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Share-Based Compensation - Additional Information (Detail)	3 Months Ended
	Apr. 30, 2021 shares
Performance Stock Units (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock units vested	70,001
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options exercised	35,000
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock units vested	532,835

X

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

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-Name Accounting Standards Codification
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Number of share options (or share units) exercised during the current period.

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