Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue	$ 11,381	$ 5,515	$ 18,963	$ 9,800
Costs and expenses:
Cost of revenue (excluding depreciation and amortization)	5,623	1,901	9,037	2,937
Research and development	31,204	19,869	63,572	36,102
Sales and marketing	6,137	3,575	12,838	6,242
General and administrative	13,053	10,930	27,073	21,511
Depreciation and amortization	4,305	2,329	8,260	4,120
Total operating costs and expenses	60,322	38,604	120,780	70,912
Loss from operations	(48,941)	(33,089)	(101,817)	(61,112)
Gain (loss) on change in fair value of warrant liabilities	6,639	(15,537)	15,266	(19,147)
Interest income, net	4,801	4,877	9,600	9,108
Other income (expense), net	(45)	31	(179)	95
Loss before income tax expense	(37,546)	(43,718)	(77,130)	(71,056)
Income tax benefit (expense)	(15)	0	(23)	0
Net loss	$ (37,561)	$ (43,718)	$ (77,153)	$ (71,056)
Net loss per share attributable to common stockholders—basic	$ (0.18)	$ (0.22)	$ (0.37)	$ (0.35)
Net loss per share attributable to common stockholders—diluted	$ (0.18)	$ (0.22)	$ (0.37)	$ (0.35)
Weighted average shares used in computing net loss per share attributable to common stockholders—basic	211,637,479	201,431,494	209,898,459	200,775,817
Weighted average shares used in computing net loss per share attributable to common stockholders—diluted	211,637,479	201,431,494	209,898,459	200,775,817