Net Loss per Share - Summary of Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Numerator:
Net loss	$ (41,459)	$ (43,433)	$ (144,348)
Dividend on series A convertible preferred stock	(10,911)
Accretion of series A convertible preferred stock	(1,508)
Net loss attributable to common stockholders	$ (53,878)	$ (43,433)	$ (144,348)
Denominator:
Weighted-average shares used to compute net loss per share attributable to common stockholders, basic and diluted	155,598	155,849	147,762
Net loss per share attributable to common stockholders, basic and diluted	$ (0.35)	$ (0.28)	$ (0.98)