CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Statement [Abstract]
Revenue (including $174,204, $43,714, and nil from a related party for the years ended December 31, 2024, 2023, and 2022, respectively)	$ 807,832	$ 595,271	$ 608,181
Costs and expenses
Cost of revenue	1,730,943	1,936,066	1,646,086
Research and development	1,176,453	937,012	821,512
Selling, general and administrative	900,952	797,235	734,574
Restructuring charges	20,304	24,546	0
Total cost and expenses	3,828,652	3,694,859	3,202,172
Loss from operations	(3,020,820)	(3,099,588)	(2,593,991)
Other income (expense), net
Change in fair value of common stock warrant liability	34,150	86,926	1,254,218
Change in fair value of equity securities of a related party	(43,057)	5,999	0
Change in fair value of derivative liabilities associated with redeemable convertible preferred stock (related party)	155,350	0	0
Interest income	213,026	204,274	56,756
Interest expense (including $6,980, $2,159, and $283 to a related party for the years ended December 31, 2024, 2023, and 2022, respectively)	(32,923)	(24,915)	(30,596)
Other income (expense), net	(18,469)	(90)	9,532
Total other income, net	308,077	272,194	1,289,910
Loss before provision for income taxes	(2,712,743)	(2,827,394)	(1,304,081)
Provision for income taxes	1,199	1,026	379
Net loss	(2,713,942)	(2,828,420)	(1,304,460)
Accretion of redeemable convertible preferred stock (related party)	(347,610)	0	0
Net loss attributable to common stockholders, basic	(3,061,552)	(2,828,420)	(1,304,460)
Change in fair value of dilutive warrants	0	0	(1,254,218)
Net loss attributable to common stockholders, diluted	$ (3,061,552)	$ (2,828,420)	$ (2,558,678)
Weighted-average shares outstanding attributable to common stockholders
Basic (in shares)	2,445,176,539	2,081,772,622	1,678,346,079
Diluted (in shares)	2,445,176,539	2,081,772,622	1,693,258,608
Net loss per share attributable to common stockholders
Basic (in dollars per share)	$ (1.25)	$ (1.36)	$ (0.78)
Diluted (in dollars per share)	$ (1.25)	$ (1.36)	$ (1.51)
Other comprehensive income (loss)
Net unrealized gains (losses) on investments, net of tax	$ 1,942	$ 12,669	$ (11,572)
Foreign currency translation adjustments	(8,891)	3,753	0
Total other comprehensive income (loss)	(6,949)	16,422	(11,572)
Comprehensive loss	(2,720,891)	(2,811,998)	(1,316,032)
Accretion of redeemable convertible preferred stock (related party)	(347,610)	0	0
Comprehensive loss attributable to common stockholders	$ (3,068,501)	$ (2,811,998)	$ (1,316,032)