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Note 20 - Trade and Other Receivables (Tables)
 12 Months Ended
Dec. 31, 2019
Statement Line Items [Line Items]  
Disclosure of the components and trade and other receivables [text block]
    2019     2018  
             
Bullion revenue receivable    
2,987
      
2,695
  
VAT receivables    
1,765
      
2,743
  
Deferred consideration on the disposal of subsidiary    
1,991
      
-
  
Deposits for stores and equipment and other receivables    
169
      
954
  
     
6,912
      
6,392