Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands |
Apr. 30, 2019 |
Jan. 31, 2019 |
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| Goodwill And Intangible Assets Disclosure [Abstract] | ||
| Carrying value of intangible assets | $ 3,287 | $ 0 |
| X | ||||||||||
- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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