Loans - Analysis Of Past Due Loans By Portfolio Segment (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Total	$ 378,009	$ 374,991
Non-Accrual Loans	795	837
30-59 Days Past Due [Member]
Total Past Due	122	123
60-89 Days Past Due [Member]
Total Past Due	16	616
Greater than 90 Days [Member]
Total Past Due	602	235
Financial Asset, Past Due [Member]
Total Past Due	740	974
Financial Asset, Not Past Due [Member]
Total Past Due	377,269	374,017
CRE [Member]
Total	76,397	72,057
CRE [Member] | Financial Asset, Not Past Due [Member]
Total Past Due	76,397	72,057
MF [Member]
Total	8,900	8,998
MF [Member] | Financial Asset, Not Past Due [Member]
Total Past Due	8,900	8,998
C+I [Member]
Total	28,459	26,851
C+I [Member] | Financial Asset, Not Past Due [Member]
Total Past Due	28,459	26,851
ADL [Member]
Total	17,423	21,365
ADL [Member] | Financial Asset, Not Past Due [Member]
Total Past Due	17,423	21,365
RES [Member]
Total	235,273	234,199
Non-Accrual Loans	680	722
RES [Member] | 60-89 Days Past Due [Member]
Total Past Due		487
RES [Member] | Greater than 90 Days [Member]
Total Past Due	487	235
RES [Member] | Financial Asset, Past Due [Member]
Total Past Due	487	722
RES [Member] | Financial Asset, Not Past Due [Member]
Total Past Due	234,786	233,477
HELOC [Member]
Total	6,569	6,947
Non-Accrual Loans	115	115
HELOC [Member] | 30-59 Days Past Due [Member]
Total Past Due	122	117
HELOC [Member] | 60-89 Days Past Due [Member]
Total Past Due	16	129
HELOC [Member] | Greater than 90 Days [Member]
Total Past Due	115
HELOC [Member] | Financial Asset, Past Due [Member]
Total Past Due	253	246
HELOC [Member] | Financial Asset, Not Past Due [Member]
Total Past Due	6,316	6,701
CON [Member]
Total	4,988	4,574
CON [Member] | 30-59 Days Past Due [Member]
Total Past Due		6
CON [Member] | Financial Asset, Past Due [Member]
Total Past Due		6
CON [Member] | Financial Asset, Not Past Due [Member]
Total Past Due	$ 4,988	$ 4,568