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Borrowings (Details) - USD ($)
1 Months Ended 12 Months Ended
Sep. 30, 2016
Dec. 31, 2019
Dec. 31, 2018
Outstanding Borrowings [Abstract]      
Long-term Federal Home Loan Bank Advances   $ 35,000,000 $ 73,500,000
Commercial Note Payable [Member]      
Debt Instrument [Line Items]      
Amount of loan borrowed $ 3,500,000    
Term of loan 8 years    
Interest at a fixed rate   4.25%  
Period of fixed interest rate 36 months    
Amortization period, FHLB Rate 5 years    
Quarterly principal payment $ 175,000    
Outstanding Borrowings [Abstract]      
Long-term Federal Home Loan Bank Advances     $ 3,500,000
Weighted-average interest rate at year-end     4.25%
Maximum outstanding at any month-end   $ 3,500,000 $ 3,500,000
Average outstanding   $ 3,433,000 $ 3,500,000
Weighted-average interest rate during the year   4.20% 5.04%
Commercial Note Payable [Member] | Wall Street Journal Prime plus [Member]      
Debt Instrument [Line Items]      
Debt instrument variable rate 50.00%    
FHLB of Atlanta [Member]      
Debt Instrument [Line Items]      
Collateral pledge percentage to total assets for all borrowings   30.00%  
Credit availability under the FHLB   $ 246,700,000  
Outstanding Borrowings [Abstract]      
Long-term Federal Home Loan Bank Advances   $ 35,000,000 $ 70,000,000
Weighted-average interest rate at year-end   1.92% 2.27%
Maximum outstanding at any month-end   $ 70,000,000 $ 96,000,000
Average outstanding   $ 50,897,000 $ 87,669,000
Weighted-average interest rate during the year   1.74% 2.17%
Interest rate on maturities of long-term advances [Abstract]      
2022 Maturity, Rate   2.19%  
Maturities of long-term advances [Abstract]      
2020 Maturity, Amount   $ 25,000,000  
2022 Maturity, Amount   10,000,000  
Long-term advances Maturity, Amount   35,000,000  
Loans pledged as collateral   $ 158,900,000  
FHLB of Atlanta [Member] | Minimum [Member]      
Interest rate on maturities of long-term advances [Abstract]      
2020 Maturity, Rate   1.75%  
FHLB of Atlanta [Member] | Maximum [Member]      
Debt Instrument [Line Items]      
Long-term borrowings maturities period   20 years  
Interest rate on maturities of long-term advances [Abstract]      
2020 Maturity, Rate   1.92%