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Note 4 - Property, Plant and Equipment (Tables)
3 Months Ended
Mar. 31, 2017
Notes Tables  
Property, Plant and Equipment [Table Text Block]
 
 
March 31,
2017
 
 
December 31,
201
6
 
Land
  $
4,145
    $
4,099
 
Buildings
   
105,165
     
104,952
 
Machinery and equipment
   
166,919
     
165,157
 
 
   
276,229
     
274,208
 
Less accumulated depreciation
   
(155,320
)
   
(152,141
)
Property, plant and equipment, net
  $
120,909
    $
122,067