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Note 18 - Exploration and Evaluation Assets (Details Textual)
$ in Thousands
 12 Months Ended 13 Months Ended 25 Months Ended
Nov. 03, 2021
USD ($)
ha
oz
t
Dec. 16, 2020
USD ($)
Nov. 19, 2020
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2022
USD ($)
Nov. 09, 2022
USD ($)
Nov. 07, 2022
oz
t
Nov. 01, 2022
USD ($)
oz
Statement Line Items [Line Items]                      
Cash flows from (used in) exploration for and evaluation of mineral resources, classified as investing activities       $ (2,596) $ (5,717) $ (2,759)          
Total trade and other current payables       17,454 9,957   $ 9,957 $ 17,454      
Adjustments for impairment loss (reversal of impairment loss) recognised in profit or loss, exploration and evaluation assets       467 3,837 $ 2,930          
Motapa [member]                      
Statement Line Items [Line Items]                      
Cash transferred                 $ 41,000   $ 1,000
Financial liabilities recognised as of acquisition date                     $ 0
Motapa [member]                      
Statement Line Items [Line Items]                      
Historic gold mined, mass (Ounce) | oz                     300,000
Maligreen [member]                      
Statement Line Items [Line Items]                      
Historic gold mined, mass (Ounce) | oz 20,000                    
Cash flows from (used in) exploration for and evaluation of mineral resources, classified as investing activities $ (4,000)                    
Inferred Mineral Resource (Ounce) 940,000                 6,170,000  
Exploration and evaluation work, period (Year) 30 years                    
Estimated meters of diamond core and percussion drilling 60,000                    
Estimated bulk metallurgical test work (Metric Ton) | t 3.5                    
Area of land (Hectare) | ha 550                    
Indicated mineral resources (Metric Ton) | t                   8,030,000.00  
Grade of indicated mineral resources                   1.71  
Estimated gold in mineral resources (Ounce) | oz                   442,000  
Grade of inferred mineral resources                   2.12  
Estimated gold in inferred mineral resource (Ounce) | oz                   420,000  
Maligreen [member] | Bottom of range [member]                      
Statement Line Items [Line Items]                      
Period of initial exploration and evaluation work (Month) 18 months                    
Connemara North [Member]                      
Statement Line Items [Line Items]                      
Total trade and other current payables   $ 300                  
Period of option agreement (Month)   18 months                  
Payments for exploration and evaluation expenses               500      
Adjustments for impairment loss (reversal of impairment loss) recognised in profit or loss, exploration and evaluation assets       500              
Expected exploration and evaluation of mineral resources expenses       $ 0       $ 0      
Glen Hume [Member]                      
Statement Line Items [Line Items]                      
Period of option agreement (Month)     15 months                
Adjustments for impairment loss (reversal of impairment loss) recognised in profit or loss, exploration and evaluation assets         3,800   3,800        
Expected exploration and evaluation of mineral resources expenses         $ 0   $ 0