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Note 6 - Inventory (Tables)
9 Months Ended
Sep. 30, 2025
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

September 30,

  

December 31,

 
  

2025

  

2024

 
         

Finished goods

 $3,605,342  $4,098,513 

Fabricated assemblies

  53,289   53,289 

Reserve on finished goods

  (3,264,455)  (3,773,495)

Total inventory

 $394,176  $378,307