Basic and Diluted Net Loss per Share - Computation of Basic and Diluted Loss per Share (Details) - USD ($)	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Numerator:
Net income (loss)	$ (345,108,000)	$ (132,241,000)	$ (197,024,000)
Accretion of beneficial conversion feature of redeemable convertible preferred stock	0	0	(60,377,000)
Cumulative undeclared dividends on redeemable convertible preferred stock	0	(4,292,000)	(16,799,000)
Deemed dividends attributable to vested option holders	0	(51,855,000)	0
Deemed dividends attributable to common stock warrant holders	0	(110,635,000)	0
Net loss attributable to common stockholders - Basic	(345,108,000)	(299,023,000)	(274,200,000)
Gain attributable to earnout shares issued	0	(84,420,000)	0
Change in fair value of dilutive warrants	0	(68,223,000)	0
Net loss attributable to common stockholders - Diluted	$ (345,108,000)	$ (451,666,000)	$ (274,200,000)
Denominator:
Weighted average common shares outstanding (in shares)	338,576,326	297,642,999	15,116,763
Less: Weighted-average unvested restricted shares and shares subject to repurchase (in shares)	(87,659)	(221,030)	0
Weighted average shares outstanding - Basic (in shares)	338,488,667	297,421,969	15,116,763
Add: Earnout Shares under the treasury stock method (in shares)	0	3,701,427	0
Add: Public and Private Placement Warrants under the treasury stock method (in shares)	0	1,366,870	0
Weighted average shares outstanding - Diluted (in shares)	338,488,667	302,490,266	15,116,763
Net loss per share - Basic (USD per share)	$ (1.02)	$ (1.01)	$ (18.14)
Net loss per share - Diluted (USD per share)	$ (1.02)	$ (1.49)	$ (18.14)