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Note 8 - Concentrations of Credit Risk - Sales (Details) - Revenue Benchmark [Member] - Customer Concentration Risk [Member]
3 Months Ended 9 Months Ended
Jul. 31, 2022
Jul. 31, 2021
Jul. 31, 2022
Jul. 31, 2021
Wireless Provider [Member]        
Concentration Risk, Percentage 16.00% 21.00% 23.00% 11.00%
Distributor A [Member]        
Concentration Risk, Percentage [1]   10.00%   12.00%
Distributor B [Member]        
Concentration Risk, Percentage   10.00%   11.00%
[1] Less than 10%