XML 92 R63.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Income Taxes - Significant Components of Temporary Differences, Unused Tax Credits and Unused Tax Losses (Detail) - CAD ($) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Non-capital losses available for future periods [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Temporary Differences | $ 31,030,000 | $ 24,735,000
Expiry Date | 2031 to 2037 | 2031 to 2037
Net capital losses [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Temporary Differences | $ 355,000 | $ 355,000
Expiry Date | No expiry | No expiry
Share issuance costs [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Temporary Differences | $ 8,179,000 | $ 12,148,000
Convertible debt [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Temporary Differences |  | 24,211,000
Equipment [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Temporary Differences | $ 424,000 | $ 513,000

X
- Definition The amount of deductible temporary differences for which no deferred tax asset is recognised in the statement of financial position. [Refer: Temporary differences [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2018-01-01 -Paragraph 81 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2018-03-01&anchor=para_81_e&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_DeductibleTemporaryDifferencesForWhichNoDeferredTaxAssetIsRecognised
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- 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_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Details of temporary differences unused tax credit losses expiry date + References No definition available. + Details
Name: | nxe_DetailsOfTemporaryDifferencesUnusedTaxCreditLossesExpiryDate
Namespace Prefix: | nxe_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=nxe_NoncapitalLossesAvailableForFuturePeriodsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=nxe_NetCapitalLossesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=nxe_ShareIssuanceCostsDeferredTaxAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=nxe_TemporaryDifferencesConvertibleDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=nxe_EquipmentDeferredTaxAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |