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Note 22 - Provisions (Tables)
 12 Months Ended
Dec. 31, 2017
Statement Line Items [Line Items]  
Disclosure of other provisions [text block]
Reconciliation of site restoration provision   2017     2016  
Balance at January 1    
3,456
      
2,762
  
Foreign exchange movement    
62
      
80
  
Unwinding of discount    
25
      
25
  
Rehabilitation performed    
(22
 )    
-
  
Change in estimate during the year                
- adjusted through profit or loss    
58
      
32
  
- adjustment capitalised in Property, plant and equipment    
218
      
557
  
Balance at December 31    
3,797
      
3,456