Note 7 - Loss Per Share - Basic and Diluted Earnings Per Share (Details) - shares	3 Months Ended		6 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2023	Apr. 30, 2022
Basic (in shares)	10,290,911	10,107,687	10,256,158	10,087,309
Add effects of potentially dilutive securities-assumed exercise of stock options (in shares)	36,360	135,949	0	142,395
Diluted (in shares)	10,327,271	10,243,636	10,256,158	10,229,704