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Note 10 - Goodwill
 3 Months Ended
Mar. 31, 2017
Notes to Financial Statements  
Goodwill Disclosure [Text Block]
10.
          Goodwill
 
Through
March
31,
2017,
there have not been any events or changes in circumstances that indicate that the carrying value of goodwill
may
not be recoverable. Changes in the carrying value of goodwill were as follows:
 
    Three Months Ended
March 31,		   Twelve Months Ended
December 31,
    2017   2016
         
Balance, beginning   $
7,214
     $
7,482
  
Effect of foreign currency adjustments    
114
      
(268
 )
Balance, ending   $
7,328
     $
7,214