Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities
Net loss before noncontrolling interest	$ (163,335)	$ (135,447)	$ (148,135)
Adjustments to reconcile net loss before noncontrolling interest to net cash flows used in operating activities:
Depreciation and amortization	5,432	3,853	3,036
Equity-based compensation	29,372	30,846	74,469
Gain on marketable securities, net	(6,995)	(6,018)	0
Gain on lease disposition	(161)	0	0
Impairment charges	5,324	0	0
Loss on disposal of equipment	56	23	0
Changes in operating assets and liabilities
Interest receivable	(1,072)	(1,375)	0
Prepaid and other assets	(5,955)	4,648	(7,231)
Accounts payable and accrued expenses	11,592	11,639	494
Income taxes payable	(609)	1,762	278
Net cash flows used in operating activities	(126,351)	(90,069)	(77,089)
Cash flows from investing activities
Net cash from SCS	0	0	108
Purchases of marketable securities	(324,023)	(471,604)	0
Sales and maturities of marketable securities	373,946	175,818	0
Purchase of equipment and facility expansion	(29,509)	(34,197)	(1,846)
Net cash flows provided by (used in) investing activities	20,414	(329,983)	(1,738)
Cash flows from financing activities
Proceeds from sales of Class A ordinary shares, net of offering costs	144,322	0	0
Proceeds from Business Combination, including PIPE financing, net of associated costs of $37,856	0	0	542,503
Payments on finance leases	(54)	(52)	(32)
Borrowings under related party notes payable	0	0	35,000
Exercise of stock options	140	0	0
Repurchase of Class A ordinary shares Amount	0	(9,499)	0
Repayment of related party notes payable	0	0	(35,000)
Net cash contribution	0	0	6,050
Net cash flows provided by (used in) financing activities	144,408	(9,551)	548,521
Net change in cash and cash equivalents	38,471	(429,603)	469,694
Cash, beginning of period	60,649	490,252	20,558
Cash, end of period	99,120	60,649	490,252
Supplemental cash flow information:
Cash paid during the period for income taxes, net of refunds	73	2,857	1,950
Supplemental disclosure of non-cash investing and financing activities:
Right of use assets obtained in exchange for lease obligations	2,621	2,594	1,491
Exchange of Class B ordinary shares	15,442	9,500	0
Impact of equity transactions and compensation on redeemable noncontrolling interest	19,448	2,577	5,828
Change in redemption value of noncontrolling interest	0	79	0
Equipment and facility expansion included in accounts payable and accrued expenses	$ 347	$ 218	$ 51