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Share Capital, Warrants and Options - Schedule of Number and Weighted Average Remaining Contractual Life of Outstanding Warrants (Details) (Parenthetical) - Warrants [Member]	12 Months Ended
	Dec. 31, 2020 $ / shares
Statement Line Items [Line Items]
Exercise price of warrant	$ 0.12
Trading days	10 days

X

- Definition

Exercise price of warrant.

+ References

No definition available.

+ Details

Name:	WSCRF_ExercisePriceOfWarrant
Namespace Prefix:	WSCRF_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Ifrs Statement Line Items.

+ References

No definition available.

+ Details

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

X

- Definition

Trading days.

+ References

No definition available.

+ Details

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

X

- Details

Name:	WSCRF_TypesOfWarrantsAxis=WSCRF_WarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: