Goodwill and Intangible Assets - Schedule of Change in Carrying Amount of Goodwill (Detail) - USD ($) |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Jul. 31, 2018 |
Jan. 31, 2019 |
Jan. 31, 2018 |
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| Goodwill And Intangible Assets Disclosure [Abstract] | |||
| Goodwill, beginning balance | $ 25,579,000 | $ 23,287,000 | |
| Cumulative translation adjustment | (1,324,000) | 2,292,000 | |
| Loss on impairment | $ 0 | (15,502,000) | |
| Goodwill, ending balance | $ 8,753,000 | $ 25,579,000 | |
| X | ||||||||||
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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