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Note 2 - Business Acquisition - Unaudited Pro Forma Financial Information (Details) - Microlab/FXR LLC [Member] - USD ($) | 12 Months Ended
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Oct. 31, 2022 | Oct. 31, 2021
Revenue | $ 91,358 | $ 73,727
Net income | $ 1,959 | $ 7,537
Basic (in dollars per share) | $ 0.19 | $ 0.75
Diluted (in dollars per share) | $ 0.19 | $ 0.74
Basic (in shares) | 10,120,254 | 9,978,683
Diluted (in shares) | 10,242,417 | 10,154,239

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- Definition The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(3) -URI https://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2) -URI https://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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