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Business activities and summary of significant accounting policies - Estimated amortization expense related to finite lived intangible assets (Detail) - USD ($)
$ in Thousands
Oct. 31, 2019
Oct. 31, 2018
Business activities and summary of significant accounting policies    
2020 $ 275  
2021 136  
2022 89  
2023 79  
2024 79  
Thereafter 434  
Total $ 1,092 $ 1,367