Note 10 - Segment Information and Business and Credit Concentrations (Details Textual) - Customer Concentration Risk [Member] - Revenue Benchmark [Member]	3 Months Ended
Jan. 31, 2020	Jan. 31, 2019
Concentration Risk, Number of Customers	1	2
One Customer [Member]
Concentration Risk, Percentage	14.80%
Customer One [Member]
Concentration Risk, Percentage		13.40%
Customer Two [Member]
Concentration Risk, Percentage		16.60%

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

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