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Note 10 - Segment Information and Business and Credit Concentrations (Details Textual) - Customer Concentration Risk [Member] - Revenue Benchmark [Member]	3 Months Ended		9 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Concentration Risk, Number of Customers	1	1	1	2
One Customer [Member]
Concentration Risk, Percentage	16.10%	15.10%	13.70%
Customer One [Member]
Concentration Risk, Percentage				14.50%
Customer Two [Member]
Concentration Risk, Percentage				14.10%

X

- Definition

Number of customers for a concentration risk benchmark.

+ 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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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-Section 50
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