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Note 4 - Property and Equipment (Tables)
12 Months Ended
Dec. 31, 2015
Notes Tables  
Property, Plant and Equipment [Table Text Block]
 
 
December 31,
 
 
 
2015
 
 
2014
 
                 
Land and improvements
  $ 23,903     $ 23,689  
Buildings
    44,409       42,368  
Machinery and equipment
    146,704       140,578  
Equipment under capital lease
    924       6,001  
Construction in progress
    2,359       4,183  
      218,299       216,819  
Less accumulated depreciation and amortization
    (86,451 )     (84,224 )
Property and equipment, net
  $ 131,848     $ 132,595