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Note 23 - Reserves (Tables)
12 Months Ended
Dec. 31, 2018
Statement Line Items [Line Items]  
Disclosure of reserves within equity [text block]
Reserves                  
    2018     2017     2016  
                   
Foreign currency translation reserve    
(6,561
)    
(5,885
)    
(6,258
)
Equity-settled share-based payment reserve (note 26.1)    
16,760
     
16,746
     
16,041
 
Contributed surplus    
132,591
     
132,591
     
132,591
 
Total    
142,790
     
143,452
     
142,374