Note 8 - Income Tax Provision - Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2022	Oct. 31, 2021
Income taxes at federal statutory rate	$ 333	$ 1,516
Income taxes at federal statutory rate, percentage	21.00%	21.00%
State tax provision, net of federal tax benefit	$ 60	$ 246
State tax provision, net of federal tax benefit, percentage	3.80%	3.40%
Stock options	$ 19	$ (86)
Stock options, Percent	1.20%	(1.20%)
PPP loan forgiveness	$ 0	$ (588)
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent	0.00%	(8.10%)
Permanent differences	$ 5	$ 5
Permanent differences, percentage	0.30%	0.10%
R&D credits	$ (219)	$ (51)
R&D credits, percentage	(13.60%)	(0.70%)
Foreign derived intangible income	$ (68)	$ (15)
Foreign derived intangible income, percentage	(4.30%)	(0.20%)
ASC 740-10 Liability	$ (7)	$ 29
ASC 740-10 Liability, percentage	(0.40%)	0.40%
Section 481(a) adjustment	$ 142	$ 0
Section 481(a) adjustment, percentage	8.90%	0.00%
Return-to-provision adjustments	$ (126)	$ 0
Return-to-provision adjustments, percentage	(7.90%)	0.00%
Other	$ 0	$ (20)
Other, percentage	(0.00%)	(0.30%)
Income Tax Expense (Benefit), Total	$ 139	$ 1,036
Effective Income Tax Rate Reconciliation, Percent, Total	9.20%	14.40%