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Commitments and Contingencies (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Commitments and Contingencies [Abstract]      
Total rental expenses $ 1,049 $ 878 $ 868
Maturities of Time Deposits [Abstract]      
2020 39,066    
2021 8,794    
2022 2,843    
2023 2,452    
2024 286    
Time deposits, Total $ 53,441