Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Revenues
Auto sales	$ 784	$ 0
Cost of revenues
Auto sales	42,607	0
Gross loss	(41,823)	0
Operating expenses
Research and development	132,021	299,989
Sales and marketing	22,836	21,689
General and administrative	82,888	112,771
Loss on disposal of property and equipment	4,453	2,695
Change in fair value of earnout liability	2,033	0
Total operating expenses	244,231	437,144
Loss from operations	(286,054)	(437,144)
Loss on settlement of notes payable	(237,064)	(73,204)
Other expense, net	(2,437)	(11,878)
Loss before income taxes	(431,635)	(602,178)
Income tax provision	(109)	(61)
Net loss	(431,744)	(602,239)
Total comprehensive loss
Net loss	(431,744)	(602,239)
Foreign currency translation adjustment	2,357	10,450
Total comprehensive loss	$ (429,387)	$ (591,789)
Class A Common Stock
Net loss per share of Class A and B Common Stock attributable to common stockholders:
Basic (in dollars per share)	$ (44.81)	$ (393.56)
Diluted (in dollars per share)	$ (44.81)	$ (393.56)
Weighted average shares used in computing net loss per share of Class A and B Common Stock:
Basic (in shares)	9,634,759	1,530,227
Diluted (in shares)	9,634,759	1,530,227
Class B Common Stock
Net loss per share of Class A and B Common Stock attributable to common stockholders:
Basic (in dollars per share)	$ (44.81)	$ (393.56)
Diluted (in dollars per share)	$ (44.81)	$ (393.56)
Weighted average shares used in computing net loss per share of Class A and B Common Stock:
Basic (in shares)	9,634,759	1,530,227
Diluted (in shares)	9,634,759	1,530,227
Related Party
Operating expenses
Change in fair value of notes payable and warrant liabilities	$ 7,101	$ 0
Loss on settlement of notes payable	(20,045)	0
Interest expense	(753)	(3,879)
Nonrelated Party
Operating expenses
Change in fair value of notes payable and warrant liabilities	89,860	(70,512)
Loss on settlement of notes payable	(217,019)	(73,204)
Interest expense	$ (2,288)	$ (5,561)