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Accrued expenses and other liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Accrued expenses and other liabilities    
Compensation and related benefits $ 2,261 $ 2,840
Research and development 1,874 1,246
Professional fees 481 227
Short-term operating lease liability and other liabilities 293 317
Deferred research obligations 22 2,021
Accrued expenses and other liabilities $ 4,931 $ 6,651