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Note 18 - Property, Plant and Equipment (Details Textual)
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jul. 01, 2021
oz
Jun. 30, 2021
oz
Aug. 31, 2015
oz
Mar. 31, 2023
Dec. 31, 2023
USD ($)
oz
Dec. 31, 2023
USD ($)
oz
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Oct. 26, 2023
USD ($)
Oct. 06, 2023
USD ($)
Sep. 29, 2023
USD ($)
Jun. 27, 2023
USD ($)
Statement Line Items [Line Items]                        
Additions other than through business combinations, property, plant and equipment           $ 29,606,000 $ 48,220,000          
Impairment loss recognised in profit or loss, property, plant and equipment           877,000 8,209,000 $ 498,000        
Total property, plant and equipment         $ 179,649,000 179,649,000 178,983,000          
Notional amount         12,000 12,000            
Impairment loss for oxide assets, carrying value                       $ 851,000
Gold price, price per ounce                 $ 1,900      
Production per annum (Ounce) | oz 57,000 57,000                    
Peak capex         $ 30,800,000 $ 30,800,000            
Weighted average cost of capital, percentage         15.40% 15.40%            
Applicable tax rate           25.75%            
Estimated production in mine remaining (Ounce) | oz         160,000 160,000            
Useful life measured as period of time, property, plant and equipment (Year)       10 years 5 years              
Total capital commitments         $ 2,035,000 $ 2,035,000 4,066,000          
Bottom of range [member]                        
Statement Line Items [Line Items]                        
Gold price, price per ounce         $ 1,748 $ 1,748            
Grade range         3.14 3.14            
Production per annum (Ounce) | oz     75,000     77,822            
On mine cost         $ 892 $ 892            
Top of range [member]                        
Statement Line Items [Line Items]                        
Gold price, price per ounce         $ 2,034 $ 2,034       $ 1,900 $ 1,900  
Grade range         3.29 3.29            
Production per annum (Ounce) | oz     80,000     81,446            
On mine cost         $ 1,427 $ 1,427            
Construction in progress [member]                        
Statement Line Items [Line Items]                        
Additions other than through business combinations, property, plant and equipment           $ 1,962,000 468,000          
Development assets [member]                        
Statement Line Items [Line Items]                        
Impairment loss recognised in profit or loss, property, plant and equipment             8,518,000          
Power generating assets [member]                        
Statement Line Items [Line Items]                        
Impairment loss recognised in profit or loss, property, plant and equipment             791,000          
Loader bottom decks [member]                        
Statement Line Items [Line Items]                        
Impairment loss recognised in profit or loss, property, plant and equipment             101,000          
Impaired assets [member]                        
Statement Line Items [Line Items]                        
Total property, plant and equipment             $ 0