Intangible Assets - Estimated Amortization Expense (Detail) - USD ($) $ in Thousands |
Apr. 30, 2018 |
Jan. 31, 2018 |
[1] | ||
|---|---|---|---|---|---|
| Finite Lived Intangible Assets Future Amortization Expense Current And Five Succeeding Fiscal Years [Abstract] | |||||
| Fiscal 2019 | $ 5,122 | ||||
| Fiscal 2020 | 6,062 | ||||
| Fiscal 2021 | 3,629 | ||||
| Fiscal 2022 | 3,182 | ||||
| Fiscal 2023 | 3,182 | ||||
| Thereafter | 8,467 | ||||
| Intangible assets, Net | $ 29,644 | $ 31,490 | |||
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