Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 718
-SubTopic 10
-Section 50
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Stock-Based Compensation - Additional Information (Details) - USD ($)	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Income tax benefit related to stock-based compensation expense	$ 0	$ 0	$ 0
Unrecognized share-based compensation expense related to unvested share-based awards	$ 19,000,000.0
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expenses recognized on straight line basis offering period	2 years 6 months
Restricted Stock Units (RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expenses recognized on straight line basis offering period	2 years 6 months
ESPP
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expenses recognized on straight line basis offering period	2 years 6 months