Capital (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Capital.
Total capital to risk weighted assets, Actual, Amount	$ 107,738	$ 90,958
Total capital to risk weighted assets, Actual, Ratio	17.83%	18.70%
Total capital to risk weighted assets, Required For Capital Adequacy Purposes, Amount	$ 48,335	$ 38,920
Total capital to risk weighted assets, Required For Capital Adequacy Purposes, Ratio	8.00%	8.00%
Total capital to risk weighted assets, For Capital Adequacy Purposes Including Capital Conservation Buffer, Amount	$ 63,439	$ 48,042
Total capital to risk weighted assets, For Capital Adequacy Purposes Including Capital Conservation Buffer, Ratio	10.50%	9.88%
Total capital to risk weighted assets, To be Well Capitalized Under Prompt Corrective Action Regulations, Amount	$ 60,418	$ 48,650
Total capital to risk weighted assets, To be Well Capitalized Under Prompt Corrective Action Regulations, Ratio	10.00%	10.00%
Tier 1 (core) capital to risk weighted assets, Actual, Amount	$ 100,748	$ 85,328
Tier 1 (core) capital to risk weighted assets, Actual, Ratio	16.68%	17.54%
Tier 1 (core) capital to risk weighted assets Required, For Capital Adequacy Purposes, Amount	$ 36,251	$ 29,190
Tier 1 (core) capital to risk weighted assets, Required For Capital Adequacy Purposes, Ratio	6.00%	6.00%
Tier 1 (core) capital to risk weighted assets, To be Well Capitalized Under Prompt Corrective Action Regulations, Amount	$ 51,356	$ 38,312
Tier 1 (core) capital to risk weighted assets, To be Well Capitalized Under Prompt Corrective Action Regulations, Ratio	8.50%	7.88%
Tier 1 (core) capital to risk weighted assets, For Capital Adequacy Purposes Including Capital Conservation Buffer, Amount	$ 48,335	$ 38,920
Tier 1 (core) capital to risk weighted assets, For Capital Adequacy Purposes Including Capital Conservation Buffer, Ratio	8.00%	8.00%
Tier 1 (common) capital to risk weighted assets, Actual, Amount	$ 100,748	$ 85,328
Tier 1 (common) capital to risk weighted assets, Actual, Ratio	16.68%	17.54%
Tier 1 (common) capital to risk weighted assets, Required For Capital Adequacy Purposes, Amount	$ 27,188	$ 21,893
Tier 1 (common) capital to risk weighted assets, Required For Capital Adequacy Purposes, Ratio	4.50%	4.50%
Tier 1 (common) capital to risk weighted assets, For Capital Adequacy Purposes Including Capital Conservation Buffer, Amount	$ 42,293	$ 31,014
Tier 1 (common) capital to risk weighted assets, For Capital Adequacy Purposes Including Capital Conservation Buffer, Ratio	7.00%	6.38%
Tier 1 (common) capital to risk weighted assets, To be Well Capitalized Under Prompt Corrective Action Regulations, Amount	$ 39,272	$ 31,623
Tier 1 (common) capital to risk weighted assets, To be Well Capitalized Under Prompt Corrective Action Regulations, Ratio	6.50%	6.50%
Tier 1 (core) capital to adjusted total assets, Actual, Amount	$ 100,748	$ 85,328
Tier 1 (core) capital to adjusted total assets, Actual, Ratio	13.50%	13.26%
Tier 1 (core) capital to adjusted total assets, Required For Capital Adequacy Purposes, Amount	$ 29,841	$ 25,733
Tier 1 (core) capital to adjusted total assets, Required For Capital Adequacy Purposes, Ratio	4.00%	4.00%
Tier 1 (core) capital to adjusted total assets, For Capital Adequacy Purposes Including Capital Conservation Buffer, Amount	$ 29,841	$ 25,733
Tier 1 (core) capital to adjusted total assets, For Capital Adequacy Purposes Including Capital Conservation Buffer, Ratio	4.00%	4.00%
Tier 1 (core) capital to adjusted total assets, To be Well Capitalized Under Prompt Corrective Action Regulations, Amount	$ 37,301	$ 32,166
Tier 1 (core) capital to adjusted total assets, To be Well Capitalized Under Prompt Corrective Action Regulations, Ratio	5.00%	5.00%