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v3.20.1

Supplemental Cash Flow Information (Details Narrative) - CAD ($) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
SUPPLEMENTAL CASH FLOW INFORMATION |  |  |
Amount transferred from reserve to deficit | $ 3,860,656 | $ 229,381 | $ 300,784
Accrued exploration and evaluation expenditures | 171,444 | 186,304 | 767,404
Non-cash consideration for exploration and evaluation expenditures | 51,000 |  |
Share premium liability | $ 88,987 |  |
Share issuance costs, trade payables |  | $ 250,000 |
Share issuance costs, fair value of options |  |  | 39,000
Share issuance costs, fair value of agent's warrants |  |  | $ 61,682

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
- Definition Non-cash consideration for exploration and evaluation expenditures. + References No definition available. + Details
Name: | WSCRF_NoncashConsiderationForExplorationAndEvaluationExpenditures
Namespace Prefix: | WSCRF_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash outflow for cost incurred directly with the issuance of shares resulting from trade payables. + References No definition available. + Details
Name: | WSCRF_PaymentsOfStockIssuanceCostsInTradePayables
Namespace Prefix: | WSCRF_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The cash outflow for cost incurred directly with the issuance of shares resulting from the exercise of stock options. + References No definition available. + Details
Name: | WSCRF_PaymentsOfStockIssuanceCostsOptions
Namespace Prefix: | WSCRF_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow for cost incurred directly with the issuance of shares resulting from the exercise of warrants. + References No definition available. + Details
Name: | WSCRF_PaymentsOfStockIssuanceCostsWarrants
Namespace Prefix: | WSCRF_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Share premium liability. + References No definition available. + Details
Name: | WSCRF_SharePremiumLiability
Namespace Prefix: | WSCRF_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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