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Note 6 - Property and Equipment (Tables)
12 Months Ended
Dec. 31, 2019
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
December 31,
 
   
2019
   
2018
 
                 
Land and improvements
  $
22,480
    $
22,940
 
Buildings
   
44,251
     
40,477
 
Machinery and equipment
   
115,237
     
112,884
 
Equipment under finance lease
   
2,081
     
1,683
 
     
184,049
     
177,984
 
Less accumulated depreciation and amortization
   
(86,244
)    
(76,861
)
     
97,805
     
101,123
 
Construction in progress
   
1,826
     
2,324
 
Property and equipment, net
  $
99,631
    $
103,447