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Note 7 - Leases (Details Textual)
 3 Months Ended 6 Months Ended 15 Months Ended
Apr. 30, 2023
USD ($)
ft²
Apr. 30, 2022
USD ($)
Apr. 30, 2023
USD ($)
ft²
Apr. 30, 2022
USD ($)
Apr. 30, 2023
USD ($)
ft²
Oct. 31, 2022
USD ($)
Operating Lease, Expense $ 109,144 $ 103,333 $ 212,477 $ 206,667    
Operating Lease, Weighted Average Remaining Lease Term (Month) 26 months 6 days   26 months 6 days   26 months 6 days  
Operating Lease, Weighted Average Discount Rate, Percent 7.10%   7.10%   7.10%  
Operating Lease, Payments $ 109,151 107,835        
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability 0 0        
Finance Lease, Interest Expense $ 1,840 2,251 $ 3,784 4,601    
Finance Lease, Right-of-Use Asset, Amortization   14,749 $ 7,374 14,749 $ 7,374  
Lessee, Finance Lease, Remaining Lease Term (Month) 40 months   40 months   40 months  
Lessee, Finance Lease, Discount Rate 4.75%   4.75%   4.75%  
Finance Lease, Principal Payments $ 8,878 $ 8,466 $ 17,652 $ 16,833    
Other Assets [Member]            
Operating Lease, Right-of-Use Asset 779,031   779,031   $ 779,031 $ 662,328
Finance Lease, Right-of-Use Asset, after Accumulated Amortization, Total 156,091   156,091   156,091 170,839
Accounts Payable and Accrued Liabilities [Member]            
Operating Lease, Liability, Current 395,891   395,891   395,891 355,183
Other Noncurrent Liabilities [Member]            
Operating Lease, Liability, Noncurrent 439,520   439,520   439,520 374,570
Finance Lease, Liability, Noncurrent 112,404   112,404   112,404 130,911
Accounts Payable and Accrued Liabilities, Current [Member]            
Finance Lease, Liability, Current $ 36,581   $ 36,581   $ 36,581 $ 35,724
Operating Lease for Office, Manufacturing and Warehouse Space in Plano, Texas [Member]            
Area of Real Estate Property (Square Foot) | ft² 34,000   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   36,000  
Lessee, Operating Lease, Term of Contract 3 years   3 years   3 years  
Operating Lease For Office Equipment [Member]            
Lessee, Operating Lease, Term of Contract 60 months   60 months   60 months