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Note 24 - Reserves (Tables)
 12 Months Ended
Dec. 31, 2019
Statement Line Items [Line Items]  
Disclosure of reserves within equity [text block]
    2019     2018     2017  
                   
Foreign currency translation reserve    
(8,621
 )    
(6,561
 )    
(5,885
 )
Equity-settled share-based payment reserve (note 27.2)    
16,760
      
16,760
      
16,746
  
Contributed surplus    
132,591
      
132,591
      
132,591
  
Total    
140,730
      
142,790
      
143,452