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Note 3 - Allowance for Doubtful Accounts for Trade Accounts Receivable - Summary of Changes in the Allowance for Doubtful Accounts for Trade Accounts Receivable (Details) - USD ($)
9 Months Ended
Jul. 31, 2023
Jul. 31, 2022
Balance at beginning of period $ 69,643 $ 61,527
Bad debt expense 7,767 38,063
Balance at end of period $ 77,410 $ 99,590