Note 10 - Income Taxes (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021	Oct. 31, 2021
Income Tax Expense (Benefit), Total	$ 140,000	$ 272,000	$ 196,000	$ 727,000
Effective Income Tax Rate Reconciliation, Percent, Total	15.40%	15.20%	16.40%	22.10%
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	$ 211,000		$ 211,000		$ 141,000
Unrecognized Tax Benefits, Ending Balance	$ 206,000		$ 206,000