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Note 8 - Concentrations of Credit Risk (Details Textual) - USD ($)	9 Months Ended
	Jul. 31, 2021	Jul. 31, 2020
Cash, Uninsured Amount	$ 12.9
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Wireless Provider [Member]
Concentration Risk, Percentage	36.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Distributor A [Member]
Concentration Risk, Percentage		21.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Distributor B [Member]
Concentration Risk, Percentage		14.00%

X

- Definition

The amount of cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation.

+ References

No definition available.

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X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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