Net Loss Per Share - Potentially Dilutive Securities Not Included in the Diluted Per Share Calculations (Details) - shares shares in Thousands	9 Months Ended
	Oct. 31, 2022	Oct. 31, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities not included in the diluted per share calculation (in shares)	45,453	21,960
Initial Notes conversion
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities not included in the diluted per share calculation (in shares)	12,500	0
Unvested RSUs issued and outstanding
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities not included in the diluted per share calculation (in shares)	14,234	12,618
Issued and outstanding stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities not included in the diluted per share calculation (in shares)	7,875	9,018
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities not included in the diluted per share calculation (in shares)	7,500	0
Unvested PSUs issued and outstanding
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities not included in the diluted per share calculation (in shares)	2,905	0
Shares committed under ESPP
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities not included in the diluted per share calculation (in shares)	439	324