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v3.20.1

Income Taxes (Details Narrative) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 CAD ($)
Issue of flow-through shares, amount | $ 400,440
Incurred of eligible expenditures | 1,238
Proceeds from flow-through shares | $ 399,202

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- Definition Incurred of eligible expenditures . + References No definition available. + Details
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Namespace Prefix: | WSCRF_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Issue of flow-through shares, amount. + References No definition available. + Details
Name: | WSCRF_IssueOfFlowthroughSharesAmount
Namespace Prefix: | WSCRF_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Proceeds from flow-through shares. + References No definition available. + Details
Name: | WSCRF_ProceedsFromFlowthroughShares
Namespace Prefix: | WSCRF_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration