Net Loss Per Share - Potentially Dilutive Securities (Details) - shares	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Potentially dilutive securities
Antidilutive securities excluded from computation of earnings per share, amount	38,883	13,855	14,654
Shares subject to outstanding common stock options
Potentially dilutive securities
Antidilutive securities excluded from computation of earnings per share, amount	108	213	419
Shares subject to outstanding RSUs, PSUs and RSAs
Potentially dilutive securities
Antidilutive securities excluded from computation of earnings per share, amount	12,301	11,933	11,723
Employee stock purchase plan
Potentially dilutive securities
Antidilutive securities excluded from computation of earnings per share, amount	4,216	1,709	641
Shares underlying the conversion spread in the convertible senior notes
Potentially dilutive securities
Antidilutive securities excluded from computation of earnings per share, amount	22,258	0	1,871