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Note 5 - Inventories (Tables)
3 Months Ended
Mar. 31, 2024
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   

March 31,

   

December 31,

 
   

2024

   

2023

 
                 

Raw materials

  $ 10,012,000     $ 10,470,000  

Work in process

    2,425,000       2,236,000  

Finished goods

    8,332,000       7,425,000  
    $ 20,769,000     $ 20,131,000