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Goodwill and Other Intangible Assets - Future Estimated Amortization Expense Related to Amortizable Intangible Assets (Detail) - USD ($)
$ in Thousands
Oct. 31, 2017
Jan. 31, 2017
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]    
2018 $ 364  
2019 1,458  
2020 1,458  
2021 1,310  
2022 838  
2023 and thereafter 2,723  
Net Carrying Amount $ 8,151 $ 9,012