Consolidated Statements of Operations - USD ($)	12 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2022
Revenue
Total revenue	$ 506,639,000	$ 468,094,000	$ 241,006,000
Cost of revenue
Total cost of revenue	476,521,000	382,161,000	187,473,000
Gross profit	30,118,000	85,933,000	53,533,000
Operating expenses
Research and development	220,781,000	194,957,000	145,043,000
Sales and marketing	150,186,000	142,392,000	92,550,000
General and administrative	109,102,000	90,366,000	81,380,000
Total operating expenses	480,069,000	427,715,000	318,973,000
Loss from operations	(449,951,000)	(341,782,000)	(265,440,000)
Interest income	9,603,000	5,534,000	98,000
Interest expense	(16,273,000)	(9,434,000)	(1,502,000)
Change in fair value of contingent earnout liability	0	0	84,420,000
Transaction costs expensed	0	0	(7,031,000)
Other expense, net	(1,009,000)	(1,569,000)	(2,775,000)
Net loss before income taxes	(457,630,000)	(347,275,000)	(135,171,000)
Benefit from income taxes	(21,000)	(2,167,000)	(2,930,000)
Net loss	(457,609,000)	(345,108,000)	(132,241,000)
Cumulative undeclared dividends on redeemable convertible preferred stock	0	0	(4,292,000)
Deemed dividends attributable to vested option holders	0	0	(51,855,000)
Deemed dividends attributable to common stock warrant holders	0	0	(110,635,000)
Net loss attributable to common stockholders - Basic	(457,609,000)	(345,108,000)	(299,023,000)
Gain attributable to earnout shares issued	0	0	(84,420,000)
Change in fair value of dilutive warrants	0	0	(68,223,000)
Net loss attributable to common stockholders - Diluted	$ (457,609,000)	$ (345,108,000)	$ (451,666,000)
Weighted average shares outstanding - Basic (in shares)	375,529,883	338,488,667	297,421,969
Weighted average shares outstanding - Diluted (in shares)	375,529,883	338,488,667	302,490,266
Net loss per share - Basic (USD per share)	$ (1.22)	$ (1.02)	$ (1.01)
Net loss per share - Diluted (USD per share)	$ (1.22)	$ (1.02)	$ (1.49)
Redeemable convertible preferred stock warrant
Operating expenses
Change in fair value of warrant liabilities	$ 0	$ 0	$ 9,237,000
Common stock warrant
Operating expenses
Change in fair value of warrant liabilities	0	(24,000)	47,822,000
Networked charging systems
Revenue
Total revenue	360,822,000	363,622,000	173,850,000
Cost of revenue
Total cost of revenue	386,149,000	318,628,000	147,313,000
Subscriptions
Revenue
Total revenue	120,445,000	85,296,000	53,512,000
Cost of revenue
Total cost of revenue	73,595,000	51,416,000	31,190,000
Other
Revenue
Total revenue	25,372,000	19,176,000	13,644,000
Cost of revenue
Total cost of revenue	$ 16,777,000	$ 12,117,000	$ 8,970,000