Note 6 - Earnings Per Share - Basic and Diluted Earnings Per Share (Details) - shares	3 Months Ended		6 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021
Weighted average shares outstanding for basic earnings per share (in shares)	10,107,687	9,963,291	10,087,309	9,927,776
Add effects of potentially dilutive securities-assumed exercise of stock options (in shares)	135,949	166,181	142,395	169,140
Weighted average shares outstanding for diluted earnings per share (in shares)	10,243,636	10,129,472	10,229,704	10,096,916