Deposits (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Deposits    
Demand accounts $ 217,204 $ 131,228
Interest checking accounts 59,711 48,427
Money market accounts 147,467 99,955
Savings accounts 33,733 26,396
Other time deposits 99,422 114,875
Total $ 573,852 $ 443,208
Percentage of individual deposits to deposit liability    
Demand accounts (in hundredths) 37.90% 29.60%
Interest checking accounts(in hundredths) 10.40% 10.90%
Money market accounts (in hundredths) 25.70% 22.60%
Savings account (in hundredths) 5.90% 6.00%
Time deposits of $250,000 and over (in hundredths) 2.80% 5.00%
Other time deposits (in hundredths) 17.30% 25.90%
Total (in hundredths) 100.00% 100.00%
Geographic Distribution, Domestic [Member]    
Deposits    
Time deposits of $250,000 and over $ 16,315 $ 22,327