Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Accrued Expenses
Employee compensation expenses	$ 5,295	$ 4,389
Research and development expenses	2,689	1,278
Litigation settlements (see Note 17)		2,650
Other	717	1,734
Total accrued expenses	$ 8,701	$ 10,051