Accrued expenses and other liabilities - Summary of accrued expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Accrued expenses and other liabilities.
Payroll and bonuses	$ 3,139	$ 7,062
Interest	122	117
Accrued clinical trial related costs		314
Professional and legal fees	2,432	1,637
Operating lease liability, current	$ 579	$ 475
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accrued Expenses And Other Liabilities, Current	Accrued Expenses And Other Liabilities, Current
Other	$ 259	$ 236
Total accrued expenses and other liabilities	$ 6,531	$ 9,841