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Note 8 - Concentrations of Credit Risk (Details Textual) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Cash, Uninsured Amount	$ 14		$ 14
Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member] | Distributors One [Member]
Concentration Risk, Percentage	18.00%	11.00%	15.00%
Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member] | Distributors Two [Member]
Concentration Risk, Percentage	13.00%		12.00%	23.00%
Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member] | Wireless Carrier One [Member]
Concentration Risk, Percentage		35.00%		19.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Distributors One [Member]
Concentration Risk, Percentage			21.00%	11.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Distributors Two [Member]
Concentration Risk, Percentage			14.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Wireless Carrier One [Member]
Concentration Risk, Percentage				47.00%

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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- 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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