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Supplemental Cash Flow Information (Details Narrative) - CAD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019
SUPPLEMENTAL CASH FLOW INFORMATION |  |
Amount transferred from reserve to deficit | $ 199,971 |
Accrued exploration and evaluation expenditures | 44,566 | $ 134,555
Additional investment | $ 33,735 |

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