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Note 18 - Share Capital - Schedule of Share Capital Reconciliation (Details) (Parentheticals) - $ / shares | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Flow-through shares [member] |  |  |
Statement Line Items [Line Items] |  |  |
Share price (in CAD per share) | $ 0.94 | $ 1.44 |
Ordinary shares [member] |  |  |
Statement Line Items [Line Items] |  |  |
Share price (in CAD per share) |  |  | $ 0.8

X
- Definition Per share or per unit amount of equity securities issued. + References No definition available. + Details
Name: | fury_SharesIssuedSharePrice
Namespace Prefix: | fury_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | fury_Statement1LineItems
Namespace Prefix: | fury_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_ClassesOfShareCapitalAxis=fury_FlowthroughSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfShareCapitalAxis=ifrs-full_OrdinarySharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |