Stockholders’ Equity and Equity Incentive Plans - Summary of Restricted Stock Units Activity Under Equity Incentive Plan (Details) - RSUs	3 Months Ended
	Apr. 30, 2022 $ / shares shares
Unvested RSUs
Beginning balance (in shares) | shares	5,546,366
Granted (in shares) | shares	4,948,266
Vested (in shares) | shares	(467,160)
Cancelled/forfeited (in shares) | shares	(342,851)
Ending balance (in shares) | shares	9,684,621
Weighted- Average Grant Date Fair Value Per Share
Beginning balance (in dollars per share) | $ / shares	$ 232.58
Granted (in dollars per share) | $ / shares	108.15
Vested (in dollars per share) | $ / shares	230.67
Cancelled/forfeited (in dollars per share) | $ / shares	192.07
Ending balance (in dollars per share) | $ / shares	$ 170.51