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Note 11 - Financial Information About Geographic Areas (Tables)
9 Months Ended
Sep. 30, 2025
Notes Tables  
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]
   

For the Three Months Ended

   

For the Nine Months Ended

 
   

September 30,

   

September 30,

 
   

2025

   

2024

   

2025

   

2024

 

Net sales by geographic region

                               

United States

  $ 14,683,000     $ 14,124,000     $ 44,800,000     $ 43,551,000  

International

    102,000       127,000       479,000       472,000  
                                 

Consolidated net sales

  $ 14,785,000     $ 14,251,000     $ 45,279,000     $ 44,023,000  
   

September 30,

   

December 31,

 
   

2025

   

2024

 

Long-lived assets by geographic region

               

United States

  $ 7,006,000     $ 7,325,000  

International

    1,201,000       1,195,000  
                 

Consolidated total long-lived assets

  $ 8,207,000     $ 8,520,000