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Note 6 - Long-term Debt and Notes Payable - Long-term Debt (Details) - USD ($)
Jul. 31, 2021
Oct. 31, 2020
Long-term debt $ 4,932,252 $ 5,165,566
Less current installments 321,583 312,109
Long-term debt, excluding current installments 4,610,669 4,853,457
Virginia Real Estate Loan [Member]    
Long-term debt 3,954,778 4,119,850
North Carolina Real Estate Loan [Member]    
Long-term debt $ 977,474 $ 1,045,716