Securities Available-for-Sale - Schedule of amortized cost and fair value of securities available-for-sale (Detail) - USD ($) $ in Thousands	Sep. 30, 2024		Dec. 31, 2023
Amortized Cost	$ 139,660		$ 129,988
Gross Unrealized Gains	2,062		1,779
Gross Unrealized Losses	(8,718)		(9,913)
Fair Value	133,004		121,854
U.S. Government-sponsored enterprises ("GSE") obligations [Member]
Amortized Cost	1,648		1,668
Gross Unrealized Losses	(216)		(270)
Fair Value	1,432		1,398
U.S. Government agency small business administration pools guaranteed by SBA [Member]
Amortized Cost	14,537	[1]	16,410
Gross Unrealized Gains	33		36
Gross Unrealized Losses	(708)		(863)
Fair Value	13,862	[1]	15,583
Collateralized mortgage obligations issued by the FHLMC, FNMA and GNMA [Member]
Amortized Cost	15,594	[1]	2,958
Gross Unrealized Gains	110
Gross Unrealized Losses	(441)		(484)
Fair Value	15,263	[1]	2,474
Residential mortgage backed GSE securities [Member]
Amortized Cost	42,166	[1]	41,186
Gross Unrealized Gains	857		653
Gross Unrealized Losses	(3,249)		(3,618)
Fair Value	39,774	[1]	38,221
Municipal bonds [Member]
Amortized Cost	56,894		57,192
Gross Unrealized Gains	957		1,087
Gross Unrealized Losses	(3,274)		(3,587)
Fair Value	54,577		54,692
Corporate debt [Member]
Amortized Cost	500		500
Gross Unrealized Losses	(13)		(8)
Fair Value	487		492
Corporate subordinated debt [Member]
Amortized Cost	8,321		10,074
Gross Unrealized Gains	105		3
Gross Unrealized Losses	(817)		(1,083)
Fair Value	$ 7,609		$ 8,994

[1] Actual maturities for these debt securities are dependent upon the interest rate environment and prepayments on the underlying loans.