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Note 8 - Concentrations of Credit Risk (Tables) | 6 Months Ended
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Apr. 30, 2022
Notes Tables |
Schedules of Concentration of Risk, by Risk Factor [Table Text Block] |
|  | Three Months Ended April 30, |  |  | Six Months Ended April 30, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Wireless provider |  |  | 24 | % |  |  | * |  |  |  | 28 | % |  |  | * |
Distributor A |  |  | * |  |  |  | 12 | % |  |  | * |  |  |  | 14 | %
Distributor B |  |  | * |  |  |  | 11 | % |  |  | * |  |  |  | 11 | %

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