Supplemental Cash Flow Information (Details Narrative) - CAD ($)	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019
SUPPLEMENTAL CASH FLOW INFORMATION
Amount transferred from reserve to deficit	$ 2,812,376	$ 3,538,593
Accrued exploration and evaluation expenditures	6,958	$ 174,188
Additional investment	139,164
Reduction of amount receivable	$ 134,447

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.

No definition available.

Name:	WSCRF_AccruedExplorationAndEvaluationExpenditures
Namespace Prefix:	WSCRF_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant