Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating expenses
Research and development	$ 57,808	$ 114,935
Sales and marketing	5,065	6,186
General and administrative	26,513	27,880
Loss on disposal of property and equipment	3,698	0
Change in fair value of earnout liability	2,764	0
Total operating expenses	95,848	149,001
Loss from operations	(95,848)	(149,001)
Change in fair value of notes payable and warrant liabilities	48,135	1,186
Loss on settlement of notes payable	(98,136)	0
Interest expense	(292)	(3,746)
Related party interest expense	0	(622)
Other income (expense), net	1,168	(915)
Loss before income taxes	(144,973)	(153,098)
Income tax provision	0	0
Net loss	(144,973)	(153,098)
Total comprehensive loss:
Net loss	(144,973)	(153,098)
Change in foreign currency translation adjustment	(555)	(564)
Total comprehensive loss	$ (145,528)	$ (153,662)
Class A Common Stock
Per share information (Note 15):
Net income (loss) per share of Common Stock attributable to common stockholders - basic (in dollars per share)	$ (0.20)	$ (0.48)
Net income (loss) per share of Common Stock attributable to common stockholders - diluted – diluted (in dollars per share)	$ (0.20)	$ (0.48)
Weighted average shares used in computing net income (loss) per share of Common Stock – basic (in shares)	721,566,030	322,211,392
Weighted average shares used in computing net income (loss) per share of Common Stock – diluted (in shares)	721,566,030	322,211,392
Class B Common Stock
Per share information (Note 15):
Net income (loss) per share of Common Stock attributable to common stockholders - basic (in dollars per share)	$ (0.20)	$ (0.48)
Net income (loss) per share of Common Stock attributable to common stockholders - diluted – diluted (in dollars per share)	$ (0.20)	$ (0.48)
Weighted average shares used in computing net income (loss) per share of Common Stock – basic (in shares)	721,566,030	322,211,392
Weighted average shares used in computing net income (loss) per share of Common Stock – diluted (in shares)	721,566,030	322,211,392