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Note 7 - Leases (Details Textual)
 3 Months Ended 6 Months Ended
Apr. 30, 2025
USD ($)
ft²
Apr. 30, 2024
USD ($)
Apr. 30, 2025
USD ($)
ft²
Apr. 30, 2024
USD ($)
Oct. 31, 2024
USD ($)
Operating Lease, Right-of-Use Asset $ 1,903,095   $ 1,903,095   $ 1,872,206
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 $ 429,255   $ 429,255   $ 376,965
Operating Lease, Liability, Noncurrent $ 1,528,598   $ 1,528,598   $ 1,525,423
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 $ 154,266 $ 109,144 $ 309,659 $ 218,288  
Operating Lease, Weighted Average Remaining Lease Term 52 months 9 days   52 months 9 days    
Operating Lease, Weighted Average Discount Rate, Percent 9.40%   9.40%    
Operating Lease, Payments $ 147,622 111,770      
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability 0 0      
Finance Lease, Right-of-Use Asset, after Accumulated Amortization $ 97,096   $ 97,096   $ 111,844
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 $ 40,219   $ 40,219   $ 39,277
Finance Lease, Liability, Noncurrent $ 33,827   $ 33,827   $ 54,174
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 $ 956 1,409 $ 2,028 2,927  
Finance Lease, Right-of-Use Asset, Amortization $ 7,374 7,374 $ 14,748 14,748  
Lessee, Finance Lease, Remaining Lease Term (Month) 16 months   16 months    
Lessee, Finance Lease, Discount Rate 4.75%   4.75%    
Finance Lease, Principal Payments $ 9,761 $ 9,309 $ 19,405 $ 18,507  
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    
Operating Lease For Office Equipment [Member]          
Lessee, Operating Lease, Term of Contract 60 months   60 months