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Note 12 - Income Taxes (Details Textual) - USD ($) | 12 Months Ended | 24 Months Ended |  |
--- | --- | --- | --- | ---
Oct. 31, 2021 | Oct. 31, 2019 | Oct. 31, 2021 | Oct. 31, 2020 | Oct. 31, 2009
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% | 21.00% | 21.00% |  |
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax | $ 0 |  | $ 0 | $ 25,003 |
Deferred Tax Assets, Gross, Total | 4,317,025 |  | 4,317,025 | 4,874,439 |
Deferred Tax Assets, Operating Loss Carryforwards, Total | 3,114,714 |  | 3,114,714 | 2,163,956 |
Deferred Tax Assets, Operating Loss Carryforwards, Domestic | 13,013,389 |  | 13,013,389 |  |
Deferred Tax Assets, Operating Loss Carryforwards, State and Local | 2,056,028 |  | 2,056,028 |  |
Deferred Tax Assets, Valuation Allowance, Total | 4,280,823 |  | 4,280,823 | 4,759,862 |
Unrecognized Tax Benefits, Interest on Income Taxes Accrued | 7,815 |  | 7,815 | 4,137 |
Unrecognized Tax Benefits, Income Tax Penalties Accrued | 5,113 |  | 5,113 | 0 |
Income Tax Examination, Penalties and Interest Accrued, Total | 13,607 |  | 13,607 | 26,535 |
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 21,144 |  | 21,144 | $ 35,661 |
Decrease in Unrecognized Tax Benefits is Reasonably Possible | $ 0 |  | 0 |  |
Open Tax Year | 2018 2019 2020 |  |  |  |
AOS Acquisition [Member] |  |  |  |  |
Deferred Tax Assets, Gross, Total |  |  |  |  | $ 1,517,605
Deferred Tax Assets, Operating Loss Carryforwards, Total | $ 896,000 |  | $ 896,000 |  | $ 4,455,525

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- Definition Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible alternative minimum tax credit carryforwards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32621-109319 + Details
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