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Accrued Expenses - Schedule of Accrued Expenses (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Payables and Accruals [Abstract]    
Compensation $ 78 $ 94
Professional fees 101 73
Clinical trial expenses 10 56
Other expenses 136 180
Accrued expenses $ 325 $ 403