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Accrued Expenses (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Payables and Accruals [Abstract]    
External research and development expenses $ 5,637 $ 4,895
Payroll and related expenses 5,615 6,412
Professional fees 732 1,013
Other 494 748
Total accrued expenses $ 12,478 $ 13,068