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Note 3 - Income Taxes (Tables)
 9 Months Ended
Sep. 30, 2016
Notes Tables  
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
   
Three Months Ended
    
Nine Months Ended
  
   
September 30,
    
September 30,
  
   
2016
    
2015
    
2016
    
2015
  
Current:
                                
Domestic
   $ 4,123     $ (4,776
)
   $ 4,122     $ (2,911
)
Foreign
     5,773       451       8,416       606  
Total current income tax provision (benefit)
     9,896       (4,325
)
     12,538       (2,305
)
                                 
Deferred:
                                
Domestic
     (5,723
)
     1,812       3,642       5,400  
Foreign
     5,280       (2,987
)
     6,423       (7,288
)
Total deferred income tax provision (benefit)
     (443
)
     (1,175
)
     10,065       (1,888
)
Total income tax provision (benefit)
   $ 9,453     $ (5,500
)
   $ 22,603     $ (4,193
)