Regulatory Capital Matters - Schedule of Actual and Required Capital Amounts and Ratios, Exclusive of Capital Conservation Buffer (Details) $ in Thousands	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total capital (to risk-weighted assets), actual amount	$ 227,275	$ 213,862
Tier 1 capital (to risk-weighted assets), actual amount	206,350	194,358
Common equity Tier 1 capital (to risk-weighted assets), actual amount	206,350	194,358
Tier 1 capital (to average assets), actual amount	$ 206,350	$ 194,358
Total capital (to risk-weighted assets), actual ratio	0.1331	0.1306
Tier 1 capital (to risk-weighted assets), actual ratio	0.1209	0.1187
Common equity Tier 1 capital (to risk-weighted assets), actual ratio	0.1209	0.1187
Tier 1 capital (to average assets), actual ratio	0.0963	0.0938
Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total capital (to risk-weighted assets), actual amount	$ 225,386	$ 211,981
Tier 1 capital (to risk-weighted assets), actual amount	204,461	192,477
Common equity Tier 1 capital (to risk-weighted assets), actual amount	204,461	192,477
Tier 1 capital (to average assets), actual amount	$ 204,461	$ 192,477
Total capital (to risk-weighted assets), actual ratio	0.1320	0.1294
Tier 1 capital (to risk-weighted assets), actual ratio	0.1198	0.1175
Common equity Tier 1 capital (to risk-weighted assets), actual ratio	0.1198	0.1175
Tier 1 capital (to average assets), actual ratio	0.0955	0.0929
Total capital (to risk-weighted assets), amount, required for capital adequacy purposes	$ 136,568	$ 131,020
Tier 1 capital (to risk-weighted assets), amount, required for capital adequacy purposes	102,426	98,265
Common equity Tier 1 capital (to risk-weighted assets), amount, required for capital adequacy purposes	76,820	73,699
Tier 1 capital (to average assets), amount, required for capital adequacy purposes	$ 85,675	$ 82,836
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"	$ 170,711	$ 163,775
Tier 1 capital (to risk-weighted assets), amount, minimum to be considered "Well Capitalized"	136,568	131,020
Common equity Tier 1 capital (to risk-weighted assets), amount, minimum to be considered "Well Capitalized"	110,962	106,454
Tier 1 capital (to average assets), amount, minimum to be considered "Well Capitalized"	$ 107,093	$ 103,545
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