Note 7 - Stock-based Compensation and Equity Transactions - Options Outstanding (Details) - $ / shares	9 Months Ended
	Jul. 31, 2024	Nov. 01, 2023
Outstanding, shares (in shares)	754,186
Outstanding, weighted average exercise price (in dollars per share)	$ 5.18	$ 6.04
Options granted, shares (in shares)	245,001
Options granted, weighted average exercise price (in dollars per share)	$ 3.01
Exercise of stock options (in shares)	0
Options cancelled, shares (in shares)	39,097
Options cancelled (in dollars per share)	$ 8.03
Options outstanding, shares (in shares)	960,090
Options exercisable, shares (in shares)	555,664
Options exercisable, weighted average exercise price (in dollars per share)	$ 5.69
Options vested and expected to vest, shares (in shares)	954,623
Options vested and expected to vest, weighted average exercise price (in dollars per share)	$ 5.08