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Note 12 - Income Taxes (Details Textual) - USD ($)
 12 Months Ended
Oct. 31, 2018
Oct. 31, 2017
Oct. 31, 2016
Oct. 31, 2009
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 23.17% 34.00% 34.00%  
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability $ 1,300,000      
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax 49,281    
Deferred Tax Assets, Gross, Total 2,401,468 3,756,770    
Deferred Tax Assets, Operating Loss Carryforwards, Total 528,939 2,099,195    
Deferred Tax Assets, Operating Loss Carryforwards, Domestic 724,453      
Deferred Tax Assets, Operating Loss Carryforwards, State and Local 677,738      
Deferred Tax Assets, Valuation Allowance, Total 2,118,487 3,622,575    
Unrecognized Tax Benefits, Interest on Income Taxes Accrued 5,635 4,633    
Unrecognized Tax Benefits, Income Tax Penalties Accrued 1,927 3,194    
Income Tax Examination, Penalties and Interest Accrued, Total 40,469 36,761    
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 41,520 $ 36,336    
AOS Acquisition [Member]        
Deferred Tax Assets, Gross, Total       $ 1,517,605
Deferred Tax Assets, Operating Loss Carryforwards, Total 1,232,000     $ 4,455,525
Deferred Tax Asset Related to Tax Act [Member]        
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount $ (1,300,000)