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Note 7 - Leases (Details Textual)
 3 Months Ended 9 Months Ended
Jul. 31, 2025
USD ($)
ft²
Jul. 31, 2024
USD ($)
Jul. 31, 2025
USD ($)
ft²
Jul. 31, 2024
USD ($)
Oct. 31, 2024
USD ($)
Operating Lease, Right-of-Use Asset $ 1,795,891   $ 1,795,891   $ 1,872,206
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]         Other assets, net
Operating Lease, Liability, Current 411,273   411,273   $ 376,965
Operating Lease, Liability, Noncurrent $ 1,444,593   $ 1,444,593   $ 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 $ 153,107 $ 109,143 $ 462,766 $ 327,431  
Operating Lease, Weighted Average Remaining Lease Term 49 months 27 days   49 months 27 days    
Operating Lease, Weighted Average Discount Rate, Percent 9.50%   9.50%    
Operating Lease, Payments $ 147,390 112,670 $ 432,529 335,628  
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability 0 0 266,141 0  
Operating Lease, Right-of-Use Asset, Reduction 21,344   21,344    
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability 188,185 0 188,185 0  
Finance Lease, Right-of-Use Asset, after Accumulated Amortization $ 274,770   $ 274,770   $ 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 $ 72,903   $ 72,903   $ 39,277
Finance Lease, Liability, Noncurrent $ 176,879   $ 176,879   $ 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 $ 2,070 1,297 $ 4,098 4,224  
Finance Lease, Right-of-Use Asset, Amortization $ 10,511 7,374 $ 25,260 22,123  
Lessee, Finance Lease, Remaining Lease Term 47 months 6 days   47 months 6 days    
Lessee, Finance Lease, Discount Rate 7.10%   7.10%    
Finance Lease, Principal Payments $ 12,449 $ 9,419 $ 31,854 $ 27,927  
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