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Note 3 - Concentrations of Credit Risk (Tables)
9 Months Ended
Jul. 31, 2023
Notes Tables  
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
   

Three Months Ended July 31,

   

Nine Months Ended July 31,

 
   

2023

   

2022

   

2023

   

2022

 

Wireless provider

    *       16 %     13 %     23 %

Distributor A

    12 %     *       *       *