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Leases - Maturity Analysis of Lease Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Leases [Abstract]    
2022 $ 726  
2023 749  
2024 771  
2025 793  
2026 747  
Total undiscounted future lease payments 3,786  
Amount of lease payments representing interest (623)  
Total lease liabilities 3,163  
Short-term lease liabilities 514 $ 457
Long-term lease liabilities $ 2,649 $ 3,163