Stockholders’ Equity and Equity Incentive Plans - Summary of Stock Option Activity Under Equity Incentive Plan (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
	Apr. 30, 2021	Jul. 31, 2021	Jan. 31, 2021
Outstanding Stock Options
Beginning balance (in shares)	9,239,504	9,239,504
Granted (in shares)		0
Exercised (in shares)		(1,593,193)
Cancelled/forfeited/expired (in shares)		(95,621)
Ending balance (in shares)		7,550,690
Weighted- Average Exercise Price
Beginning balance (in dollars per share)	$ 7.17	$ 7.17
Granted (in dollars per share)		0
Exercised (in dollars per share)		5.03
Cancelled/forfeited/expired (in dollars per share)		10.63
Ending balance (in dollars per share)		$ 7.58
Weighted- Average Remaining Contractual Life (Years)	7 years	6 years 6 months
Options outstanding, aggregate intrinsic value		$ 2,797,668	$ 3,371,457
Outstanding stock options, vested and exercisable (in shares)		4,851,663
Weighted average exercise price, vested and exercisable (in dollars per share)		$ 4.69
Weighted-average remaining contractual life (years), vested and exercisable		6 years 2 months 12 days
Options outstanding, aggregate intrinsic value, vested and exercisable		$ 1,811,636