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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: