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Note 5 - Inventory (Tables)
12 Months Ended
Dec. 31, 2023
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

2023

  

2022

 

At average cost (approximates current cost)

        

Finished goods

 $16,235  $11,719 

Work in process

  611   879 

Raw and indirect materials

  25,532   33,897 
   42,378   46,495 

LIFO reserve

  (9,400)  (19,734)

Total inventory

 $32,978  $26,761