Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets - Schedule of Finite-Life Intangible Assets, Future Amortization Expense (Detail)

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Goodwill and Intangible Assets - Schedule of Finite-Life Intangible Assets, Future Amortization Expense (Detail) - USD ($)
$ in Thousands
Oct. 31, 2018
Jan. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]    
2019 (for the remaining three months) $ 217  
2020 311  
2021 3  
2022 0  
2023 0  
2024 and thereafter 0  
Finite-life intangible assets, Net $ 531 $ 1,303