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Note 11 - Intangible Assets (Details Textual) - USD ($)
9 Months Ended 12 Months Ended
Jul. 31, 2020
Oct. 31, 2019
Amortization of Intangible Assets, Total $ 519,000 $ 275,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (Year) 8 years 142 days