XML 115 R43.htm IDEA: XBRL DOCUMENT
v3.22.1

EXPLORATION AND EVALUATION ASSETS - Ontario Projects (Details) | 12 Months Ended
--- | ---
Dec. 31, 2021 CAD ($) ha | Dec. 31, 2020 CAD ($)
Exploration and Evaluation Assets [Line Items] |  |
Impairment of exploration and evaluation assets | $ 28,604 | $ 166,662
Ontario |  |
Exploration and Evaluation Assets [Line Items] |  |
Impairment of exploration and evaluation assets | $ 28,604 | 153,912
Lucky Strike project in Kirkland Lake, Ontario |  |
Exploration and Evaluation Assets [Line Items] |  |
Percentage of interest in mineral licenses | 100.00% |
Area of hectares of land | ha | 11,684 |
Impairment of exploration and evaluation assets | $ 28,604 | $ 153,912
Lucky Strike project in Kirkland Lake, Ontario | Minimum |  |
Exploration and Evaluation Assets [Line Items] |  |
Net smelter return ("NSR") royalties (as a percent) | 1.00% |
Lucky Strike project in Kirkland Lake, Ontario | Maximum |  |
Exploration and Evaluation Assets [Line Items] |  |
Net smelter return ("NSR") royalties (as a percent) | 2.00% |

X
- Definition Represents the area of hectares of land. + References No definition available. + Details
Name: | nfgc_AreaOfHectaresOfLand
Namespace Prefix: | nfgc_
Data Type: | dtr-types:areaItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
Name: | nfgc_ExplorationAndEvaluationAssetsLineItems
Namespace Prefix: | nfgc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Impairment of exploration and evaluation of mineral resources. + References No definition available. + Details
Name: | nfgc_ImpairmentOfExplorationAndEvaluationOfMineralResources
Namespace Prefix: | nfgc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the percentage of interest in mineral licenses. + References No definition available. + Details
Name: | nfgc_PercentageOfInterestInMineralLicenses
Namespace Prefix: | nfgc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of net smelter return ("NSR") royalties. + References No definition available. + Details
Name: | nfgc_PercentageOfNetSmelterReturnRoyalties
Namespace Prefix: | nfgc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=stpr_CA-ON
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=nfgc_LuckyStrikeProjectInKirklandLakeOntarioMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |