Note 7 - Income Tax Provision (Benefit) - Effective Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2022
U.S. federal statutory tax rate	$ (799)	$ (893)
U.S. federal statutory tax rate, percent	21.00%	21.00%
State tax provision, net of federal tax benefit	$ (170)	$ (212)
State tax provision, net of federal tax benefit, percent	4.50%	5.00%
Permanent differences	$ 14	$ 15
Permanent differences, percent	(0.40%)	(0.40%)
Stock options	$ 45	$ 88
Stock options, percent	(1.20%)	(2.10%)
R&D credits	$ 102	$ 238
R&D credits, percent	2.70%	5.60%
Uncertain tax position reserves	$ 3	$ 13
Uncertain tax position reserves, percent	(0.10%)	(0.30%)
Return-to-provision adjustments	$ 34	$ 69
Return-to-provision adjustments, percent	0.90%	1.60%
Valuation allowance	$ 3,839	$ 124
Valuation allowance, percent	(100.90%)	(2.90%)
Income Tax Expense (Benefit)	$ 2,796	$ (1,172)	$ (1,172)
Income tax expense, percent	(73.50%)	27.50%