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Note 7 - Leases (Details Textual)
 3 Months Ended 6 Months Ended
Apr. 30, 2024
USD ($)
ft²
Apr. 30, 2023
USD ($)
Jan. 31, 2023
USD ($)
Apr. 30, 2024
USD ($)
ft²
Apr. 30, 2023
USD ($)
Oct. 31, 2023
USD ($)
Operating Lease, Right-of-Use Asset $ 407,796     $ 407,796   $ 596,578
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Other assets, net     Other assets, net   Other assets, net
Operating Lease, Liability, Current $ 318,225     $ 318,225   $ 414,159
Operating Lease, Liability, Noncurrent $ 121,294     $ 121,294   $ 227,925
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Accounts payable and accrued expenses     Accounts payable and accrued expenses   Accounts payable and accrued expenses
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Other noncurrent liabilities     Other noncurrent liabilities   Other noncurrent liabilities
Operating Lease, Expense $ 109,144 $ 109,144 $ 212,477 $ 218,288    
Operating Lease, Weighted Average Remaining Lease Term 16 months 15 days     16 months 15 days    
Operating Lease, Weighted Average Discount Rate, Percent 7.60%     7.60%    
Operating Lease, Payments $ 111,770 109,151        
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability 0 0        
Finance Lease, Right-of-Use Asset, after Accumulated Amortization $ 126,593     $ 126,593   $ 141,342
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Other assets, net     Other assets, net   Other assets, net
Finance Lease, Liability, Current $ 38,357     $ 38,357   $ 37,459
Finance Lease, Liability, Noncurrent $ 74,046     $ 74,046   $ 93,451
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Accounts payable and accrued expenses     Accounts payable and accrued expenses   Accounts payable and accrued expenses
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Other noncurrent liabilities     Other noncurrent liabilities   Other noncurrent liabilities
Finance Lease, Interest Expense $ 1,409 1,840   $ 2,927 $ 3,784  
Finance Lease, Right-of-Use Asset, Amortization $ 7,374 7,374   $ 14,749 14,749  
Lessee, Finance Lease, Remaining Lease Term 28 months     28 months    
Lessee, Finance Lease, Discount Rate 4.75%     4.75%    
Finance Lease, Principal Payments $ 9,309 $ 8,878   $ 18,507 $ 17,652  
Operating Lease for Office, Manufacturing and Warehouse Space in Plano, Texas [Member]            
Area of Real Estate Property | ft² 34,000     34,000    
Operating Lease for Warehouse Space in Roanoke, Virginia [Member]            
Area of Real Estate Property | ft² 36,000     36,000    
Lessee, Operating Lease, Term of Contract 3 years     3 years    
Operating Lease For Office Equipment [Member]            
Lessee, Operating Lease, Term of Contract 60 months     60 months