Equity Incentive Plans - Summary of Activity Under the Equity Incentive Plans (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 31, 2021	Feb. 02, 2020
Options Outstanding, Number of Shares
Balance at start of year (in shares)	26,822,243
Options assumed in acquisition (in shares)	1,891,349
Options exercised (in shares)	(9,734,153)
Options cancelled/forfeited (in shares)	(420,465)
Balance at end of year (in shares)	18,558,974	26,822,243
Vested and exercisable (in shares)	16,016,719
Options Outstanding, Weighted- Average Exercise Price
Balance at start of year (in dollars per share)	$ 8.97
Options assumed in acquisition (in dollars per share)	1.75
Options exercised (in dollars per share)	6.11
Options cancelled/forfeited (in dollars per share)	14.77
Balance at end of year (in dollars per share)	9.60	$ 8.97
Vested and exercisable (in dollars per share)	$ 9.92
Weighted- Average Remaining Contractual Life (Years)
Weighted Average Remaining Contractual Life (Years)	4 years 3 months 18 days	3 years 10 months 24 days
Weighted Average Remaining Contractual Life (Years), Vested and exercisable	3 years 9 months 18 days
Aggregate Intrinsic Value (in thousands)
Aggregate Intrinsic Value	$ 251,503	$ 237,803
Aggregate Intrinsic Value, Vested and exercisable	$ 211,566