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ACCOUNTS PAYABLE AND ACCRUED LIABILITIES - Additional information (Details) - CAD ($) | Dec. 31, 2023 | Dec. 31, 2022
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ACCOUNTS PAYABLE AND ACCRUED LIABILITIES |  |
Provision for reclamation costs undiscounted cash flows | $ 1,285,031 | $ 1,411,293

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- References No definition available. + Details
Name: | nfgc_AccountsPayablesAndAccruedLiabilitiesAbstract
Namespace Prefix: | nfgc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of contractual undiscounted cash flows in relation to provision for reclamation costs current. + References No definition available. + Details
Name: | nfgc_ProvisionForReclamationCostsCurrentUndiscountedCashFlows
Namespace Prefix: | nfgc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant