Condensed Consolidated Statements of Cash Flows - Unaudited - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash flows from operating activities
Net loss before noncontrolling interest	$ (114,852)	$ (113,723)
Adjustments to reconcile net loss before noncontrolling interest to net cash flows used in operating activities:
Depreciation and amortization	3,858	2,707
Equity-based compensation	22,424	37,216
Gain on marketable securities, net	(5,521)	(3,675)
Impairment charges	5,324	0
Loss on disposal of equipment	186	21
Changes in operating assets and liabilities:
Interest receivable	(3,728)	(714)
Prepaid and other assets	(8,489)	5,094
Accounts payable and accrued expenses	(114)	7,774
Income taxes payable	(1,268)	615
Net cash flows used in operating activities	(102,180)	(64,685)
Cash flows from investing activities
Purchases of marketable securities	(277,291)	(301,701)
Sales and maturities of marketable securities	286,625	100,187
Purchase of equipment and facility expansion	(4,000)	(32,625)
Net cash flows provided by (used in) investing activities	5,334	(234,139)
Cash flows from financing activities
Proceeds from sales of Class A ordinary shares, net of offering costs	144,325	0
Payments on finance leases	(40)	(39)
Net cash flows provided by (used in) financing activities	144,285	(39)
Net change in cash and cash equivalents	47,439	(298,863)
Cash, beginning of period	60,649	490,252
Cash, end of period	108,088	191,389
Supplemental disclosure of non-cash investing and financing activities:
Right of use assets obtained in exchange for lease obligations	2,621	714
Exchange of Class B ordinary shares	15,357	64
Impact of equity transactions and compensation on redeemable noncontrolling interest	18,748	3,207
Change in redemption value of noncontrolling interest	0	79
Equipment and facility expansion included in accounts payable and accrued expenses	$ 910	$ 1,386