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Commitments and Contingencies (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Commitments and Contingencies [Abstract]      
Total rental expenses $ 1,275 $ 1,049 $ 878
Maturities of Time Deposits [Abstract]      
2021 43,489    
2022 7,158    
2023 3,567    
2024 2,307    
2025 69    
Time deposits, Total $ 56,590