Basic and Diluted Net Loss per Share - Computation of Basic and Diluted Loss per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Oct. 31, 2022	Jul. 31, 2022	Apr. 30, 2022	Oct. 31, 2021	Jul. 31, 2021	Apr. 30, 2021	Oct. 31, 2022	Oct. 31, 2021
Numerator:
Net loss	$ (84,480)	$ (92,700)	$ (89,266)	$ (69,442)	$ (84,938)	$ 82,289	$ (266,446)	$ (72,092)
Cumulative dividends on redeemable convertible preferred stock	0			0			0	(4,292)
Deemed dividends attributable to vested option holders	0			0			0	(51,855)
Deemed dividends attributable to common stock warrant holders	0			0			0	(110,635)
Net loss attributable to common stockholders - Basic	(84,480)			(69,442)			(266,446)	(238,874)
Gain attributable to earnout shares issued	0			0			0	(84,420)
Change in fair value of dilutive warrants	0			0			0	(51,106)
Net loss attributable to common stockholders - Diluted	$ (84,480)			$ (69,442)			$ (266,446)	$ (374,400)
Denominator:
Weighted average common shares outstanding (in shares)	339,674,302			325,223,132			337,135,962	286,272,045
Less: Weighted-average unvested restricted shares and shares subject to repurchase (in shares)	(78,917)			(188,212)			(98,851)	(246,562)
Weighted average shares outstanding - basic (in shares)	339,595,385			325,034,920			337,037,111	286,025,483
Add: Earnout Shares under the treasury stock method (in shares)	0			0			0	4,948,794
Add: Public and Private Placement Warrants under the treasury stock method (in shares)	0			0			0	1,601,041
Weighted average shares outstanding - diluted (in shares)	339,595,385			325,034,920			337,037,111	292,575,318
Net loss per share - basic (in USD per share)	$ (0.25)			$ (0.21)			$ (0.79)	$ (0.84)
Net loss per share - diluted (in USD per share)	$ (0.25)			$ (0.21)			$ (0.79)	$ (1.28)