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Estimated amortization expense related to finite lived intangible assets (Detail) - USD ($)
$ in Thousands
Oct. 31, 2017
Oct. 31, 2016
Estimated Amortization Expense Related To Finite Lived Intangible Assets [Line Items]    
2018 $ 553  
2019 553  
2020 553  
2021 413  
2022 413  
Thereafter 545  
Total $ 3,030 $ 3,619