CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Statement [Abstract]
Revenue (including revenue of $36,470 and $0 from a related party for the three months ended June 30, 2024 and 2023, and $87,836 and $0 for the six months ended June 30, 2024 and 2023, respectively)	$ 200,581	$ 150,874	$ 373,321	$ 300,306
Costs and expenses
Cost of revenue	470,355	555,805	875,151	1,056,329
Research and development	287,170	233,474	571,797	463,277
Selling, general and administrative	210,245	197,748	423,477	366,518
Restructuring charges	20,228	1,532	20,228	24,028
Total cost and expenses	987,998	988,559	1,890,653	1,910,152
Loss from operations	(787,417)	(837,685)	(1,517,332)	(1,609,846)
Other income (expense), net
Change in fair value of common stock warrant liability	7,539	42,133	34,593	1,331
Change in fair value of equity securities of a related party	(9,390)	0	(29,323)	0
Change in fair value of derivative liability associated with Series A redeemable convertible preferred stock (related party)	103,000	0	103,000	0
Interest income	54,553	39,525	105,184	79,530
Interest expense	(6,673)	(6,690)	(14,174)	(13,798)
Other expense, net	(5,067)	(928)	(6,074)	(261)
Total other income (expense), net	143,962	74,040	193,206	66,802
Loss before provision for (benefit from) income taxes	(643,455)	(763,645)	(1,324,126)	(1,543,044)
Provision for (benefit from) income taxes	(65)	587	123	716
Net loss	(643,390)	(764,232)	(1,324,249)	(1,543,760)
Accretion of Series A redeemable convertible preferred stock (related party)	(146,861)	0	(150,762)	0
Net loss attributable to common stockholders, basic	(790,251)	(764,232)	(1,475,011)	(1,543,760)
Net loss attributable to common stockholders, diluted	$ (790,251)	$ (764,232)	$ (1,475,011)	$ (1,543,760)
Weighted-average shares outstanding attributable to common stockholders, basic (in shares)	2,310,360,525	1,912,459,833	2,306,209,050	1,871,884,313
Weighted-average shares outstanding attributable to common stockholders, diluted (in shares)	2,310,360,525	1,912,459,833	2,306,209,050	1,871,884,313
Net loss per share attributable to common stockholders, basic (in dollars per share)	$ (0.34)	$ (0.40)	$ (0.64)	$ (0.82)
Net loss per share attributable to common stockholders, diluted (in dollars per share)	$ (0.34)	$ (0.40)	$ (0.64)	$ (0.82)
Other comprehensive income (loss)
Net unrealized gains (losses) on investments, net of tax	$ (957)	$ (2,999)	$ (4,219)	$ 1,036
Foreign currency translation adjustments	(802)	586	(4,790)	586
Total other comprehensive income (loss)	(1,759)	(2,413)	(9,009)	1,622
Comprehensive loss	(645,149)	(766,645)	(1,333,258)	(1,542,138)
Accretion of Series A redeemable convertible preferred stock (related party)	146,861	0	150,762	0
Comprehensive loss attributable to common stockholders	$ (792,010)	$ (766,645)	$ (1,484,020)	$ (1,542,138)