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Supplemental Cash Flow Information (Details Narrative) - CAD ($) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Jun. 30, 2018
SUPPLEMENTAL CASH FLOW INFORMATION |  |  |
Amount transferred from reserve to deficit | $ 3,538,593 | $ 229,381 |
Accrued exploration and evaluation expenditures | $ 174,188 |  | $ 536,355

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