Note 8 - Income Tax Provision - Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Income taxes at federal statutory rate	$ (94)	$ 957
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%
State tax provision, net of federal tax benefit	$ (41)	$ 160
State tax provision, net of federal tax benefit, percentage	9.20%	3.50%
Stock options	$ (123)	$ 21
Stock options, percentage	27.50%	0.50%
Meals and entertainment	$ 2	$ 8
Meals and entertainment, percentage	(0.40%)	0.20%
Parking disallowance	$ 5
Parking disallowance, percentage	(1.10%)	0.00%
R&D credits	$ (152)	$ (119)
R&D credits, percentage	33.90%	(2.60%)
Foreign derived intangible income	$ (5)
Foreign derived intangible income, percentage	1.10%	0.00%
ASC 740-10 Liability	$ 27	$ 21
ASC 740-10 Liability, percentage	(6.00%)	0.50%
Penalties	$ 11
Penalties, percentage	(2.50%)	0.00%
Other	$ 3	$ (12)
Other, percentage	(0.70%)	(0.30%)
Income Tax Expense (Benefit), Total	$ (367)	$ 1,036
Percentage	81.90%	22.70%