Note 6 - Earnings Per Share - Basic and Diluted Earnings Per Share (Details) - shares	3 Months Ended		9 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021
Basic (in shares)	10,127,244	9,979,578	10,100,767	9,955,193
Add effects of potentially dilutive securities-assumed exercise of stock options (in shares)	111,688	170,818	132,442	175,979
Diluted (in shares)	10,238,932	10,150,396	10,233,209	10,131,172