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Note 6 - Long-term Debt and Note Payable to Bank - Long-term Debt (Details) - USD ($)
Jan. 31, 2018
Oct. 31, 2017
Long-term Loan $ 6,609,134 $ 6,670,333
Less current installments 253,266 250,726
Long-term debt, excluding current installments 6,355,868 6,419,607
Virginia Real Estate Loan [Member]    
Long-term Loan 4,915,223 4,960,738
North Carolina Real Estate Loan [Member]    
Long-term Loan $ 1,693,911 $ 1,709,595