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Note 4 - Inventories (Tables)
6 Months Ended
Jun. 30, 2024
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   

As of

June 30,

2024

   

As of

December 31,

2023

 

Raw materials

  $ 313,847     $ 239,998  

Work-in-process

    -       -  

Finished goods

    254,368       254,376  

Total

  $ 568,215     $ 494,374