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Note 5 - Inventory (Tables)
9 Months Ended
Sep. 30, 2025
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   

September 30,

   

December 31,

 
   

2025

   

2024

 
                 

Raw materials

  $ 9,652,000     $ 10,948,000  

Work in process

    3,507,000       2,934,000  

Finished goods

    10,320,000       8,851,000  
    $ 23,479,000     $ 22,733,000