Supplemental Cash Flow Information (Details Narrative) - CAD ($)	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019
SUPPLEMENTAL CASH FLOW INFORMATION
Amount transferred from reserve to deficit	$ 2,771,485	$ 1,561,344
Accrued exploration and evaluation expenditures	49,094	$ 172,059
Additional investment	$ 106,343

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