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Accrued Expenses and Other Current Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Payables and Accruals [Abstract]    
Accrued clinical expenses $ 2,522 $ 2,197
Accrued contract manufacturing expenses 2,485 1,840
Derivative liability for exit fee 698 1,376
Accrued professional and consulting services 597 243
Accrued sales and marketing expenses 256 593
Accrued interest expense 203 123
Other 605 285
Accrued liabilities and other liabilities $ 7,366 $ 6,657