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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, 2022
Oct. 31, 2021
Oct. 31, 2020
Balance at beginning of year $ 61,527 $ 524,617 $ 99,562
Bad debt expense 8,116 10,750 425,055
Losses charged to allowance 0 (473,840) 0
Balance at end of year $ 69,643 $ 61,527 $ 524,617