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Note 9 - Goodwill (Tables)
 12 Months Ended
Dec. 31, 2015
Notes Tables  
Schedule of Goodwill [Table Text Block]
    December 31,
    2015   2014
         
Balance, beginning   $ 8,339     $ 9,444  
Effect of foreign currency adjustments     (857 )     (1,105 )
Balance, ending   $ 7,482     $ 8,339