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Note 11 - Intangible Assets (Details Textual) - USD ($)
6 Months Ended 12 Months Ended
Apr. 30, 2022
Oct. 31, 2021
Amortization of Intangible Assets $ 423,000 $ 442,000
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year) 9 years 4 months 20 days