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Note 10 - Goodwill (Tables)
 9 Months Ended
Sep. 30, 2017
Notes Tables  
Schedule of Goodwill [Table Text Block]
    Nine Months
Ended September 30,
2017		   Twelve Months
Ended December 31,
2016
Balance, beginning   $
7,214
     $
7,482
  
Effect of foreign currency adjustments    
890
      
(268
 )
Balance, ending   $
8,104
     $
7,214