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Note 7 - Property, Plant and Equipment (Tables)
6 Months Ended
Jun. 30, 2020
Notes Tables  
Property, Plant and Equipment [Table Text Block]
  

June 30,

  

December 31,

 
  

2020

  

2019

 

Land

 $1,428  $1,431 

Buildings and improvements

  22,647   29,722 

Machinery and equipment

  124,192   132,134 

Construction in progress

  2,662   5,090 
   150,929   168,377 

Accumulated depreciation

  (113,595)  (126,434)

Property, plant and equipment, net

 $37,334  $41,943