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Note 12 - Income Taxes - Unrecognized Tax Benefits (Details) - USD ($)
12 Months Ended
Oct. 31, 2020
Oct. 31, 2019
Unrecognized tax benefits balance at beginning of year $ 48,941 $ 60,147
Gross decreases for tax positions of prior years 0 (11,206)
Gross increases for current year tax positions 0 0
Unrecognized tax benefits balance at end of year $ 48,941 $ 48,941