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Supplemental Cash Flow Information (Details Narrative) - CAD ($) | 9 Months Ended
--- | ---
Sep. 30, 2020 | Sep. 30, 2019
SUPPLEMENTAL CASH FLOW INFORMATION |  |
Amount transferred from reserve to deficit | $ 2,812,376 | $ 3,538,593
Accrued exploration and evaluation expenditures | 6,958 | $ 174,188
Additional investment | 139,164 |
Reduction of amount receivable | $ 134,447 |

X
- Definition The amount of accrued expense arising from the search for mineral resources, including minerals, oil, natural gas and similar non-regenerative resources after the entity has obtained legal rights to explore in a specific area, as well as the determination of the technical feasibility and commercial viability of extracting the mineral resource. + References No definition available. + Details
Name: | WSCRF_AccruedExplorationAndEvaluationExpenditures
Namespace Prefix: | WSCRF_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Additional investment. + References No definition available. + Details
Name: | WSCRF_AdditionalInvestment
Namespace Prefix: | WSCRF_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount removed from reserve and transferred to retained earnings. + References No definition available. + Details
Name: | WSCRF_AmountRemovedFromReserveTransferredToRetainedEarnings
Namespace Prefix: | WSCRF_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Reduction of amount receivable. + References No definition available. + Details
Name: | WSCRF_ReductionOfAmountReceivable
Namespace Prefix: | WSCRF_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | WSCRF_SupplementalCashFlowDisclosuresAbstract
Namespace Prefix: | WSCRF_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration