Securities Available-for-Sale - Schedule of amortized cost and fair value of securities available-for-sale (Detail) - USD ($) $ in Thousands	Dec. 31, 2021		Dec. 31, 2020
Amortized Cost	$ 90,577		$ 53,439
Gross Unrealized Gains	1,556		2,075
Gross Unrealized Losses	(768)		(44)
Fair Value	91,365		55,470
U.S. Government-sponsored enterprises obligations [Member]
Amortized Cost	6,098		997
Gross Unrealized Losses	(127)		(24)
Fair Value	5,971		973
U.S. Government agency small business administration pools guaranteed by SBA [Member]
Amortized Cost	5,059		2,399
Gross Unrealized Gains	22		71
Gross Unrealized Losses	(36)
Fair Value	5,045		2,470
Collateralized mortgage obligations issued by the FHLMC, FNMA and GNMA [Member]
Amortized Cost	3,400	[1]	938
Gross Unrealized Gains	1		11
Gross Unrealized Losses	(69)
Fair Value	3,332	[1]	949
Residential mortgage backed securities [Member]
Amortized Cost	23,784	[1]	5,100
Gross Unrealized Gains	32		49
Gross Unrealized Losses	(484)		(13)
Fair Value	23,332	[1]	5,136
Municipal bonds [Member]
Amortized Cost	49,164		44,005
Gross Unrealized Gains	1,501		1,944
Gross Unrealized Losses	(52)		(7)
Fair Value	50,613		$ 45,942
Corporate subordinated debt [Member]
Amortized Cost	3,072
Fair Value	$ 3,072

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