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Note 14 - Trade and Other Receivables (Tables)
 6 Months Ended
Jun. 30, 2020
Statement Line Items [Line Items]  
Disclosure of the components and trade and other receivables [text block]
      December 31,  
      2020       2019  
                 
Bullion sales receivable    
4,027
      
2,987
  
VAT receivables    
1,169
      
1,765
  
Deferred consideration on the disposal of subsidiary    
1,099
      
1,991
  
Deposits for stores and equipment and other receivables    
875
      
169
  
     
7,170
      
6,912