Ifrs Statement Line Items.

No definition available.

Name:	WSCRF_IfrsStatementLineItems
Namespace Prefix:	WSCRF_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of common shares owned.

+ References

No definition available.

+ Details

Name:	WSCRF_NumberOfCommonSharesOwned
Namespace Prefix:	WSCRF_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of units subscribed by the related party in a stock transaction.

+ References

No definition available.

+ Details

Name:	WSCRF_SaleOfStockNumberOfUnitsSubscribedByRelatedParty
Namespace Prefix:	WSCRF_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Warrant term.

+ References

No definition available.

+ Details

Name:	WSCRF_WarrantTerm
Namespace Prefix:	WSCRF_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Warrant to purchase additional shares.

+ References

No definition available.

+ Details

Name:	WSCRF_WarrantToPurchaseAdditionalShares
Namespace Prefix:	WSCRF_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Warrant to purchase additional shares percentage.

+ References

No definition available.

+ Details

Name:	WSCRF_WarrantToPurchaseAdditionalSharesPercentage
Namespace Prefix:	WSCRF_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of investments accounted for using the equity method. The equity method is a method of accounting whereby the investment is initially recognised at cost and adjusted thereafter for the post-acquisition change in the investor's share of net assets of the investee. The investor's profit or loss includes its share of the profit or loss of the investee. The investor's other comprehensive income includes its share of the other comprehensive income of the investee. [Refer: At cost [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2020-01-01
-Paragraph 24
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2020-en-r&anchor=para_24_a&doctype=Standard
-URIDate 2020-01-01

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2020-01-01
-Paragraph B16
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_B16&doctype=Appendix&subtype=B
-URIDate 2020-01-01

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 54
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_e&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_InvestmentAccountedForUsingEquityMethod
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The nominal value per share.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 79
-Subparagraph a
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_79_a_iii&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_ParValuePerShare
Namespace Prefix:	ifrs-full_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The percentage of voting equity interests acquired in a business combination. [Refer: Business combinations [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2020-01-01
-Paragraph B64
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2020-en-r&anchor=para_B64_c&doctype=Appendix&subtype=B
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_PercentageOfVotingEquityInterestsAcquired
Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=WSCRF_NonadjustingEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=WSCRF_PremiumNickelResourcesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent Events (Details Narrative) $ / shares in Units, $ in Thousands	Oct. 22, 2020 CAD ($) $ / shares shares	Oct. 22, 2020 USD ($)	Sep. 30, 2020 CAD ($)
Statement Line Items [Line Items]
Investment amount			$ 163,164
Ownership percentage			10.96%
Non-adjusting Events After Reporting Period [Member]
Statement Line Items [Line Items]
Investment amount	$ 15,000
Number of common shares owned \| shares	100,000
Ownership percentage	11.01%	11.01%
Non-adjusting Events After Reporting Period [Member] \| Premium Nickel Resources [Member]
Statement Line Items [Line Items]
Number of units subscribed \| shares	100,000
Share price \| $ / shares	$ 0.15
Investment amount	$ 15,000
Number of common shares owned \| shares	7,057,711
Ownership percentage	11.01%	11.01%
Warrant term	5 years
Warrant to purchase additional shares percentage	15.00%
Warrant to purchase additional shares, value		$ 10,000