XML 75 R45.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Exploration and Evaluation Assets - Summary of Capitalized Costs on Projects (Detail) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Disclosure of exploration and expenditure assets [line items] |  |
Exploration and evaluation assets, beginning balance | $ 451,356 |
Exploration and evaluation assets, ending balance | 584,889 | $ 451,356
Acquisition cost [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Exploration and evaluation assets, beginning balance | 1,694 | 28,321
Additions | 0 | 5
Disposals due to deconsolidation of IsoEnergy |  | (26,632)
Exploration and evaluation assets, ending balance | 1,694 | 1,694
Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Exploration and evaluation assets, beginning balance | 449,662 | 376,927
Expense arising from exploration for and evaluation of mineral resources | 133,533 | 128,329
Disposals due to deconsolidation of IsoEnergy |  | (55,594)
Exploration and evaluation assets, ending balance | 583,195 | 449,662
Rook 1 Property [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Exploration and evaluation assets, beginning balance | 428,633 |
Exploration and evaluation assets, ending balance | 559,428 | 428,633
Rook 1 Property [member] | Acquisition cost [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Exploration and evaluation assets, beginning balance | 235 | 235
Additions | 0 | 0
Disposals due to deconsolidation of IsoEnergy |  | 0
Exploration and evaluation assets, ending balance | 235 | 235
Rook 1 Property [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Exploration and evaluation assets, beginning balance | 428,398 | 329,012
Expense arising from exploration for and evaluation of mineral resources | 130,795 | 105,612
Disposals due to deconsolidation of IsoEnergy |  | (6,226)
Exploration and evaluation assets, ending balance | 559,193 | 428,398
Other Athabasca Basin Properties [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Exploration and evaluation assets, beginning balance | 22,723 |
Exploration and evaluation assets, ending balance | 25,461 | 22,723
Other Athabasca Basin Properties [member] | Acquisition cost [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Exploration and evaluation assets, beginning balance | 1,459 | 1,458
Additions | 0 | 1
Disposals due to deconsolidation of IsoEnergy |  | 0
Exploration and evaluation assets, ending balance | 1,459 | 1,459
Other Athabasca Basin Properties [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Exploration and evaluation assets, beginning balance | 21,264 | 9,603
Expense arising from exploration for and evaluation of mineral resources | 2,738 | 11,661
Disposals due to deconsolidation of IsoEnergy |  | 0
Exploration and evaluation assets, ending balance | 24,002 | 21,264
General exploration and drilling [Member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 25,655 | 19,576
General exploration and drilling [Member] | Rook 1 Property [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 25,040 | 6,488
General exploration and drilling [Member] | Other Athabasca Basin Properties [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 615 | 7,574
Environmental, permitting, and engagement [Member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 16,261 | 17,583
Environmental, permitting, and engagement [Member] | Rook 1 Property [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 16,261 | 17,583
Environmental, permitting, and engagement [Member] | Other Athabasca Basin Properties [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 0 | 0
Technical, engineering and design [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 38,500 | 59,917
Technical, engineering and design [member] | Rook 1 Property [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 38,500 | 59,863
Technical, engineering and design [member] | Other Athabasca Basin Properties [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 0 | 0
Geochemistry and assays [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources |  | 143
Geochemistry and assays [member] | Rook 1 Property [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources |  | 0
Geochemistry and assays [member] | Other Athabasca Basin Properties [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources |  | 0
Geological and Geophysical [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 1,759 | 6,033
Geological and Geophysical [member] | Rook 1 Property [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 166 | 323
Geological and Geophysical [member] | Other Athabasca Basin Properties [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 1,593 | 2,978
Labour and Wages [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 29,494 | 16,953
Labour and Wages [member] | Rook 1 Property [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 28,964 | 14,796
Labour and Wages [member] | Other Athabasca Basin Properties [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 530 | 1,109
Share-based Payments [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 6,911 | 6,867
Share-based Payments [member] | Rook 1 Property [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 6,911 | 5,605
Share-based Payments [member] | Other Athabasca Basin Properties [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 0 | 0
Travel [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 1,443 | 1,257
Travel [member] | Rook 1 Property [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 1,443 | 954
Travel [member] | Other Athabasca Basin Properties [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 0 | 0
Camp And Infrastructure [Member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 13,510 |
Camp And Infrastructure [Member] | Rook 1 Property [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 13,510 |
Camp And Infrastructure [Member] | Other Athabasca Basin Properties [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 0 |
IsoEnergy Ltd. [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Exploration and evaluation assets, beginning balance | 0 |
Exploration and evaluation assets, ending balance | 0 | 0
IsoEnergy Ltd. [member] | Acquisition cost [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Exploration and evaluation assets, beginning balance | 0 | 26,628
Additions | 0 | 4
Disposals due to deconsolidation of IsoEnergy |  | (26,632)
Exploration and evaluation assets, ending balance | 0 | 0
IsoEnergy Ltd. [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Exploration and evaluation assets, beginning balance | 0 | 38,312
Expense arising from exploration for and evaluation of mineral resources | 0 | 11,056
Disposals due to deconsolidation of IsoEnergy |  | (49,368)
Exploration and evaluation assets, ending balance | 0 | 0
IsoEnergy Ltd. [member] | General exploration and drilling [Member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 0 | 5,514
IsoEnergy Ltd. [member] | Environmental, permitting, and engagement [Member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 0 | 0
IsoEnergy Ltd. [member] | Technical, engineering and design [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 0 | 54
IsoEnergy Ltd. [member] | Geochemistry and assays [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources |  | 143
IsoEnergy Ltd. [member] | Geological and Geophysical [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 0 | 2,732
IsoEnergy Ltd. [member] | Labour and Wages [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 0 | 1,048
IsoEnergy Ltd. [member] | Share-based Payments [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 0 | 1,262
IsoEnergy Ltd. [member] | Travel [member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | 0 | $ 303
IsoEnergy Ltd. [member] | Camp And Infrastructure [Member] | Deferred Exploration Costs [member] |  |
Disclosure of exploration and expenditure assets [line items] |  |
Expense arising from exploration for and evaluation of mineral resources | $ 0 |

X
- Definition The amount of assets 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 6 -IssueDate 2024-01-01 -Paragraph 24 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=6&code=ifrs-tx-2024-en-r&anchor=para_24_b&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_AssetsArisingFromExplorationForAndEvaluationOfMineralResources
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The increase (decrease) in equity resulting from the disposal of subsidiaries. [Refer: Total for all subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 106 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_106_d&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_IncreaseDecreaseThroughDisposalOfSubsidiary
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Additions to exploration and evaluation assets. + References No definition available. + Details
Name: | nxe_AdditionsToExplorationAndEvaluationAssets
Namespace Prefix: | nxe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Disclosure of explorations and expenditures assets. + References No definition available. + Details
Name: | nxe_DisclosureOfExplorationAndExpenditureAssetsLineItems
Namespace Prefix: | nxe_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Expense arising from exploration for and evaluation of mineral resources. + References No definition available. + Details
Name: | nxe_ExpenseArisingFromExplorationForAndEvaluationOfMineralResources1
Namespace Prefix: | nxe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | nxe_MineralPropertyCostsAxis=nxe_AcquisitionCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | nxe_MineralPropertyCostsAxis=nxe_DeferredExplorationCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | nxe_MineralPropertiesAxis=nxe_RookOnePropertyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | nxe_MineralPropertiesAxis=nxe_OtherAthabascaBasinPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | nxe_DeferredExplorationCostsAxis=nxe_GeneralExplorationAndDrillingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | nxe_DeferredExplorationCostsAxis=nxe_EnvironmentalPermittingAndEngagementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | nxe_DeferredExplorationCostsAxis=nxe_TechnicalEngineeringAndDesignMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | nxe_DeferredExplorationCostsAxis=nxe_GeochemistryAndAssaysMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | nxe_DeferredExplorationCostsAxis=nxe_GeologicalAndGeophysicalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | nxe_DeferredExplorationCostsAxis=nxe_LabourAndWagesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | nxe_DeferredExplorationCostsAxis=nxe_SharebasedPaymentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | nxe_DeferredExplorationCostsAxis=nxe_TravelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | nxe_DeferredExplorationCostsAxis=nxe_CampAndInfrastructureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=nxe_IsoenergyLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |