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Note 5 - Inventories (Tables)
9 Months Ended
Sep. 30, 2024
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   

September 30,

   

December 31,

 
   

2024

   

2023

 
                 

Raw materials

  $ 10,466,000     $ 10,470,000  

Work in process

    2,669,000       2,236,000  

Finished goods

    7,942,000       7,425,000  
    $ 21,077,000     $ 20,131,000