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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