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Note 18 - Research and Development Expenses (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Research and Development Expenses [Table Text Block]
    2016     2015     2014  
Gross research and development expenses    
(4,577
 )    
(3,308
 )    
(3,728
 )
Research Tax Credit    
511
      
448
      
518
  
Grants    
198
      
170
      
278
  
Net Research and development expenses    
(3,868
 )    
(2,690
 )    
(2,932
 )