Loans and Allowance for Loan Losses (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Composition of the loan portfolio
Total loans	$ 466,448	$ 487,490
Commercial
Composition of the loan portfolio
Total loans	$ 74,015	$ 113,341
Percentage of loans	15.90%	23.30%
Commercial real estate
Composition of the loan portfolio
Total loans	$ 298,790	$ 283,135
Percentage of loans	64.00%	58.10%
Residential real estate
Composition of the loan portfolio
Total loans	$ 64,368	$ 62,071
Percentage of loans	13.80%	12.70%
Consumer | Home equity
Composition of the loan portfolio
Total loans	$ 25,665	$ 26,018
Percentage of loans	5.50%	5.30%
Consumer | Other
Composition of the loan portfolio
Total loans	$ 3,610	$ 2,925
Percentage of loans	0.80%	0.60%