Regulatory Capital Matters (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Capital conservation buffer, percentage	2.10%
Common equity tier 1 to risk-weighted assets:
Actual capital, amount	$ 130,442,000	$ 157,659,000
Actual capital, ratio	8.10%	11.72%
Required capital adequacy, amount	$ 72,503,000	$ 60,533,000
Required capital adequacy, ratio	4.50%	4.50%
Required capital adequacy with capital conservation buffer, amount	$ 112,782,000	$ 94,163,000
Required capital adequacy with capital conservation buffer, ratio	7.00%	7.00%
Tier 1 capital to risk-weighted assets:
Actual capital, amount	$ 130,442,000	$ 157,659,000
Actual capital, ratio	8.10%	11.72%
Required capital adequacy, amount	$ 96,670,000	$ 80,711,000
Required capital adequacy, ratio	6.00%	6.00%
Required capital adequacy with capital conservation buffer, amount	$ 136,950,000	$ 114,341,000
Required capital adequacy, ratio	8.50%	8.50%
Total capital to risk-weighted assets:
Actual capital, amount	$ 188,258,000	$ 215,091,000
Actual capital, ratio	11.68%	15.99%
Required capital adequacy, amount	$ 128,894,000	$ 107,615,000
Required capital adequacy, ratio	8.00%	8.00%
Required capital adequacy with capital conservation buffer, amount	$ 169,173,000	$ 141,244,000
Required capital adequacy, ratio	10.50%	10.50%
Tier 1 capital to average assets (leverage ratio):
Actual capital, amount	$ 130,442,000	$ 157,659,000
Actual capital, ratio	7.08%	10.41%
Required capital adequacy, amount	$ 73,669,000	$ 60,580,000
Required capital adequacy, ratio	4.00%	4.00%
Required capital adequacy with capital conservation buffer, amount	$ 73,669,000	$ 60,580,000
Required capital adequacy with capital conservation buffer, ratio	4.00%	4.00%
Amount available for dividend payment without regulatory approval	$ 34,100,000
Bank
Common equity tier 1 to risk-weighted assets:
Actual capital, amount	$ 171,033,000	$ 165,199,000
Actual capital, ratio	10.62%	12.27%
Required capital adequacy, amount	$ 72,481,000	$ 60,568,000
Required capital adequacy, ratio	4.50%	4.50%
Required capital adequacy with capital conservation buffer, amount	$ 112,749,000	$ 94,217,000
Required capital adequacy with capital conservation buffer, ratio	7.00%	7.00%
Prompt corrective action provisions, amount	$ 104,695,000	$ 87,487,000
Prompt corrective action provisions, ratio	6.50%	6.50%
Tier 1 capital to risk-weighted assets:
Actual capital, amount	$ 171,033,000	$ 165,199,000
Actual capital, ratio	10.62%	12.27%
Required capital adequacy, amount	$ 96,642,000	$ 80,757,000
Required capital adequacy, ratio	6.00%	6.00%
Required capital adequacy with capital conservation buffer, amount	$ 136,909,000	$ 114,406,000
Required capital adequacy, ratio	8.50%	8.50%
Prompt corrective action provisions, amount	$ 128,856,000	$ 107,676,000
Prompt corrective action provisions, ratio	8.00%	8.00%
Total capital to risk-weighted assets:
Actual capital, amount	$ 184,402,000	$ 178,191,000
Actual capital, ratio	11.45%	13.24%
Required capital adequacy, amount	$ 128,856,000	$ 107,676,000
Required capital adequacy, ratio	8.00%	8.00%
Required capital adequacy with capital conservation buffer, amount	$ 169,123,000	$ 141,325,000
Required capital adequacy, ratio	10.50%	10.50%
Prompt corrective action provisions, amount	$ 161,070,000	$ 134,595,000
Prompt corrective action provisions, ratio	10.00%	10.00%
Tier 1 capital to average assets (leverage ratio):
Actual capital, amount	$ 171,033,000	$ 165,199,000
Actual capital, ratio	9.33%	10.96%
Required capital adequacy, amount	$ 73,356,000	$ 60,276,000
Required capital adequacy, ratio	4.00%	4.00%
Required capital adequacy with capital conservation buffer, amount	$ 73,356,000	$ 60,276,000
Required capital adequacy with capital conservation buffer, ratio	4.00%	4.00%
Prompt corrective action provisions, amount	$ 91,695,000	$ 75,345,000
Prompt corrective action provisions, ratio	5.00%	5.00%