Accrued expenses and other current liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Payables and Accruals [Abstract]
Payroll and other employee benefits	$ 862			$ 155
Professional fees	1,379			108
Research and development costs	1,895			0
Operating lease liabilities, current portion	2,240			209
Other accrued expenses	598			53
Total accrued expenses and other current liabilities	$ 6,974	$ 2,392	$ 806	$ 525
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Total accrued expenses and other current liabilities			Total accrued expenses and other current liabilities