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Note 25 - Provisions (Tables)
 12 Months Ended
Dec. 31, 2018
Statement Line Items [Line Items]  
Disclosure of other provisions [text block]
Reconciliation of site restoration provision   2018     2017  
Balance at January 1    
3,797
      
3,456
  
Reclassified to Liabilities associated with assets held for sale    
(602
 )    
—  
  
Foreign exchange movement    
(97
 )    
62
  
Unwinding of discount    
20
      
25
  
Rehabilitation performed    
(54
 )    
(22
 )
Change in estimate during the year                
- adjusted through profit or loss    
84
      
58
  
- adjustment capitalised in Property, plant and equipment    
161
      
218
  
Balance at December 31    
3,309
      
3,797