Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Current income tax provision
United Kingdom	$ 0	$ 0
Foreign	2,031	1,893
Total current expense:	2,031	1,893
Deferred income tax benefit:
United Kingdom	0	0
Foreign	(437)	(1,113)
Total deferred income tax benefit:	(437)	(1,113)
Total provision for income taxes	$ 1,594	$ 780