Net Loss per Share Attributable to Common Stockholders - Summary of Computation of Basic and Diluted Net Loss per Share Attributable to Common Stockholders (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2021	Feb. 02, 2020		Jan. 31, 2019	[2]
Earnings Per Share [Abstract]
Net loss	$ (282,076)	$ (200,987)		$ (178,362)	[1]
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted (in shares)	267,824	252,820	[2]	232,042
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share)	$ (1.05)	$ (0.79)	[2]	$ (0.77)

[1]

[2]