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Accrued expenses and other liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Accrued expenses and other liabilities    
Research and development $ 2,514 $ 2,840
Compensation and related benefits 1,367 1,246
Professional fees 236 227
Short-term operating lease liability and other liabilities 91 317
Deferred research obligations 22 2,021
Accrued expenses and other liabilities $ 4,230 $ 6,651