Note 1 - Business Activities and Summary of Significant Accounting Policies (Details Textual) - USD ($)	12 Months Ended
	Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2022
Goodwill, Impairment Loss	$ 0	$ 0
Goodwill	8,084,569	8,085,000
Asset Impairment Charges	0	0
Amortization of Intangible Assets, Total	1,688,000	1,701,000
Advertising Expense	361,000	76,000
Research and Development Expense	2,782,000	3,151,000	$ 3,151,000
Stock-based compensation expense	$ 924,000	$ 898,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	874,816	811,135
Trademarks [Member]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	$ 0	$ 0
Microlab/FXR LLC [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	19,800,000
Goodwill	5,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 10,300,000
Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years
Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	5 years
Weighted Average [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	7 years 7 months 13 days