | 64,994
Greenland [Member] | Maniitsoq Property [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the end of the year | 36,276 | 62,639
Canada [Member] | Post Creek Property [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the end of the year | 1,833 | 1,782
Canada [Member] | Halcyon Property [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the end of the year | 486 | 452
Canada [Member] | Quetico Claims [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the end of the year | 184 | 80
Canada [Member] | Enid Creek [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the end of the year |  | 3
Canada [Member] | Lingman Lake [Member] |  |
Disclosure of Exploration and Evaluation Assets [Line Items] |  |
Balance at the end of the year | 27 | 26
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 | 22 | 36
Balance at the end of the year | 731 | 636
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 | 10 |
Balance at the end of the year | 308 |
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 | 8 |
Balance at the end of the year | 238 |
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 |  | 10
Balance at the end of the year |  | 298
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 |  | 8
Balance at the end of the year |  | 230
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 |  |
Acquisition costs - cash |  | 3
Balance at the end of the year |  | 3
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 |  | 14
Balance at the end of the year |  | 14
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 | 16 | 11
Corporate social responsibility |  | 3
Property maintenance | 28 | 17
Drilling | 172 | 249
Environment, health & safety |  | 8
Geology | 258 | 154
Geophysics | 106 | 37
Helicopter | 8 |
Write-off | (437) |
Increase in exploration and evaluation assets | 151 | 479
Balance at the end of the year | 38,075 | 64,356
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 | 19 |
Geophysics | 2 |
Helicopter |  |
Write-off |  |
Increase in exploration and evaluation assets | 27 |
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 | 9 |
Geophysics | 1 |
Helicopter |  |
Write-off |  |
Increase in exploration and evaluation assets | 15 |
Balance at the end of the year | 248 |
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 | 69 |
Geophysics | 28 |
Helicopter |  |
Write-off |  |
Increase in exploration and evaluation assets | 103 |
Balance at the end of the year | 142 |
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 |
Helicopter |  |
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 |  |
Helicopter |  |
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 | 16 | 9
Corporate social responsibility |  |
Property maintenance | 17 | 17
Drilling |  | 203
Environment, health & safety |  | 8
Geology | 78 | 117
Geophysics | 3 | 28
Helicopter | 8 |
Write-off |  |
Increase in exploration and evaluation assets | 122 | 382
Balance at the end of the year | $ 36,230 | 62,597
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 |  | 2
Property maintenance |  |
Drilling |  | 29
Environment, health & safety |  |
Geology |  | 20
Geophysics |  | 1
Increase in exploration and evaluation assets |  | 53
Balance at the end of the year |  | 1,484
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 |  | 1
Property maintenance |  |
Drilling |  |
Environment, health & safety |  |
Geology |  | 10
Geophysics |  | 1
Increase in exploration and evaluation assets |  | 13
Balance at the end of the year |  | 222
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 |  | 12
Environment, health & safety |  |
Geology |  |
Geophysics |  | 4
Increase in exploration and evaluation assets |  | 16
Balance at the end of the year |  | 38
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 |  |
Administration |  |
Corporate social responsibility |  |
Property maintenance |  |
Drilling |  |
Environment, health & safety |  |
Geology |  |
Geophysics |  |
Increase in exploration and evaluation assets |  |
Balance at the end of the year |  |
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 |  | 5
Environment, health & safety |  |
Geology |  | 5
Geophysics |  | 2
Increase in exploration and evaluation assets |  | 12
Balance at the end of the year |  | 12
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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