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Note 2 - Allowance for Doubtful Accounts for Trade Accounts Receivable - Summary of Changes in the Allowance for Doubtful Accounts for Trade Accounts Receivable (Details) - USD ($)
12 Months Ended
Oct. 31, 2023
Oct. 31, 2022
Oct. 31, 2021
Balance at beginning of year $ 69,643 $ 61,527 $ 524,617
Bad debt expense 1,546 8,116 10,750
Losses charged to allowance 0 0 (473,840)
Balance at end of year $ 71,189 $ 69,643 $ 61,527