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Debt - Additional Information (Detail) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2021 | Jun. 30, 2019 | Jul. 31, 2021 | Jul. 31, 2020 | Jul. 31, 2021 | Jul. 31, 2020 | Jan. 31, 2021 | Jul. 31, 2018
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Term loan facility interest expense incurred |  |  | $ 0.0 | $ 0.8 |  |  |  |
Term loan facility accrued interest |  |  | $ 0.0 |  | $ 0.0 |  | $ 0.0 |
2018 Loan |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Term loan facility maximum borrowing capacity |  |  |  |  |  |  |  | $ 45.0
Term loan facility borrowings during the period |  | $ 35.0 |  |  |  |  |  |
Payment of issuance costs |  | 1.1 |  |  |  |  |  |
Proceeds from term loan facility |  | $ 33.9 |  |  |  |  |  |
Term loan facility term |  | 5 years |  |  |  |  |  |
Term loan facility interest rate description |  | LIBOR plus 6.55% |  |  |  |  |  |
Term loan facility interest rate |  | 6.55% |  |  |  |  |  |
Term loan facility interest expense incurred |  |  |  |  | $ 1.5 | $ 1.6 |  |
Repayments of term loan facility | $ 35.0 |  |  |  |  |  |  |
Payments of accrued interest and prepayment fees | $ 1.2 |  |  |  |  |  |  |

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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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