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Stock-based Compensation - Classification of Stock-based Compensation (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2023	Apr. 30, 2022
Stock-based compensation:
Total stock-based compensation	$ 27,265	$ 27,041
Cost of revenue [Member]
Stock-based compensation:
Total stock-based compensation	941	349
Research and development [Member]
Stock-based compensation:
Total stock-based compensation	18,361	17,151
Selling, general and administrative [Member]
Stock-based compensation:
Total stock-based compensation	$ 7,963	$ 9,541

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- Definition

Stock based compensation.

+ References

No definition available.

+ Details

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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