Loans and Allowance for Loan Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Composition of the loan portfolio
Total loans	$ 488,435	$ 514,392
Commercial
Composition of the loan portfolio
Total loans	$ 77,071	$ 112,440
Percentage of loans	15.80%	21.90%
Commercial real estate
Composition of the loan portfolio
Total loans	$ 292,150	$ 303,804
Percentage of loans	59.80%	59.00%
Residential real estate
Composition of the loan portfolio
Total loans	$ 89,709	$ 69,845
Percentage of loans	18.40%	13.60%
Consumer | Home equity
Composition of the loan portfolio
Total loans	$ 25,578	$ 25,076
Percentage of loans	5.20%	4.90%
Consumer | Other
Composition of the loan portfolio
Total loans	$ 3,927	$ 3,227
Percentage of loans	0.80%	0.60%