Note 8 - Income Tax Provision (Details Textual) - USD ($)	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Income Tax Expense (Benefit), Total	$ (367,000)	$ 1,036,000
Effective Income Tax Rate Reconciliation, Percent, Total	81.90%	22.70%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%
Unrecognized Tax Benefits, Ending Balance	$ 107,000	$ 80,000	$ 59,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total	11,000	8,000
Domestic Tax Authority [Member]
Unrecognized Tax Benefits, Ending Balance	$ 96,000	$ 72,000