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Note 5 - Inventories, net: Summary of inventories, net (Details) - USD ($)
Dec. 31, 2024
Dec. 31, 2023
Details    
Raw materials $ 262,772 $ 425,986
Finished goods 951,786 399,291
Work in process 991,771 1,458,532
Inventories, net $ 2,206,329 $ 2,283,809