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Commitments and Contingencies - Future Minimum Commitments due Under October 2020 Lease and 2021 Lease Agreement (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Commitments And Contingencies Disclosure [Abstract]    
2022 $ 131  
2023 127  
2024 93  
2025 96  
2026 100  
Thereafter 25  
Total remaining lease payments 572  
Less: imputed lease interest (89)  
Less: Current portion $ (100)  
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] us-gaap:OtherLiabilitiesCurrent  
Operating lease liability, net of current portion $ 383 $ 409