Equity Incentive Plans and Employee Stock Purchase Plan - Schedule of Stock Option Activity (Details) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Oct. 31, 2021 USD ($) $ / shares shares	Jan. 31, 2021 USD ($) $ / shares shares
Shares
Balance - beginning of period (in shares) | shares	3,881,545
Stock options exercised (in shares) | shares	(986,002)
Stock options forfeited and expired (in shares) | shares	(9,982)
Balance - end of period (in shares) | shares	2,885,561	3,881,545
Vested and exercisable (in shares) | shares	2,884,486	3,566,091
Weighted- Average Exercise Price Per Share
Balance - beginning of period (in dollars per share) | $ / shares	$ 7.50
Stock options exercised (in dollars per share) | $ / shares	7.73
Stock options forfeited and expired (in dollars per share) | $ / shares	10.95
Balance - end of period (in dollars per share) | $ / shares	7.41	$ 7.50
Vested and exercisable (in dollars per share) | $ / shares	$ 7.40	$ 7.22
Weighted- Average Remaining Contractual Term (In Years)
Balance	4 years 1 month 6 days	4 years 9 months 18 days
Vested and exercisable	4 years 1 month 6 days	4 years 8 months 12 days
Aggregate Intrinsic Value
Balance | $	$ 1,482,829	$ 1,405,540
Vested and exercisable | $	$ 1,482,299	$ 1,292,303