Quarterly report pursuant to Section 13 or 15(d)

Accrued and Other Current Liabilities - Schedule of Accrued and Other Current Liabilities (Details)

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Accrued and Other Current Liabilities - Schedule of Accrued and Other Current Liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Payables And Accruals [Abstract]    
Research and development services $ 2,446 $ 1,294
General and administrative services 108 160
Compensation expense 1,710 2,445
Other 52 38
Accrued and other current liabilities $ 4,316 $ 3,937