CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Cash flows from operating activities:
Net loss	$ (905,603)	$ (1,324,249)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	209,047	135,021
Amortization of insurance premium	17,485	17,314
Non-cash operating lease cost	19,758	15,136
Stock-based compensation	83,834	120,709
Inventory and firm purchase commitments write-downs	327,806	277,541
Change in fair value of common stock warrant liability	(18,183)	(34,593)
Change in fair value of equity securities of a related party	9,505	29,323
Change in fair value of derivative liabilities associated with redeemable convertible preferred stock (related party)	(393,175)	(103,000)
Net accretion of investment discounts/premiums	(19,062)	(44,308)
Gain on extinguishment of debt	(116,360)	0
Other non-cash items	9,300	4,944
Changes in operating assets and liabilities:
Accounts receivable (including $(5,599) and $(42,282) from a related party for the six months ended June 30, 2025 and 2024, respectively)	(13,260)	(49,612)
Inventory	(586,043)	(83,410)
Prepaid expenses	(27,677)	(19,269)
Other current assets	12,425	(22,310)
Other noncurrent assets	(68,249)	(23,392)
Accounts payable	58,513	3,181
Other current liabilities	117,921	5,520
Other long-term liabilities	23,164	71,722
Net cash used in operating activities	(1,258,854)	(1,023,732)
Cash flows from investing activities:
Purchases of property, plant and equipment (including $(67,668) and $(34,068) from a related party for the six months ended June 30, 2025 and 2024, respectively)	(343,904)	(432,512)
Purchases of investments (including $(30,000) and nil from a related party for the six months ended June 30, 2025 and 2024, respectively)	(309,557)	(1,854,127)
Proceeds from maturities of investments	1,961,485	2,287,894
Proceeds from sale of investments	0	5,000
Net cash provided by investing activities	1,308,024	6,255
Cash flows from financing activities:
Payment for finance lease liabilities	(1,376)	(1,929)
Proceeds from convertible debt	1,100,000	0
Purchase of capped call options	(118,250)	0
Repurchase of 2026 Notes	(931,433)	0
Proceeds from borrowings from a related party	106,645	0
Repayment of borrowings to a related party	0	(4,266)
Proceeds from exercise of stock options	1,274	2,311
Proceeds from employee stock purchase plan	12,696	11,104
Tax withholding payments for net settlement of employee awards	(9,449)	(5,312)
Net cash provided by financing activities	141,676	999,565
Net increase (decrease) in cash, cash equivalents, and restricted cash	190,846	(17,912)
Beginning cash, cash equivalents, and restricted cash	1,607,052	1,371,507
Ending cash, cash equivalents, and restricted cash	1,797,898	1,353,595
Supplemental disclosure of cash flow information:
Cash paid for interest, net of amounts capitalized	16,387	11,587
Cash paid for taxes	3,405	42
Supplemental disclosure of non-cash investing and financing activity:
Increases (decreases) in purchases of property, plant and equipment included in accounts payable and other current liabilities	12,399	(14,310)
Government grant (related party) reflected in property, plant and equipment	0	(32,640)
Property, plant and equipment and right-of-use assets obtained through leases	143,403	7,392
Nonrelated Party
Cash flows from financing activities:
Payments of transaction costs and credit facility issuance costs to a related party	(17,924)	0
Related Party
Changes in operating assets and liabilities:
Accounts receivable (including $(5,599) and $(42,282) from a related party for the six months ended June 30, 2025 and 2024, respectively)	(5,599)	(42,282)
Cash flows from investing activities:
Purchases of property, plant and equipment (including $(67,668) and $(34,068) from a related party for the six months ended June 30, 2025 and 2024, respectively)	(67,668)	(34,068)
Purchases of investments (including $(30,000) and nil from a related party for the six months ended June 30, 2025 and 2024, respectively)	(30,000)	0
Cash flows from financing activities:
Payments of transaction costs and credit facility issuance costs to a related party	(507)	0
Series A Derivative Liability
Cash flows from financing activities:
Proceeds from issuance of Series A redeemable convertible preferred stock to a related party	0	1,000,000
Payments of issuance costs for Series A redeemable convertible preferred stock	0	(2,343)
Change in fair value of common stock warrant liability
Adjustments to reconcile net loss to net cash used in operating activities:
Change in fair value of common stock warrant liability	$ (18,183)	$ (34,593)