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Note 29 - Provisions - Reconciliation of Site Restoration Provision (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Provision for decommissioning, restoration and rehabilitation costs for Blanket mine [member]    
Statement Line Items [Line Items]    
Balance $ 2,823 $ 3,159
Unwinding of discount (note 17) 109 132
Change in estimate 1,834 (468)
Balance 4,766 2,823
Balance 4,766 2,823
Provision for decommissioning, restoration and rehabilitation costs for Motapa [member]    
Statement Line Items [Line Items]    
Change in estimate 1,466 0
Provision for decommissioning, restoration and rehabilitation costs for Maligreen [member]    
Statement Line Items [Line Items]    
Change in estimate 152 0
Provision for decommissioning, restoration and rehabilitation costs for Motapa and Maligreen [member]    
Statement Line Items [Line Items]    
Change in estimate 1,618  
Provision for decommissioning, restoration and rehabilitation costs for Motapa, Maligreen, and Bilboes [member]    
Statement Line Items [Line Items]    
Balance 135 135
Balance 6,219 135
Balance 6,219 135
Provision for decommissioning, restoration and rehabilitation costs for Bilboes Holdings [member]    
Statement Line Items [Line Items]    
Acquisition - (Bilboes) (note 5) 4,466 0
Provision for decommissioning, restoration and rehabilitation costs [member]    
Statement Line Items [Line Items]    
Balance 2,958  
Balance 10,985 2,958
Balance 10,985 2,958
Current 0 0
Non-current $ 10,985 $ 2,958