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Note 7 - Property, Plant and Equipment, Net
 3 Months Ended
Mar. 31, 2020
Notes to Financial Statements  
Property, Plant and Equipment Disclosure [Text Block]
7.
 
PROPERTY, PLANT AND EQUIPMENT
 
Property, plant and equipment consist of the following:
 
   
March 31,
    
December 31,
  
   
2020
    
2019
  
Land
   $
1,423
     $
1,431
  
Buildings and improvements
    
30,550
      
29,722
  
Machinery and equipment
    
132,447
      
132,134
  
Construction in progress
    
2,645
      
5,090
  
     
167,065
      
168,377
  
Accumulated depreciation
    
(126,204
 )    
(126,434
 )
Property, plant and equipment, net
   $
40,861
     $
41,943
  
 
 
Depreciation expense for the
three
months ended
March 31, 2020
and
2019
was
$2.3
 million and
$2.5
million, respectively. Depreciation expense related to our manufacturing facilities and equipment is included in cost of sales and depreciation expense associated with administrative facilities and office equipment is included in selling, general and administrative expense within the accompanying condensed consolidated statements of operations.