Accounts payable, accrued expenses, and other liabilities - Schedule of Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Other Liabilities Disclosure [Abstract]
Accounts payable and accrued expenses	$ 4,415	$ 2,389
Other liabilities, current
Accrued compensation	3,227	3,116
Accrued directors’ fees	39	41
Operating lease liability	31	9
Warrant liabilities	0	6
Total	$ 7,712	$ 5,561
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Total	Total
Other liabilities, non-current
Operating lease liability	$ 8	$ 0
Total	$ 8	$ 0
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Total	Total