Income Tax - Loss (Income) Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Line Items]
Loss (income) before income taxes	$ 257,103	$ 334,620	$ 443,286
Cayman Islands
Income Tax Disclosure [Line Items]
Loss (income) before income taxes	(2,453)	(16,792)	19,454
British Virgin Islands
Income Tax Disclosure [Line Items]
Loss (income) before income taxes	0	0	2
Mainland China
Income Tax Disclosure [Line Items]
Loss (income) before income taxes	146,725	253,274	290,056
Hong Kong
Income Tax Disclosure [Line Items]
Loss (income) before income taxes	1,808	4,483	53,425
United States
Income Tax Disclosure [Line Items]
Loss (income) before income taxes	110,422	92,869	79,620
Australia
Income Tax Disclosure [Line Items]
Loss (income) before income taxes	19	14	(260)
Taiwan
Income Tax Disclosure [Line Items]
Loss (income) before income taxes	$ 582	$ 772	$ 989