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Note 6 - Long-term Debt and Notes Payable to Bank (Details Textual) - USD ($)
6 Months Ended
Apr. 15, 2020
Jan. 22, 2020
Apr. 30, 2020
Apr. 30, 2019
Oct. 31, 2019
Proceeds from Paycheck Protection Program Under CARES Act $ 4,981,400   $ 4,981,400 $ 0  
Notes Payable, SBA PPP Loan, Periodic Payment, $ 280,335        
Notes Payable, SBA PPP Loan, Current     1,636,341   $ 0
Notes Payable, SBA PPP Loan, Noncurrent     3,345,059   $ 0
Pinnacle Financial Partners [Member] | Real Estate Term Loans [Member]          
Debt Instrument, Increase (Decrease), Net, Total   $ (200,000)      
Pinnacle Financial Partners [Member] | Revolving Credit Facility [Member]          
Line of Credit Facility, Maximum Borrowing Capacity     $ 6,500,000    
Debt Instrument, Interest Rate, Effective Percentage     3.75%    
Long-term Line of Credit, Noncurrent     $ 6,000,000.0    
Line of Credit Facility, Remaining Borrowing Capacity     $ 500,000    
Pinnacle Financial Partners [Member] | Revolving Credit Facility [Member] | Prime Rate [Member]          
Debt Instrument, Basis Spread on Variable Rate   0.50% 0.50%    
Virginia Real Estate Loan and North Carolina Real Estate Loan [Member] | Pinnacle Financial Partners [Member]          
Debt Instrument, Interest Rate, Stated Percentage     3.95%