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Accrued Expenses (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Accrued Expenses    
External research and development $ 3,178 $ 2,794
Personnel related 5,413 5,145
Professional and consulting services 1,536 491
Other 200 321
Total accrued expenses $ 10,327 $ 8,751