Cash received on stock transaction after deduction of issuance costs.

No definition available.

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

- Definition

Percentage of subsidiary's or equity investee's stock owned by parent company after stock transaction.

+ References

No definition available.

+ Details

Name:	NAN_IfrsSaleOfStockPercentageOfOwnershipAfterTransaction
Namespace Prefix:	NAN_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of fees paid or payable to related party for professional services.

+ References

No definition available.

+ Details

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

- Definition

The exercise price per warrant issued in a stock transaction.

+ References

No definition available.

+ Details

Name:	NAN_SaleOfStockExercisePricePerWarrant
Namespace Prefix:	NAN_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of common share purchase warrants issued in a stock transaction.

+ References

No definition available.

+ Details

Name:	NAN_SaleOfStockNumberOfCommonSharePurchaseWarrantsGranted
Namespace Prefix:	NAN_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of units subscribed by the related party in a stock transaction.

+ References

No definition available.

+ Details

Name:	NAN_SaleOfStockNumberOfUnitsSubscribedByRelatedParty
Namespace Prefix:	NAN_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of subsidiary's or equity investee's stock owned by parent company after stock transaction.

+ References

No definition available.

+ Details

Name:	NAN_SaleOfStockSharesOwnedAfterTransaction
Namespace Prefix:	NAN_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=NAN_DirectorsAndOfficersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=NAN_SentientMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	NAN_IfrsSubsidiarySaleOfStockAxis=NAN_NonBrokeredPrivatePlacementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	NAN_IfrsSubsidiarySaleOfStockAxis=NAN_BrokeredPrivatePlacementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	NAN_SubsidiarySaleOfStocksAxis=NAN_NonBrokeredPrivatePlacementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=NAN_ContemporaryAmperexTechnologyLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Related Party Transactions (Details Narrative) $ in Thousands			9 Months Ended
	Aug. 15, 2017 CAD ($) shares	Jun. 08, 2017 CAD ($) shares	Sep. 30, 2018 CAD ($) shares	Sep. 30, 2017 CAD ($)	Sep. 30, 2018 $ / shares shares	Aug. 15, 2017 $ / shares	Jun. 08, 2017 $ / shares
Directors and Officers [Member]
Disclosure of transactions between related parties [line items]
Fees charged by a legal firm \| $			$ 203	$ 231
Sentient [Member]
Disclosure of transactions between related parties [line items]
Number of common shares beneficially owned					369,809,820
Number of common shares beneficially owned, percentage					46.93%
Sentient [Member] \| Non Brokered Private Placement [Member]
Disclosure of transactions between related parties [line items]
Number of units subscribed	38,666,666
Net proceeds from units subscribed by related party \| $	$ 2,900
Number of common share purchase warrants granted	19,333,333
Number of common share purchase warrants granted, exercise price \| $ / shares					$ 0.12	$ 0.12
Sentient [Member] \| Brokered Private Placement [Member]
Disclosure of transactions between related parties [line items]
Number of units subscribed		94,666,666
Net proceeds from units subscribed by related party \| $		$ 7,100
Number of common share purchase warrants granted		47,333,333
Number of common share purchase warrants granted, exercise price \| $ / shares							$ 0.12
Sentient [Member] \| Non Brokered Private Placement [Member]
Disclosure of transactions between related parties [line items]
Number of units subscribed			13,333,333
Net proceeds from units subscribed by related party \| $			$ 1,000
Number of common share purchase warrants granted			6,666,666
Contemporary Amperex Technology Limited [Member]
Disclosure of transactions between related parties [line items]
Number of common shares beneficially owned					200,000,000
Number of common shares beneficially owned, percentage					25.38%
Contemporary Amperex Technology Limited [Member] \| Non Brokered Private Placement [Member]
Disclosure of transactions between related parties [line items]
Number of units subscribed			200,000,000
Net proceeds from units subscribed by related party \| $			$ 15,000
Number of common share purchase warrants granted			100,000,000
Number of common share purchase warrants granted, exercise price \| $ / shares					$ 0.12