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	12 Months Ended
	Apr. 30, 2021	Jan. 31, 2021
Outstanding Stock Options
Beginning balance (in shares)	9,239,504
Granted (in shares)	0
Exercised (in shares)	(751,686)
Cancelled/forfeited/expired (in shares)	(66,838)
Ending balance (in shares)	8,420,980	9,239,504
Weighted- Average Exercise Price
Beginning balance (in dollars per share)	$ 7.17
Granted (in dollars per share)	0
Exercised (in dollars per share)	4.48
Cancelled/forfeited/expired (in dollars per share)	5.05
Ending balance (in dollars per share)	$ 7.43	$ 7.17
Weighted- Average Remaining Contractual Life (Years)	6 years 9 months 18 days	7 years
Options outstanding, aggregate intrinsic value	$ 2,628,512	$ 3,371,457
Outstanding stock options, vested and exercisable (in shares)	4,853,741
Weighted average exercise price, vested and exercisable (in dollars per share)	$ 4.39
Weighted-average remaining contractual life (years), vested and exercisable	6 years 4 months 24 days
Options outstanding, aggregate intrinsic value, vested and exercisable	$ 1,529,787