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Note 4 - Accounts Receivable - Summary of Accounts Receivables (Details) - USD ($)
Sep. 30, 2025
Dec. 31, 2024
Dec. 31, 2023
Trade accounts receivable $ 3,984,621 $ 3,033,612  
Allowance for current expected credit losses (209,166) (637,556) $ (134,912)
Total accounts receivable, net $ 3,775,455 $ 2,396,056