Loans - Analysis Of Past Due Loans By Portfolio Segment (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Total	$ 400,056	$ 374,991
Non-Accrual Loans	89	837
30-59 Days Past Due [Member]
Total Past Due	12	123
60-89 Days Past Due [Member]
Total Past Due	84	616
Greater than 90 Days [Member]
Total Past Due		235
Total Past Due
Total Past Due	96	974
Current
Total Past Due	399,960	374,017
CRE [Member]
Total	80,506	72,057
CRE [Member] | Current
Total Past Due	80,506	72,057
MF [Member]
Total	8,185	8,998
MF [Member] | Current
Total Past Due	8,185	8,998
C+I [Member]
Total	24,059	26,851
C+I [Member] | Current
Total Past Due	24,059	26,851
ADL [Member]
Total	18,490	21,365
ADL [Member] | Current
Total Past Due	18,490	21,365
RES [Member]
Total	251,466	234,199
Non-Accrual Loans	84	722
RES [Member] | 60-89 Days Past Due [Member]
Total Past Due	84	487
RES [Member] | Greater than 90 Days [Member]
Total Past Due		235
RES [Member] | Total Past Due
Total Past Due	84	722
RES [Member] | Current
Total Past Due	251,382	233,477
HELOC [Member]
Total	10,161	6,947
Non-Accrual Loans		115
HELOC [Member] | 30-59 Days Past Due [Member]
Total Past Due	5	117
HELOC [Member] | 60-89 Days Past Due [Member]
Total Past Due		129
HELOC [Member] | Total Past Due
Total Past Due	5	246
HELOC [Member] | Current
Total Past Due	10,156	6,701
CON [Member]
Total	7,189	4,574
Non-Accrual Loans	5
CON [Member] | 30-59 Days Past Due [Member]
Total Past Due	7	6
CON [Member] | Total Past Due
Total Past Due	7	6
CON [Member] | Current
Total Past Due	$ 7,181	$ 4,568