Net Loss per Share Attributable to Common Stockholders - Summary of Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021
Numerator:
Net income (loss)	$ 1,045	$ (8,700)	$ (3,654)	$ (23,273)
Accretion and dividend on series A convertible preferred stock	(4,304)	(3,785)	(8,526)	(3,785)
Net loss attributable to common stockholders	$ (3,259)	$ (12,485)	$ (12,180)	$ (27,058)
Denominator:
Weighted-average number of shares used to compute net loss per share attributable to common stockholders, basic	143,739	161,163	144,224	161,443
Weighted-average number of shares used to compute net loss per share attributable to common stockholders, diluted	143,739	161,163	144,224	161,443
Net loss per share attributable to common stockholders, basic	$ (0.02)	$ (0.08)	$ (0.08)	$ (0.17)
Net loss per share attributable to common stockholders, diluted	$ (0.02)	$ (0.08)	$ (0.08)	$ (0.17)