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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, 2024
Apr. 30, 2023
Balance at beginning of period $ 71,189 $ 69,643
Bad debt expense (recovery) (16,928) 14,959
Balance at end of period $ 54,261 $ 84,602