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Accrued Expenses - Schedule of Accrued Expenses (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Payables And Accruals [Abstract]    
Clinical Expenses $ 2,580 $ 2,497
Compensation, excluding taxes 3,933 3,525
Professional fees 361 263
Other 550 662
Total accrued expenses $ 7,424 $ 6,947