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Note 9 - Inventory (Tables)
9 Months Ended
Sep. 30, 2022
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   

September 30,

   

December 31,

 
   

2022

   

2021

 
                 

Finished goods

  $ 4,792,023     $ 4,798,203  

Fabricated assemblies

    100,644       142,457  

Total inventory

  $ 4,892,667     $ 4,940,660