Note 8 - Concentrations of Credit Risk (Details Textual) - USD ($) $ in Millions	6 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Cash, Uninsured Amount	$ 2.9
Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member] | Wireless Carrier Customer [Member]
Concentration Risk, Percentage	28.00%
Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member] | Distributor One [Member]
Concentration Risk, Percentage		14.00%
Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member] | Distributor Two [Member]
Concentration Risk, Percentage		11.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Wireless Carrier Customer [Member]
Concentration Risk, Percentage	21.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Distributor One [Member]
Concentration Risk, Percentage		13.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Distributor Two [Member]
Concentration Risk, Percentage		14.00%