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Note 6 - Inventory (Tables)
9 Months Ended
Sep. 30, 2022
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

September 30,

2022

  

December 31,

2021

 

Materials

 $193,806  $50,000 

Finished goods

  133,006   101,155 

Reserve for obsolete finished goods

  (133,006

)

  — 

Total inventory, net

 $193,806  $151,155