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Note 8 - Leases (Details Textual)
 12 Months Ended
Oct. 31, 2021
USD ($)
ft²
Oct. 31, 2020
USD ($)
Oct. 31, 2019
USD ($)
Operating Lease, Expense $ 407,235 $ 396,066 $ 403,097
Operating Lease, Weighted Average Remaining Lease Term (Month) 35 months 3 days    
Operating Lease, Weighted Average Discount Rate, Percent 5.00%    
Operating Lease, Payments $ 407,338 382,812  
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability 208,390 1,462,817  
Finance Lease, Interest Expense 2,439    
Finance Lease, Right-of-Use Asset, Amortization $ 6,145    
Lessee, Finance Lease, Remaining Lease Term (Month) 58 months    
Lessee, Finance Lease, Discount Rate 4.75%    
Finance Lease, Principal Payments $ 5,777 (0) $ (0)
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability 206,482    
Other Assets [Member]      
Operating Lease, Right-of-Use Asset 1,028,639    
Other Noncurrent Liabilities [Member]      
Operating Lease, Right-of-Use Asset   1,265,194  
Operating Lease, Liability, Noncurrent 729,753    
Accounts Payable and Accrued Liabilities [Member]      
Operating Lease, Liability, Current 385,463 332,329  
Other Liabilities [Member]      
Operating Lease, Liability, Noncurrent   $ 946,653  
Finance Lease, Right-of-Use Asset, after Accumulated Amortization, Total 200,337    
Finance Lease, Liability, Noncurrent 166,634    
Accounts Payable and Accrued Liabilities, Current [Member]      
Finance Lease, Liability, Current $ 34,071    
Operating Lease for Office, Manufacturing and Warehouse Space in Plano, Texas [Member]      
Area of Real Estate Property (Square Foot) | ft² 34,000    
Operating Lease for Warehouse Space in Roanoke, Virginia [Member]      
Area of Real Estate Property (Square Foot) | ft² 36,000    
Operating Lease For Office Equipment [Member]      
Lessee, Operating Lease, Term of Contract (Month) 60 months