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Supplemental Cash Flow Information (Details Narrative) $ in Thousands	9 Months Ended
	Sep. 30, 2018 CAD ($)
SUPPLEMENTAL CASH FLOW INFORMATION
Amount transferred from reserve to deficit	$ 229
Accrued exploration and evaluation expenditures	$ 536

X

- Definition

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.

+ References

No definition available.

+ Details

Name:	NAN_AccruedExplorationAndEvaluationExpenditures
Namespace Prefix:	NAN_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- Definition

Amount removed from reserve and transferred to retained earnings.

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No definition available.

+ Details

Name:	NAN_AmountRemovedFromReserveTransferredToRetainedEarnings
Namespace Prefix:	NAN_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- References

No definition available.

+ Details

Name:	NAN_SupplementalCashFlowDisclosuresAbstract
Namespace Prefix:	NAN_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration