Loans - Internal Risk Rating Of Loans By Portfolio Segment (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Total Loans	$ 381,521	$ 343,799
Pass [Member]
Total Loans	378,293	341,156
Special Mention [Member]
Total Loans	1,916	2,166
Substandard [Member]
Total Loans	1,312	477
CRE [Member]
Total Loans	69,068	70,194
CRE [Member] | Pass [Member]
Total Loans	68,724	70,085
CRE [Member] | Special Mention [Member]
Total Loans	115
CRE [Member] | Substandard [Member]
Total Loans	229	109
MF [Member]
Total Loans	6,425	4,888
MF [Member] | Pass [Member]
Total Loans	6,425	4,888
C+I [Member]
Total Loans	53,696	24,676
C+I [Member] | Pass [Member]
Total Loans	50,877	22,208
C+I [Member] | Special Mention [Member]
Total Loans	1,801	2,166
C+I [Member] | Substandard [Member]
Total Loans	1,018	302
ADL [Member]
Total Loans	23,637	18,844
ADL [Member] | Pass [Member]
Total Loans	23,637	18,844
RES [Member]
Total Loans	217,376	213,322
RES [Member] | Pass [Member]
Total Loans	217,311	213,256
RES [Member] | Substandard [Member]
Total Loans	65	66
HELOC [Member]
Total Loans	9,359	10,123
HELOC [Member] | Pass [Member]
Total Loans	9,359	10,123
CON [Member]
Total Loans	1,960	1,752
CON [Member] | Pass [Member]
Total Loans	$ 1,960	$ 1,752