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Note 6 - Long-term Debt and Notes Payable - Long-term Debt (Details) (Parentheticals) - USD ($)
3 Months Ended 12 Months Ended
Jan. 31, 2022
Oct. 31, 2021
Virginia Real Estate Loan [Member]    
Original principal $ 6,500,000 $ 6,500,000
Monthly installments $ 31,812 $ 31,812
Debt Instrument, Interest Rate, Stated Percentage 3.95% 3.95%
Final payment $ 3,318,029 $ 3,318,029
Maturity date May 01, 2024 May 01, 2024
North Carolina Real Estate Loan [Member]    
Original principal $ 2,240,000 $ 2,240,000
Monthly installments $ 10,963 $ 10,963
Debt Instrument, Interest Rate, Stated Percentage 3.95% 3.95%
Final payment $ 711,773 $ 711,773
Maturity date May 01, 2024 May 01, 2024