Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jan. 31, 2019 |
Jan. 31, 2018 |
Apr. 30, 2019 |
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| Contingencies And Commitments [Line Items] | |||
| Operating leases, rent expense | $ 1.2 | $ 1.6 | |
| Operating lease expiration year | 2024 | ||
| Netherlands [Member] | Scenario Forecast [Member] | |||
| Contingencies And Commitments [Line Items] | |||
| Reduction in lease commitments in fiscal 2020 | $ 0.2 | ||
| Reduction in lease commitments in fiscal 2021 | $ 0.2 | ||
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- Definition Contingencies and Commitments [Line Items] No definition available.
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- Definition Operating lease expiration year. No definition available.
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- Definition Operating leases reduction in future minimum payments due current. No definition available.
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- Definition Operating leases reduction in future minimum payments due in two years. No definition available.
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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