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

September 30,

  

December 31,

 
  

2020

  

2019

 

Land

 $1,104  $1,431 

Buildings and improvements

  20,149   29,722 

Machinery and equipment

  126,156   132,134 

Construction in progress

  2,269   5,090 
   149,678   168,377 

Accumulated depreciation

  (114,577)  (126,434)

Property, plant and equipment, net

 $35,101  $41,943