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Note 19 - Financial Income, Net (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Interest Income and Interest Expense Disclosure [Table Text Block]
    2016     2015     2014  
Interest income    
21
      
18
      
31
  
Interest expense    
(57
 )    
(64
 )    
(65
 )
Warrants exercised / forfeited    
174
      
330
      
83
  
Changes in fair value of the warrants
(1)
    
3,811
      
(2,377
 )    
1,722
  
Total    
3,949
      
(2,094
 )    
1,771