Consolidated Statements of Operations - USD ($)	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Revenue
Total revenue	$ 468,094,000	$ 241,006,000	$ 146,490,000
Cost of revenue
Total cost of revenue	382,161,000	187,473,000	113,541,000
Gross profit	85,933,000	53,533,000	32,949,000
Operating expenses
Research and development	194,957,000	145,043,000	75,017,000
Sales and marketing	142,392,000	92,550,000	53,002,000
General and administrative	90,366,000	81,380,000	25,922,000
Total operating expenses	427,715,000	318,973,000	153,941,000
Loss from operations	(341,782,000)	(265,440,000)	(120,992,000)
Interest income	5,534,000	98,000	315,000
Interest expense and amortization of debt discount and issuance cost	(9,434,000)	(1,502,000)	(3,253,000)
Change in fair value of contingent earnout liability	0	84,420,000	0
Transaction costs expensed	0	(7,031,000)	0
Other income (expense), net	(1,569,000)	(2,775,000)	229,000
Net loss before income taxes	(347,275,000)	(135,171,000)	(196,826,000)
Provision (benefit) for income taxes	(2,167,000)	(2,930,000)	198,000
Net 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)
Weighted average shares outstanding - Basic (in shares)	338,488,667	297,421,969	15,116,763
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)
Redeemable convertible preferred stock warrant
Operating expenses
Change in fair value of warrant liabilities	$ 0	$ 9,237,000	$ (73,125,000)
Common stock warrant
Operating expenses
Change in fair value of warrant liabilities	(24,000)	47,822,000	0
Networked charging systems
Revenue
Total revenue	363,622,000	173,850,000	91,893,000
Cost of revenue
Total cost of revenue	318,628,000	147,313,000	87,083,000
Subscriptions
Revenue
Total revenue	85,296,000	53,512,000	40,563,000
Cost of revenue
Total cost of revenue	51,416,000	31,190,000	20,385,000
Other
Revenue
Total revenue	19,176,000	13,644,000	14,034,000
Cost of revenue
Total cost of revenue	$ 12,117,000	$ 8,970,000	$ 6,073,000