Loans - Analysis Of Past Due Loans By Portfolio Segment (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Total	$ 374,991	$ 367,437
Non-Accrual Loans	837	884
30-59 Days Past Due [Member]
Total Past Due	123	185
60-89 Days Past Due [Member]
Total Past Due	616
Greater than 90 Days [Member]
Total Past Due	235	884
Financial Asset, Past Due
Total Past Due	974	1,069
Financial Asset, Not Past Due
Total Past Due	374,017	366,368
CRE [Member]
Total	72,057	66,166
CRE [Member] | Financial Asset, Not Past Due
Total Past Due	72,057	66,166
MF [Member]
Total	8,998	6,619
MF [Member] | Financial Asset, Not Past Due
Total Past Due	8,998	6,619
C+I [Member]
Total	26,851	45,262
Non-Accrual Loans		822
C+I [Member] | Greater than 90 Days [Member]
Total Past Due		822
C+I [Member] | Financial Asset, Past Due
Total Past Due		822
C+I [Member] | Financial Asset, Not Past Due
Total Past Due	26,851	44,440
ADL [Member]
Total	21,365	23,145
ADL [Member] | Financial Asset, Not Past Due
Total Past Due	21,365	23,145
RES [Member]
Total	234,199	213,718
Non-Accrual Loans	722	62
RES [Member] | 30-59 Days Past Due [Member]
Total Past Due		42
RES [Member] | 60-89 Days Past Due [Member]
Total Past Due	487
RES [Member] | Greater than 90 Days [Member]
Total Past Due	235	62
RES [Member] | Financial Asset, Past Due
Total Past Due	722	104
RES [Member] | Financial Asset, Not Past Due
Total Past Due	233,477	213,614
HELOC [Member]
Total	6,947	9,583
Non-Accrual Loans	115
HELOC [Member] | 30-59 Days Past Due [Member]
Total Past Due	117	143
HELOC [Member] | 60-89 Days Past Due [Member]
Total Past Due	129
HELOC [Member] | Financial Asset, Past Due
Total Past Due	246	143
HELOC [Member] | Financial Asset, Not Past Due
Total Past Due	6,701	9,440
CON [Member]
Total	4,574	2,944
CON [Member] | 30-59 Days Past Due [Member]
Total Past Due	6
CON [Member] | Financial Asset, Past Due
Total Past Due	6
CON [Member] | Financial Asset, Not Past Due
Total Past Due	$ 4,568	$ 2,944