Condensed Consolidated Statements of Cash Flows - Unaudited - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities
Net loss before noncontrolling interest	$ (35,333)	$ (36,909)
Adjustments to reconcile net loss before noncontrolling interest to net cash flows used in operating activities:
Depreciation and amortization	1,102	832
Equity-based compensation	7,679	13,020
Gain on marketable securities, net	(2,313)	(492)
Loss on disposal of equipment	28	3
Changes in operating assets and liabilities:
Interest receivable	(529)	(5,476)
Prepaid and other assets	564	3,483
Accounts payable and accrued expenses	(5,942)	(601)
Income taxes payable	98	148
Net cash flows used in operating activities	(34,646)	(25,992)
Cash flows used in investing activities
Purchases of marketable securities	(55,415)	(198,038)
Sales and maturities of marketable securities	114,774	6,412
Purchase of equipment and facility expansion	(960)	(986)
Net cash flows provided by (used in) investing activities	58,399	(192,612)
Cash flows from financing activities
Payments on finance leases	(13)	(13)
Net cash flows used in financing activities	(13)	(13)
Net change in cash and cash equivalents	23,740	(218,617)
Cash, beginning of period	60,649	490,252
Cash, end of period	84,389	271,635
Supplemental disclosure of non-cash investing and financing activities:
Right of use assets obtained in exchange for lease obligations	1,674	714
Exchange of Class B ordinary shares	2,289	0
Impact of equity transactions and compensation on redeemable noncontrolling interest	(7,507)	1,352
Change in redemption value of noncontrolling interest	0	509,526
Equipment and facility expansion included in accounts payable and accrued expenses	$ (305)	$ 744