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Accrued Expenses and Other Current Liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Accrued Expenses and Other Current Liabilities    
Compensation and related benefits $ 4,026 $ 3,666
Interest   40
Third-party and professional fees 1,993 1,626
Amounts due to Aroa 780 498
Research and development expenses 48 7
Other 196 116
Total accrued expenses and other current liabilities $ 7,043 $ 5,953