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Note 6 - Long-term Debt and Notes Payable to Bank - Long-term Debt (Details) - USD ($)
Apr. 30, 2018
Oct. 31, 2017
Long-term Loan $ 6,545,861 $ 6,670,333
Less current installments 255,775 250,726
Long-term debt, excluding current installments 6,290,086 6,419,607
Virginia Real Estate Loan [Member]    
Long-term Loan 4,868,166 4,960,738
North Carolina Real Estate Loan [Member]    
Long-term Loan $ 1,677,695 $ 1,709,595