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Accrued Expenses (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Accrued Expenses    
Accrued research and development expenses $ 5,923 $ 5,762
Accrued compensation and benefits 3,342 3,968
Accrued professional expenses 3,608 1,324
Accrued taxes 258 302
Other accrued expenses 241 136
Accrued expenses $ 13,372 $ 11,492