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Leases - Schedule of Maturities of Operating Leases (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Jan. 02, 2019
Leases [Abstract]      
2021 $ 37    
Total operating lease payments 37    
Less imputed interest (1)    
Present value of operating lease liabilities $ 36 $ 3,300 $ 3,458