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Securities Available-for-Sale - Schedule of amortized cost and fair value of securities available-for-sale (Detail) - USD ($) $ in Thousands	Sep. 30, 2025		Dec. 31, 2024
Amortized Cost	$ 149,415		$ 129,814
Gross Unrealized Gains	1,901		679
Gross Unrealized Losses	(8,796)		(10,276)
Fair Value	142,520		120,217
U.S. Government-sponsored enterprises obligations [Member]
Amortized Cost	1,622		1,642
Gross Unrealized Losses	(174)		(255)
Fair Value	1,448		1,387
U.S. Government agency small business administration pools guaranteed by SBA [Member]
Amortized Cost	11,981	[1]	14,011
Gross Unrealized Gains	6		16
Gross Unrealized Losses	(765)		(902)
Fair Value	11,222	[1]	13,125
Collateralized mortgage obligations issued by the FHLMC, FNMA and GNMA [Member]
Amortized Cost	34,584	[1]	19,924
Gross Unrealized Gains	798		34
Gross Unrealized Losses	(431)		(596)
Fair Value	34,951	[1]	19,362
Residential mortgage-backed securities [Member]
Amortized Cost	60,299	[1]	52,452
Gross Unrealized Gains	917		392
Gross Unrealized Losses	(3,231)		(4,382)
Fair Value	57,985	[1]	48,462
Municipal bonds [Member]
Amortized Cost	32,655		32,960
Gross Unrealized Gains	28		74
Gross Unrealized Losses	(3,829)		(3,502)
Fair Value	28,854		29,532
Corporate debt [Member]
Amortized Cost	500		500
Gross Unrealized Losses	(12)		(16)
Fair Value	488		484
Corporate subordinated debt [Member]
Amortized Cost	7,774		8,325
Gross Unrealized Gains	152		163
Gross Unrealized Losses	(354)		(623)
Fair Value	$ 7,572		$ 7,865
[1] Actual maturities for these debt securities are dependent upon the interest rate environment and prepayments on the underlying loans.

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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