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Note 6 - Long-term Debt and Notes Payable to Bank (Details Textual) - USD ($)
9 Months Ended
Jul. 31, 2020
Jul. 24, 2020
Apr. 15, 2020
Jul. 31, 2020
Jul. 31, 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 $ 2,469,042     2,469,042   $ 0
Notes Payable, SBA PPP Loan, Noncurrent 2,512,358     2,512,358   0
Pinnacle Financial Partners [Member] | Revolving Credit Facility [Member]            
Line of Credit Facility, Maximum Borrowing Capacity   $ 6,500,000        
Long-term Line of Credit, Noncurrent 4,600,000     4,600,000    
Line of Credit Facility, Remaining Borrowing Capacity $ 2,200,000     $ 2,200,000   850,000
Line of Credit, Current           $ 5,700,000
North Mill Capital LLC [Member] | Revolving Credit Facility [Member]            
Line of Credit Facility, Percent of Eligible Accounts   85.00%        
Line of Credit Facility, Percent of Eligible Inventory   35.00%        
Line of Credit Facility, Additional Capacity for Advances   $ 5,000,000        
Line of Credit Facility, Restricted Capacity for Advances   1,500,000        
Line of Credit Facility, Maximum Borrowing Capacity   $ 18,000,000        
Debt Instrument, Interest Rate, Effective Percentage 4.75% 4.75%   4.75%    
Debt Instrument, Term (Year) 3 years          
Debt Instrument, Term Extensions (Year)   1 year        
North Mill Capital LLC [Member] | Revolving Credit Facility [Member] | Maximum [Member]            
Debt Instrument, Interest Rate, Effective Percentage   6.00%        
North Mill Capital LLC [Member] | Revolving Credit Facility [Member] | Prime Rate [Member]            
Debt Instrument, Basis Spread on Variable Rate   1.50%   1.50%    
Virginia Real Estate Loan and North Carolina Real Estate Loan [Member] | Pinnacle Financial Partners [Member]            
Debt Instrument, Interest Rate, Stated Percentage 3.95%     3.95%