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Commitments and Contingencies - Schedule of Future Minimum Payments under Facility Operating Lease (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Jan. 01, 2019
Commitments And Contingencies Disclosure [Abstract]    
Total future lease payments $ 187  
Less: imputed interest (21)  
Present value of lease liabilities $ 166 $ 400