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Note 9 - Goodwill (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Goodwill [Table Text Block]
    December 31,
    2016   2015
         
Balance, beginning   $
7,482
     $
8,339
  
Effect of foreign currency adjustments    
(268
 )    
(857
 )
Balance, ending   $
7,214
     $
7,482