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Accrued and Other Current Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Accrued and Other Current Liabilities    
Accrued research and development $ 476 $ 946
Accrued payroll and other employee benefits 258 192
Deferred offering costs 297  
Other 120 18
Total accrued and other current liabilities $ 1,151 $ 1,156