Regulatory Capital Matters - Summary of Actual and Required Capital Amounts and Ratios, Exclusive of Capital Conservation Buffer (Details) $ in Thousands	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total capital (to risk-weighted assets), Actual Amount	$ 189,697	$ 182,439
Tier 1 capital (to risk-weighted assets), Actual Amount	172,853	165,944
Common equity Tier 1 capital (to risk-weighted assets), Actual Amount	172,853	165,944
Tier 1 capital (to average assets), Actual Amount	$ 172,853	$ 165,944
Total capital (to risk-weighted assets), Actual Ratio	0.1329	0.1366
Tier 1 capital (to risk-weighted assets), Actual Ratio	0.1211	0.1242
Common equity Tier 1 capital (to risk-weighted assets), Actual Ratio	0.1211	0.1242
Tier 1 capital (to average assets), Actual Ratio	0.0980	0.0958
Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total capital (to risk-weighted assets), Actual Amount	$ 187,282	$ 179,882
Tier 1 capital (to risk-weighted assets), Actual Amount	170,437	163,387
Common equity Tier 1 capital (to risk-weighted assets), Actual Amount	170,437	163,387
Tier 1 capital (to average assets), Actual Amount	$ 170,437	$ 163,387
Total capital (to risk-weighted assets), Actual Ratio	0.1312	0.1347
Tier 1 capital (to risk-weighted assets), Actual Ratio	0.1194	0.1223
Common equity Tier 1 capital (to risk-weighted assets), Actual Ratio	0.1194	0.1223
Tier 1 capital (to average assets), Actual Ratio	0.0966	0.0944
Total capital (to risk-weighted assets), Amount, Required for Capital Adequacy Purposes	$ 114,191	$ 106,857
Tier 1 capital (to risk-weighted assets), Amount, Required for Capital Adequacy Purposes	85,643	80,143
Common equity Tier 1 capital (to risk-weighted assets), Amount, Required for Capital Adequacy Purposes	64,232	60,107
Tier 1 capital (to average assets), Amount, Required for Capital Adequacy Purposes	$ 70,553	$ 69,266
Total capital (to risk-weighted assets), Ratio, Required for Capital Adequacy Purposes	0.0800	0.0800
Tier 1 capital (to risk-weighted assets), Ratio, Required for Capital Adequacy Purposes	0.0600	0.0600
Common equity Tier 1 capital (to risk-weighted assets), Ratio, Required for Capital Adequacy Purposes	0.0450	0.0450
Tier 1 capital (to average assets), Ratio, Required for Capital Adequacy Purposes	0.0400	0.0400
Total capital (to risk-weighted assets), Amount, Minimum To be Considered "Well Capitalized"	$ 142,738	$ 133,572
Tier 1 capital (to risk-weighted assets), Amount, Minimum To be Considered "Well Capitalized"	114,191	106,857
Common equity Tier 1 capital (to risk-weighted assets), Amount, Minimum To be Considered "Well Capitalized"	92,780	86,822
Tier 1 capital (to average assets), Amount, Minimum To be Considered "Well Capitalized"	$ 88,192	$ 86,582
Total capital (to risk-weighted assets), Ratio, Minimum To be Considered "Well Capitalized"	0.1000	0.1000
Tier 1 capital (to risk-weighted assets), Ratio, Minimum To be Considered "Well Capitalized"	0.0800	0.0800
Common equity Tier 1 capital (to risk-weighted assets), Ratio, Minimum To be Considered "Well Capitalized"	0.0650	0.0650
Tier 1 capital (to average assets), Ratio, Minimum To be Considered "Well Capitalized"	0.0500	0.0500