Securities Available-for-Sale - Schedule of amortized cost and fair value of securities available-for-sale (Detail) - USD ($) $ in Thousands	Mar. 31, 2022		Dec. 31, 2021
Amortized Cost	$ 104,641		$ 90,577
Gross Unrealized Gains	180		1,556
Gross Unrealized Losses	(6,331)		(768)
Fair Value	98,490		91,365
U.S. Government-sponsored enterprises obligations [Member]
Amortized Cost	6,573		6,098
Gross Unrealized Losses	(486)		(127)
Fair Value	6,087		5,971
U.S. Government agency small business administration pools guaranteed by SBA [Member]
Amortized Cost	7,593	[1]	5,059
Gross Unrealized Gains			22
Gross Unrealized Losses	(321)		(36)
Fair Value	7,272	[1]	5,045
Collateralized mortgage obligations issued by the FHLMC, FNMA and GNMA [Member]
Amortized Cost	4,227	[1]	3,400
Gross Unrealized Gains			1
Gross Unrealized Losses	(280)		(69)
Fair Value	3,947	[1]	3,332
Residential mortgage backed securities [Member]
Amortized Cost	25,779		23,784
Gross Unrealized Gains			32
Gross Unrealized Losses	(2,159)		(484)
Fair Value	23,620		23,332
Municipal bonds [Member]
Amortized Cost	56,403		49,164
Gross Unrealized Gains	180		1,501
Gross Unrealized Losses	(2,941)		(52)
Fair Value	53,642		50,613
Corporate subordinated debt [Member]
Amortized Cost	4,066		3,072
Gross Unrealized Losses	(144)
Fair Value	$ 3,922		$ 3,072

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