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Note 8 - Concentrations of Credit Risk (Details Textual) $ in Millions	3 Months Ended
	Jan. 31, 2021 USD ($)	Jan. 31, 2020
Cash, Uninsured Amount	$ 14.3
Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member]
Number of Customers	2	2
Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member] | Distributors One [Member]
Concentration Risk, Percentage	16.00%	11.00%
Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member] | Distributors Two [Member]
Concentration Risk, Percentage	12.00%	11.00%
Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member] | Wireless Carrier One [Member]
Number of Customers		1
Concentration Risk, Percentage		17.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Number of Customers	2	2
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Distributors One [Member]
Concentration Risk, Percentage	15.00%	12.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Distributors Two [Member]
Concentration Risk, Percentage	19.00%	12.00%

X

- Definition

Represents the number of customers.

+ References

No definition available.

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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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