Accrued expenses (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Accrued Liabilities, Current [Abstract]
Accrued payroll and related expenses	$ 7,810	$ 8,807
Accrued research, development and non-clinical expenses	3,039	3,090
Accrued manufacturing expenses	2,950	2,566
Accrued clinical expenses	2,813	5,063
Accrued professional fees	817	936
Accrued restructuring expenses	0	1,047
Accrued other	353	389
Total	$ 17,782	$ 21,898