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Accrued Liabilities - Summary of Accrued Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Payables and Accruals [Abstract]    
Employee-related liabilities $ 619 $ 187
Accrued expenses from the merger 131 131
Accrued expenses 264 464
Total Accrued Liabilities $ 883 $ 795