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Note 2 - Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Comprehensive Income (Loss) [Table Text Block]
   
Year
ended December 31,
  
   
2016
    
2015
    
2014
  
Foreign currency translation adjustments
, net of tax
(1)
   $
(4,321
)
   $
(5,676
)
   $
(2,017
)
Foreign currency r
ealized (loss) gain reclassified into earnings, net of tax
(
2
)
    
(3
)
    
666
      
526
  
Gain on sale of interest rate hedging agreement, net of tax
(
3
)
    
2,175
      
—
      
—
  
Other comprehensive loss
, net of tax
(
4
)
   $
(2,149
)
   $
(5,010
)
   $
(1.491
)