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Note 11 - Net Foreign Exchange Gain (Tables)
 6 Months Ended
Jun. 30, 2020
Statement Line Items [Line Items]  
Disclosure of foreign currency gains (losses) [text block]
      2020       2019  
                 
Unrealised foreign exchange gain    
5,201
      
25,447
  
Realised foreign exchange loss    
(1,492
 )    
(522
 )
Net foreign exchange gain    
3,709
      
24,925