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Note 22 - Financial Income, Net (Tables)
 12 Months Ended
Dec. 31, 2019
Notes Tables  
Interest Income and Interest Expense Disclosure [Table Text Block]
    2019   2018   2017
Interest income    
20
      
19
      
18
  
Interest expense    
(165
 )    
(111
 )    
(44
 )
Warrants exercised / forfeited    
-
      
889
      
625
  
Changes in fair value of Financial Instrument
(1)
    
-
      
-
      
2,044
  
Total    
(146
 )    
797
      
2,643