Loans - Transactions In The Allowance For Loan Losses ("ALL") (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Balance	$ 3,590	$ 3,342
Provision for loan losses		205
Charge-offs	(14)
Recoveries	5	43
Balance	3,581	3,590
CRE [Member]
Balance	833	753
Provision for loan losses	109	80
Balance	942	833
MF [Member]
Balance	80	60
Provision for loan losses	(26)	20
Balance	54	80
C+I [Member]
Balance	194	267
Provision for loan losses	(14)	(112)
Recoveries	4	39
Balance	184	194
ADL [Member]
Balance	178	174
Provision for loan losses	(40)	4
Balance	138	178
RES [Member]
Balance	2,139	1,656
Provision for loan losses	(91)	482
Recoveries		1
Balance	2,048	2,139
HELOC [Member]
Balance	63	78
Provision for loan losses	18	(15)
Balance	81	63
CON [Member]
Balance	75	52
Provision for loan losses	38	20
Charge-offs	(14)
Recoveries	1	3
Balance	100	75
Unallocated [Member]
Balance	28	302
Provision for loan losses	6	(274)
Balance	$ 34	$ 28