XML 64 R53.htm IDEA: XBRL DOCUMENT v3.21.2
Accrued Expenses - Schedule of Accrued Expenses (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Payables And Accruals [Abstract]    
Accrued payroll and bonus expenses $ 769 $ 966
Accrued other expenses 416 614
Accrued clinical trial costs 33 144
Accrued manufacturing expenses 472 105
Total $ 1,690 $ 1,829