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Accrued Expenses (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Accrued Expenses    
Accrued compensation $ 1,407 $ 1,958
Accrued contracted costs 1,349 760
Accrued professional fees 604 268
Accrued other 297 295
Total $ 3,657 $ 3,281