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Note 7 - Property, Plant and Equipment, Net (Tables)
9 Months Ended
Sep. 30, 2021
Notes Tables  
Property, Plant and Equipment [Table Text Block]
  

September 30,

  

December 31,

 
  

2021

  

2020

 

Land

 $1,108  $1,115 

Buildings and improvements

  20,919   19,917 

Machinery and equipment

  125,895   124,114 

Construction in progress

  2,261   1,603 
   150,183   146,749 

Accumulated depreciation

  (114,630)  (112,248)

Property, plant and equipment, net

 $35,553  $34,501