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Note 3 - Inventories (Tables)
12 Months Ended
Dec. 31, 2023
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   

As of
December 31,

2023

   

As of
December 31,

2022

 

Raw materials

  $ 239,998     $ 133,183  

Work-in-process

    -       6,694  

Finished goods

    254,376       290,616  

Total

  $ 494,374     $ 430,493