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 ($)	3 Months Ended
	Jan. 31, 2023	Jan. 31, 2022
Balance at beginning of period	$ 69,643	$ 61,527
Bad debt recovery	(9,787)	(4,328)
Balance at end of period	$ 59,856	$ 57,199