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Note 4 - Inventory (Tables)
9 Months Ended
Sep. 30, 2024
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   

September 30, 2024

   

December 31, 2023

 

At average cost (approximates current cost)

               

Finished goods

  $ 7,914     $ 16,235  

Work in process

    748       611  

Raw materials and supplies

    22,732       25,532  
      31,394       42,378  

LIFO reserve

    (6,516 )     (9,400 )

Total inventory

  $ 24,878     $ 32,978