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Accrued expenses and other liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Accrued expenses and other liabilities    
Research and development $ 1,980 $ 2,261
Professional fees 1,649 481
Compensation and related benefits 907 1,874
Short-term operating lease liability and other liabilities 489 293
Deferred research obligations   22
Accrued expenses and other liabilities $ 5,025 $ 4,931