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Note 11 - Financial Information About Geographic Areas (Tables)
3 Months Ended
Mar. 31, 2025
Notes Tables  
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]
   

For the Three Months Ended

 
   

March 31,

 
   

2025

   

2024

 

Net sales by geographic region

               

United States

  $ 13,647,000     $ 13,298,000  

International

    175,000       184,000  
                 

Consolidated net sales

  $ 13,822,000     $ 13,482,000  
   

March 31,

   

December 31,

 
   

2025

   

2024

 

Long-lived assets by geographic region

               

United States

  $ 7,235,000     $ 7,325,000  

International

    1,177,000       1,195,000  
                 

Consolidated total long-lived assets

  $ 8,412,000     $ 8,520,000