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Share-Based Compensation - Summary of Stock Option Activity for Both Employees and Non-employees (Detail) - $ / shares	6 Months Ended	12 Months Ended
	Jul. 31, 2021	Jan. 30, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock Options, Outstanding at beginning of period	58
Stock Options, Outstanding at end of period	58	58
Stock Options, Vested and exercisable at July 31, 2021	58
Weighted Average Exercise Price, Outstanding at beginning of period	$ 38.77
Weighted Average Exercise Price, Outstanding at end of period	38.77	$ 38.77
Weighted Average Exercise Price, Vested and exercisable at July 31, 2021	$ 38.77
Weighted Average Remaining Contractual Term (years), Outstanding	4 years 2 months 12 days	4 years 8 months 12 days
Weighted Average Remaining Contractual Term (years), Vested and exercisable at July 31, 2021	4 years 2 months 12 days

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Number of options outstanding, including both vested and non-vested options.

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-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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