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Note 16 - Tax Expense - Movement in Recognised Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Statement Line Items [Line Items]    
Deferred tax assets (liabilities) $ (4,921) $ (7,840)
Recognised in profit or loss (5,168) (6,838)
Foreign exchange movement 4,111 9,757
Deferred tax assets (liabilities) (5,978) (4,921)
Recognised in profit or loss (5,168) (6,838)
Property, plant, and equipment deferred tax liability [member]    
Statement Line Items [Line Items]    
Deferred tax assets (liabilities) (6,323) (9,328)
Recognised in profit or loss (5,737) (8,560)
Foreign exchange movement 5,712 11,565
Deferred tax assets (liabilities) (6,348) (6,323)
Recognised in profit or loss (5,737) (8,560)
Evaluation and exploration assets [member]    
Statement Line Items [Line Items]    
Deferred tax assets (liabilities) (2) (47)
Recognised in profit or loss 0 10
Foreign exchange movement (144) 35
Deferred tax assets (liabilities) (146) (2)
Recognised in profit or loss 0 10
Allowance for obsolete stock deferred tax asset [member]    
Statement Line Items [Line Items]    
Deferred tax assets (liabilities) (163) 3
Recognised in profit or loss 90 (295)
Foreign exchange movement 138 129
Deferred tax assets (liabilities) 65 (163)
Recognised in profit or loss 90 (295)
Prepayments deferred tax liability [member]    
Statement Line Items [Line Items]    
Deferred tax assets (liabilities) (5) (10)
Recognised in profit or loss (5) 4
Foreign exchange movement 1 1
Deferred tax assets (liabilities) (9) (5)
Recognised in profit or loss (5) 4
Unrealised foreign exchange gains (losses) [member]    
Statement Line Items [Line Items]    
Deferred tax assets (liabilities) 733 499
Recognised in profit or loss 0 1,179
Foreign exchange movement (733) (945)
Deferred tax assets (liabilities) 0 733
Recognised in profit or loss 0 1,179
Trade and other payables [member]    
Statement Line Items [Line Items]    
Deferred tax assets (liabilities) 814 989
Recognised in profit or loss (111) 794
Foreign exchange movement (513) (969)
Deferred tax assets (liabilities) 190 814
Recognised in profit or loss (111) 794
Provisions [member]    
Statement Line Items [Line Items]    
Deferred tax assets (liabilities) 25 54
Recognised in profit or loss 529 30
Foreign exchange movement (350) (59)
Deferred tax assets (liabilities) 204 25
Recognised in profit or loss 529 30
Other [member]    
Statement Line Items [Line Items]    
Deferred tax assets (liabilities) 0  
Recognised in profit or loss 66  
Foreign exchange movement 0  
Deferred tax assets (liabilities) 66 $ 0
Recognised in profit or loss $ 66