Regulatory Matters - Summary of Actual Capital Amounts and Ratios of Company and Bank (Detail) $ in Thousands	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital to risk-weighted assets, Actual Amount	$ 120,184	$ 109,778
Tier 1 capital to risk-weighted assets, Actual Amount	112,841	102,940
Common equity tier 1 capital to risk-weighted assets, Actual Amount	112,841	102,940
Tier 1 leverage ratio, Actual Amount	$ 112,841	$ 102,940
Total capital to risk-weighted assets, Actual Ratio	0.162	0.159
Tier 1 capital to risk-weighted assets, Actual Ratio	0.152	0.149
Common equity tier 1 capital to risk-weighted assets, Actual Ratio	0.152	0.149
Tier 1 leverage ratio, Actual Ratio	0.095	0.087
Total capital to risk-weighted assets, Minimum Required for Capital Adequacy Purposes Amount	$ 59,446	$ 55,315
Tier 1 capital to risk-weighted assets, Minimum Required for Capital Adequacy Purposes Amount	44,585	41,486
Common equity tier I capital to risk-weighted assets, Minimum Required for Capital Adequacy Purposes Amount	33,439	31,115
Tier 1 leverage ratio, Minimum Required for Capital Adequacy Purposes Amount	$ 47,324	$ 47,358
Total capital to risk-weighted assets, Minimum Required for Capital Adequacy Purposes Ratio	0.08	0.08
Tier 1 capital to risk-weighted assets, Minimum Required for Capital Adequacy Purposes Ratio	0.06	0.06
Common equity tier I capital to risk-weighted assets, Minimum Required for Capital Adequacy Purposes Ratio	0.045	0.045
Tier 1 leverage ratio, Minimum Required for Capital Adequacy Purposes Ratio	0.04	0.04
Total capital to risk-weighted assets, Minimum Required to be Well Capitalized Under Prompt Corrective Action Amount	$ 74,308	$ 69,144
Tier 1 capital to risk-weighted assets, Minimum Required to be Well Capitalized Under Prompt Corrective Action Amount	59,446	55,315
Common equity tier I capital to risk-weighted assets, Minimum Required to be Well Capitalized Under Prompt Corrective Action Amount	48,300	44,943
Tier 1 leverage ratio, Minimum Required to be Well Capitalized Under Prompt Corrective Action Amount	$ 59,155	$ 59,197
Total capital to risk-weighted assets, Minimum Required to be Well Capitalized Under Prompt Corrective Action Ratio	0.10	0.10
Tier 1 capital to risk-weighted assets, Minimum Required to be Well Capitalized Under Prompt Corrective Action Ratio	0.08	0.08
Common equity tier I capital to risk-weighted assets, Minimum Required to be Well Capitalized Under Prompt Corrective Action Ratio	0.065	0.065
Tier 1 leverage ratio, Minimum Required to be Well Capitalized Under Prompt Corrective Action Ratio	0.05	0.05
Consolidated [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital to risk-weighted assets, Actual Amount	$ 120,824	$ 110,949
Tier 1 capital to risk-weighted assets, Actual Amount	113,481	104,111
Common equity tier 1 capital to risk-weighted assets, Actual Amount	113,481	104,111
Tier 1 leverage ratio, Actual Amount	$ 113,481	$ 104,111
Total capital to risk-weighted assets, Actual Ratio	0.163	0.16
Tier 1 capital to risk-weighted assets, Actual Ratio	0.153	0.151
Common equity tier 1 capital to risk-weighted assets, Actual Ratio	0.153	0.151
Tier 1 leverage ratio, Actual Ratio	0.096	0.088
Total capital to risk-weighted assets, Minimum Required for Capital Adequacy Purposes Amount	$ 59,480	$ 55,339
Tier 1 capital to risk-weighted assets, Minimum Required for Capital Adequacy Purposes Amount	44,610	41,505
Common equity tier I capital to risk-weighted assets, Minimum Required for Capital Adequacy Purposes Amount	33,457	31,128
Tier 1 leverage ratio, Minimum Required for Capital Adequacy Purposes Amount	$ 47,340	$ 47,370
Total capital to risk-weighted assets, Minimum Required for Capital Adequacy Purposes Ratio	0.08	0.08
Tier 1 capital to risk-weighted assets, Minimum Required for Capital Adequacy Purposes Ratio	0.06	0.06
Common equity tier I capital to risk-weighted assets, Minimum Required for Capital Adequacy Purposes Ratio	0.045	0.045
Tier 1 leverage ratio, Minimum Required for Capital Adequacy Purposes Ratio	0.04	0.04
Total capital to risk-weighted assets, Minimum Required to be Well Capitalized Under Prompt Corrective Action Amount	$ 74,349	$ 69,174
Tier 1 capital to risk-weighted assets, Minimum Required to be Well Capitalized Under Prompt Corrective Action Amount	59,480	55,339
Common equity tier I capital to risk-weighted assets, Minimum Required to be Well Capitalized Under Prompt Corrective Action Amount	48,327	44,963
Tier 1 leverage ratio, Minimum Required to be Well Capitalized Under Prompt Corrective Action Amount	$ 59,175	$ 59,213
Total capital to risk-weighted assets, Minimum Required to be Well Capitalized Under Prompt Corrective Action Ratio	0.10	0.10
Tier 1 capital to risk-weighted assets, Minimum Required to be Well Capitalized Under Prompt Corrective Action Ratio	0.08	0.08
Common equity tier I capital to risk-weighted assets, Minimum Required to be Well Capitalized Under Prompt Corrective Action Ratio	0.065	0.065
Tier 1 leverage ratio, Minimum Required to be Well Capitalized Under Prompt Corrective Action Ratio	0.05	0.05