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Note 3 - Allowance for Credit Losses for Trade Accounts Receivable - Summary of Changes in the Allowance for Doubtful Accounts for Trade Accounts Receivable (Details) - USD ($)
6 Months Ended
Apr. 30, 2025
Apr. 30, 2024
Balance at beginning of period $ 92,125 $ 71,189
Bad debt recovery (27,232) (16,928)
Balance at end of period $ 64,893 $ 54,261