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Note 3 - Inventories (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   

December 31,
2021

   

December 31,
2020

 
                 

Finished goods

  $ 193,287     $ 95,898  

Raw materials

    183,410       151,366  

Work-In-Process

    10,987       42,271  

Total

  $ 387,684     $ 289,535