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Note 7 - Leases (Details Textual)
 3 Months Ended 6 Months Ended
Apr. 30, 2022
USD ($)
ft²
Apr. 30, 2021
USD ($)
Apr. 30, 2022
USD ($)
ft²
Apr. 30, 2021
USD ($)
Oct. 31, 2021
USD ($)
Operating Lease, Expense $ 103,333 $ 100,203 $ 206,667 $ 200,568  
Operating Lease, Weighted Average Remaining Lease Term (Month) 29 months 21 days   29 months 21 days    
Operating Lease, Weighted Average Discount Rate, Percent 5.00%   5.00%    
Operating Lease, Payments $ 107,835 $ 97,674 $ 215,119 194,974  
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability     0 208,390  
Finance Lease, Interest Expense 2,251   4,601    
Finance Lease, Right-of-Use Asset, Amortization $ 7,374   $ 14,749    
Lessee, Finance Lease, Remaining Lease Term (Month) 52 months   52 months    
Lessee, Finance Lease, Discount Rate 4.75%   4.75%    
Finance Lease, Principal Payments $ 8,466   $ 16,833 $ (0)  
Other Assets [Member]          
Operating Lease, Right-of-Use Asset 847,910   847,910   $ 1,028,639
Finance Lease, Right-of-Use Asset, after Accumulated Amortization, Total 185,588   185,588   200,337
Accounts Payable and Accrued Liabilities [Member]          
Operating Lease, Liability, Current 400,423   400,423   385,463
Other Noncurrent Liabilities [Member]          
Operating Lease, Liability, Noncurrent 525,612   525,612   729,753
Finance Lease, Liability, Noncurrent 148,984   148,984   166,634
Accounts Payable and Accrued Liabilities, Current [Member]          
Finance Lease, Liability, Current $ 34,887   $ 34,887   $ 34,071
Operating Lease for Office, Manufacturing and Warehouse Space in Plano, Texas [Member]          
Area of Real Estate Property (Square Foot) | ft² 34,000   34,000    
Operating Lease for Warehouse Space in Roanoke, Virginia [Member]          
Area of Real Estate Property (Square Foot) | ft² 36,000   36,000    
Operating Lease For Office Equipment [Member]          
Lessee, Operating Lease, Term of Contract (Month) 60 months   60 months