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Inventories
3 Months Ended
Mar. 31, 2024
Inventory Disclosure [Abstract]  
Inventories

Note 6 - Inventories

 

   March 31, 2024   December 31, 2023 
Raw materials  $1,225,000   $1,156,000 
Work in process   2,501,000    2,511,000 
Finished goods   3,894,000    4,124,000 
Total inventories  $7,710,000   $7,791,000