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Note 12 - Accumulated Other Comprehensive Loss (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
   
2016
    
2015
  
Foreign currency translation adjustments
   $
11,815
     $
7,491
  
Gain on sale of interest rate
hedge agreement
(1)
    
(2,175
)
    
—
  
Total
   $
9,640
     $
7,491