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Commitments and Contingencies - Schedule of Future Minimum Lease Payments Related to Non-cancellable Operating Lease Commitments (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Jan. 01, 2019
Operating Leases Future Minimum Payments Due [Abstract]      
Operating lease cost $ 107 $ 224  
Operating lease - operating cash flows $ 253 $ 246  
Weighted average remaining lease term 1 year 6 months 3 years 18 days  
Weighted average discount rate 7.20% 15.10%  
2021 $ 63    
2022 32    
Total future minimum lease payments 95    
Less imputed interest (4)    
Total liability 91 $ 637 $ 700
Current operating lease liability 59 172  
Non-current operating lease liability 32 465  
Total $ 91 $ 637 $ 700