Note 3 - Concentrations of Credit Risk (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Cash, Uninsured Amount	$ 14.2
Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member] | Distributors One [Member]
Concentration Risk, Percentage	14.00%
Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member] | Distributors Two [Member]
Concentration Risk, Percentage	12.00%	19.00%
Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member] | Wireless Carrier One [Member]
Concentration Risk, Percentage		23.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Distributors One [Member]
Concentration Risk, Percentage	12.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Distributors Two [Member]
Concentration Risk, Percentage	12.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Wireless Carrier One [Member]
Concentration Risk, Percentage		56.00%