Accrued Expenses (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Accrued Expenses
Employee compensation expenses	$ 2,740	$ 4,979
Research and development expenses	1,839	2,173
Deferred transaction consideration	5,416	3,927
Licensing expenses	1,147	8,645
Restructuring expenses (Note 13)		163
Other expenses	269	446
Total accrued expenses	$ 11,411	$ 20,333