Net Loss Per Share Attributable to Common Stockholders (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Aug. 31, 2021	May 31, 2021	Aug. 31, 2020	May 31, 2020	Aug. 31, 2021	Aug. 31, 2020
Net Loss Per Share Attributable to Common Stockholders
Net loss	$ (62,364)	$ (48,707)	$ (15,371)	$ (13,960)	$ (111,071)	$ (29,331)
Weighted-average shares used in computing net loss per share	64,404,223		33,029,147		61,332,729	20,277,416
Net loss per share attributable to common stockholders, basic and diluted	$ (0.97)		$ (0.47)		$ (1.81)	$ (1.45)