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
Apr. 30, 2017
Jan. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]    
2018 (for the remaining nine months) $ 1,204  
2019 837  
2020 236  
2021 5  
2022 0  
2023 and thereafter 0  
Finite-life intangible assets, Net $ 2,282 $ 2,603