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Basis of Preparation and Significant Accounting Policies - Schedule of Depreciation and Amortization Rate (Details) | 12 Months Ended
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Dec. 31, 2020
Exploration Equipment [Member] |
Statement Line Items [Line Items] |
Depreciation and amortization rate | 20.00%
Computer Software [Member] |
Statement Line Items [Line Items] |
Depreciation and amortization rate | 50.00%
Computer Equipment [Member] |
Statement Line Items [Line Items] |
Depreciation and amortization rate | 55.00%

X
- Definition Represents the depreciation and amortization rate. + References No definition available. + Details
Name: | WSCRF_DepreciationAndAmortizationRate
Namespace Prefix: | WSCRF_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Ifrs Statement Line Items. + References No definition available. + Details
Name: | WSCRF_IfrsStatementLineItems
Namespace Prefix: | WSCRF_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_TangibleExplorationAndEvaluationAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_ComputerSoftwareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=WSCRF_ComputerEquipmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |