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Accrued expenses and other liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Accrued expenses and other liabilities    
Research and development $ 1,993 $ 2,261
Compensation and related benefits 827 1,874
Short-term operating lease liability and other liabilities 236 293
Professional fees 250 481
Deferred research obligations   22
Accrued expenses and other liabilities $ 3,306 $ 4,931