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Note 8 - Other Expenses (Tables)
 6 Months Ended
Jun. 30, 2020
Statement Line Items [Line Items]  
Disclosure of other operating expenses components [text block]
      2020       2019  
                 
Intermediated Money Transaction Tax    
213
      
165
  
Solar expenses    
202
      
-
  
COVID-19 Donations    
1,048
      
-
  
Impairment of property, plant and equipment    
59
      
144
  
     
1,522
      
309