CONDENSED CONSOLIDATED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Underwriting Agreement	2023 Subscription Agreement	Series A Redeemable Convertible Preferred Stock	Series B Redeemable Convertible Preferred Stock	Common Stock	Common Stock Underwriting Agreement	Common Stock 2023 Subscription Agreement	Additional Paid-In Capital	Additional Paid-In Capital Underwriting Agreement	Additional Paid-In Capital 2023 Subscription Agreement	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2022						1,829,314,736
Beginning balance at Dec. 31, 2022	$ 4,349,701					$ 183			$ 11,752,138			$ (20,716)	$ (11,572)	$ (7,370,332)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(2,174,654)													(2,174,654)
Other comprehensive income (loss)	1,209												1,209
Tax withholding payments for net settlement of employee awards	(14,705)								(14,705)
Issuance of common stock upon vesting of employee RSUs (in shares)						11,607,793
Issuance of common stock upon vesting of employee RSUs	0					$ 2			(2)
Issuance of common stock under employee stock purchase plan (in shares)						2,287,592
Issuance of common stock under employee stock purchase plan	15,089								15,089
Issuance of common stock upon exercise of stock options (in shares)						6,827,738
Issuance of common stock upon exercise of stock options	7,321								7,321
Issuance of common stock (in shares)							173,544,948	265,693,703
Issuance of common stock		$ 1,184,224	$ 1,812,641				$ 17	$ 27		$ 1,184,207	$ 1,812,614
Stock-based compensation	225,189								225,189
Ending balance (in shares) at Sep. 30, 2023						2,289,276,510
Ending balance at Sep. 30, 2023	5,406,015					$ 229			14,981,851			(20,716)	(10,363)	(9,544,986)
Beginning balance (in shares) at Jun. 30, 2023						2,282,278,815
Beginning balance at Jun. 30, 2023	5,959,840					$ 228			14,904,370			(20,716)	(9,950)	(8,914,092)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(630,894)													(630,894)
Other comprehensive income (loss)	(413)												(413)
Tax withholding payments for net settlement of employee awards	(4,327)								(4,327)
Issuance of common stock upon vesting of employee RSUs (in shares)						5,172,059
Issuance of common stock upon vesting of employee RSUs	0					$ 1			(1)
Issuance of common stock upon exercise of stock options (in shares)						1,825,636
Issuance of common stock upon exercise of stock options	2,214								2,214
Stock-based compensation	79,595								79,595
Ending balance (in shares) at Sep. 30, 2023						2,289,276,510
Ending balance at Sep. 30, 2023	$ 5,406,015					$ 229			14,981,851			(20,716)	(10,363)	(9,544,986)
Beginning balance (in shares) at Dec. 31, 2023	0			0	0
Beginning balance at Dec. 31, 2023	$ 0			$ 0	$ 0
Increase (Decrease) in Temporary Equity [Roll Forward]
Issuance of Series redeemable convertible preferred stock, net of derivative liability and issuance costs (related party) (in shares)				100,000	75,000
Issuance of Series redeemable convertible preferred stock, net of derivative liability and issuance costs (related party)				$ 500,549	$ 451,683
Accretion of redeemable convertible preferred stock (related party)	$ 107,924
Ending balance (in shares) at Sep. 30, 2024	175,000			100,000	75,000
Ending balance at Sep. 30, 2024	$ 1,060,156			$ 591,897	$ 468,259
Beginning balance (in shares) at Dec. 31, 2023	2,299,253,664					2,299,253,664
Beginning balance at Dec. 31, 2023	$ 4,851,692					$ 230			15,066,080			(20,716)	4,850	(10,198,752)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(2,316,724)													(2,316,724)
Other comprehensive income (loss)	8,064												8,064
Tax withholding payments for net settlement of employee awards	(8,502)								(8,502)
Issuance of common stock upon vesting of employee RSUs (in shares)						30,766,957
Issuance of common stock upon vesting of employee RSUs	0					$ 4			(4)
Issuance of common stock under employee stock purchase plan (in shares)						4,601,557
Issuance of common stock under employee stock purchase plan	$ 11,104								11,104
Issuance of common stock upon exercise of stock options (in shares)	2,896,364					2,896,364
Issuance of common stock upon exercise of stock options	$ 3,246								3,246
Accretion of redeemable convertible preferred stock (related party)	(107,924)								(107,924)
Stock-based compensation	$ 242,764								242,764
Ending balance (in shares) at Sep. 30, 2024	2,337,518,542					2,337,518,542
Ending balance at Sep. 30, 2024	$ 2,683,720					$ 234			15,206,764			(20,716)	12,914	(12,515,476)
Beginning balance (in shares) at Jun. 30, 2024	100,000
Beginning balance at Jun. 30, 2024	$ 651,311
Increase (Decrease) in Temporary Equity [Roll Forward]
Issuance of Series redeemable convertible preferred stock, net of derivative liability and issuance costs (related party) (in shares)					75,000
Issuance of Series redeemable convertible preferred stock, net of derivative liability and issuance costs (related party)					$ 451,683
Accretion of redeemable convertible preferred stock (related party)	$ (42,838)
Ending balance (in shares) at Sep. 30, 2024	175,000			100,000	75,000
Ending balance at Sep. 30, 2024	$ 1,060,156			$ 591,897	$ 468,259
Beginning balance (in shares) at Jun. 30, 2024						2,318,685,904
Beginning balance at Jun. 30, 2024	3,515,897					$ 232			15,063,541			(20,716)	(4,159)	(11,523,001)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(992,475)													(992,475)
Other comprehensive income (loss)	17,073												17,073
Tax withholding payments for net settlement of employee awards	(3,190)								(3,190)
Issuance of common stock upon vesting of employee RSUs (in shares)						18,034,831
Issuance of common stock upon vesting of employee RSUs	0					$ 2			(2)
Issuance of common stock upon exercise of stock options (in shares)						797,807
Issuance of common stock upon exercise of stock options	935								935
Accretion of redeemable convertible preferred stock (related party)	42,838								42,838
Stock-based compensation	$ 102,642								102,642
Ending balance (in shares) at Sep. 30, 2024	2,337,518,542					2,337,518,542
Ending balance at Sep. 30, 2024	$ 2,683,720					$ 234			$ 15,206,764			$ (20,716)	$ 12,914	$ (12,515,476)