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Investment in Premium Nickel Resources Inc. - Schedule of Investment (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 CAD ($)
Disclosure of detailed information about investment property [abstract]
Balance, December 31, 2020	$ 48
Reallocation of advance	50
Investment	51
Share of loss of Premium Nickel	(17)
Balance, March 31, 2021	$ 132

X

- Definition

Investment.

+ References

No definition available.

+ Details

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Namespace Prefix:	WSCRF_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Reallocation of advance.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	duration

X

- Definition

Share of loss of Premium Nickel.

+ References

No definition available.

+ Details

Name:	WSCRF_ShareOfLoss
Namespace Prefix:	WSCRF_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of investments in subsidiaries, joint ventures and associates in an entity's separate financial statements. [Refer: Associates [member]; Joint ventures [member]; Subsidiaries [member]; Investments in subsidiaries]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2020-01-01
-Paragraph 10
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2020-en-r&anchor=para_10&doctype=Standard
-URIDate 2020-01-01

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Period Type:	instant