Note 7 - Concentrations of Credit Risk - Sales (Details) - Revenue Benchmark [Member] - Customer Concentration Risk [Member]	3 Months Ended
Jan. 31, 2022	Jan. 31, 2021
Wireless Provider [Member]
Concentration Risk, Percentage	32.00%
Distributor A [Member]
Concentration Risk, Percentage		16.00%
Distributor B [Member]
Concentration Risk, Percentage		12.00%

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://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

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