Note 10 - Income Taxes (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021	Oct. 31, 2021
Income Tax Expense (Benefit), Total	$ 136,000	$ 648,000	$ 56,000	$ 454,000
Effective Income Tax Rate Reconciliation, Percent, Total	21.00%	24.20%	20.40%	21.80%
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	$ 194,000		$ 194,000		$ 141,000
Unrecognized Tax Benefits, Ending Balance	$ 189,000		$ 189,000