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Accrued expenses and other liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Accrued expenses and other liabilities    
Research and development $ 2,840 $ 9
Deferred research obligations 2,021  
Compensation and related benefits 1,246 845
Professional fees 227 417
Other 317 101
Accrued expenses and other liabilities $ 6,651 $ 1,372