Quarterly report pursuant to Section 13 or 15(d)

Accrued Expenses - Schedule of Accrued Expenses (Details)

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Accrued Expenses - Schedule of Accrued Expenses (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Payables And Accruals [Abstract]    
Accrued clinical trial costs $ 93 $ 144
Accrued payroll and bonus expenses 717 966
Accrued manufacturing expenses 73 105
Accrued other expenses 1,194 614
Total $ 2,077 $ 1,829