Regulatory Matters (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Common Equity Tier 1 Capital (to risk-weighted assets) [Abstract]
Common Equity Tier I Capital Actual, Amount	$ 105,721	$ 98,970
Common Equity Tier I Capital, Ratio	16.50%	16.50%
Common Equity Tier I Capital for Capital Adequacy Purposes, Amount	$ 28,904	$ 26,983
Common Equity Tier I Capital for Capital Adequacy Purposes, Ratio	4.50%	4.50%
Common Equity Tier 1 Capital with Capital Conservation Buffer, Amount	$ 36,933	$ 30,730
Common Equity Tier 1 Capital with Capital Conservation Buffer, Ratio	5.80%	5.10%
Common Equity Tier I Capital To be Well Capitalized Under Prompt Corrective Action Provision, Amount	$ 41,750	$ 38,975
Common Equity Tier I Capital To be Well Capitalized Under Prompt Corrective Action Provision, Ratio	6.50%	6.50%
Total Capital (to risk-weighted assets) [Abstract]
Total Capital, Actual Amount	$ 113,758	$ 106,517
Total Capital, Ratio	17.70%	17.80%
Total Capital for Capital Adequacy Purposes, Amount	$ 51,385	$ 47,969
Total Capital for Capital Adequacy Purposes, Ratio	8.00%	8.00%
Total Capital with Capital Conservation Buffer, Amount	$ 59,414	$ 51,717
Total Capital with Capital Conservation Buffer, Ratio	9.30%	8.60%
Total Capital To be Well Capitalized Under Prompt Corrective Action Provision, Amount	$ 64,231	$ 59,962
Total Capital To be Well Capitalized Under Prompt Corrective Action Provision, Ratio	10.00%	10.00%
Tier 1 Capital (to risk-weighted assets) [Abstract]
Tier I Capital Actual, Amount	$ 105,721	$ 98,970
Tier I Capital, Ratio	16.50%	16.50%
Tier I Capital for Capital Adequacy Purposes, Amount	$ 38,539	$ 35,977
Tier I Capital for Capital Adequacy Purposes, Ratio	6.00%	6.00%
Tier I Capital with Capital Conservation Buffer, Amount	$ 46,567	$ 39,725
Tier I Capital with Capital Conservation Buffer, Ratio	7.30%	6.60%
Tier I Capital To be Well Capitalized Under Prompt Corrective Action Provision, Amount	$ 51,385	$ 47,969
Tier I Capital To be Well Capitalized Under Prompt Corrective Action Provision, Ratio	8.00%	8.00%
Tier 1 Capital (to average quarterly assets) [Abstract]
Tier I Capital Average Actual, Amount	$ 105,721	$ 98,970
Tier I Capital Average, Ratio	13.50%	12.90%
Tier I Capital Average for Capital Adequacy Purposes, Amount	$ 31,440	$ 30,634
Tier I Capital Average for Capital Adequacy Purposes, Ratio	4.00%	4.00%
Tier I Capital Average with Capital Conservation Buffer, Amount	$ 41,264	$ 35,420
Tier I Capital Average with Capital Conservation Buffer, Ratio	5.30%	4.60%
Tier I Capital Average To be Well Capitalized Under Prompt Corrective Action Provision, Amount	$ 39,300	$ 38,292
Tier I Capital Average To be Well Capitalized Under Prompt Corrective Action Provision, Ratio	5.00%	5.00%