Note 2 - Concentrations of Credit Risk (Details Textual) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2024 USD ($)	Apr. 30, 2023	Apr. 30, 2024 USD ($)	Apr. 30, 2023
Cash, Uninsured Amount	$ 0.9		$ 0.9
Wireless Carrier [Member]
Number of Customers	1
Wireless Carrier [Member] | Customer Concentration Risk [Member] | Revenue from Contract with Customer Benchmark [Member]
Concentration Risk, Percentage	15.00%	20.00%	15.00%
Wireless Carrier [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member]
Concentration Risk, Percentage		24.00%
One Distributor [Member]
Number of Customers	1
One Distributor [Member] | Customer Concentration Risk [Member] | Revenue from Contract with Customer Benchmark [Member]
Concentration Risk, Percentage				18.00%
One Distributor [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member]
Concentration Risk, Percentage	10.00%		10.00%
Two Distributors [Member]
Number of Customers			0
Two Distributors [Member] | Customer Concentration Risk [Member] | Revenue from Contract with Customer Benchmark [Member]
Concentration Risk, Percentage			10.00%
Distributor Two [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member]
Concentration Risk, Percentage			10.00%
Distributor One [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member]
Concentration Risk, Percentage				24.00%