Provision for Site Reclamation and Closure (Details Narrative) - Provision for Decommissioning, Restoration and Rehabilitation Costs $ in Thousands, $ in Thousands	Dec. 31, 2022 CAD ($)	Dec. 31, 2021 USD ($)
Statement [Line Items]
Other provisions, undiscounted cash flows	$ 6,065	$ 4,938
Major assumptions made concerning future events, other provisions, inflation rate	2.50%	2.50%
Major assumptions made concerning future events, other provisions, discount rate	3.28%	1.68%

The assumed inflation rate for the uncertainties relating to the amount or timing of outflows of economic benefits for other provisions.

No definition available.

Name:	fury_MajorAssumptionsMadeConcerningFutureEventsOtherProvisionsInflationRate
Namespace Prefix:	fury_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant