Securities Available-for-Sale - Summary of gross unrealized losses and fair value for those investments with unrealized losses (Detail) $ in Thousands	Dec. 31, 2021 USD ($) Number	Dec. 31, 2020 USD ($) Number
Less than 12 Months, Number of Securities \| Number	43	7
Less than 12 Months, Fair Value	$ 36,824	$ 6,456
Less than 12 Months, Unrealized Losses	$ (633)	(44)
More than 12 Months, Number of Securities \| Number	4
More than 12 Months, Fair Value	$ 3,837
More than 12 Months, Unrealized Losses	(135)
Total, Fair Value	40,661	6,456
Total, Unrealized Losses	$ (768)	$ (44)
U.S. Government-sponsored enterprises obligations [Member]
Less than 12 Months, Number of Securities \| Number	7	2
Less than 12 Months, Fair Value	$ 5,022	$ 973
Less than 12 Months, Unrealized Losses	$ (80)	(24)
More than 12 Months, Number of Securities \| Number	2
More than 12 Months, Fair Value	$ 949
More than 12 Months, Unrealized Losses	(47)
Total, Fair Value	5,971	973
Total, Unrealized Losses	$ (127)	$ (24)
U.S. Government agency small business administration pools guaranteed by SBA [Member]
Less than 12 Months, Number of Securities \| Number	3
Less than 12 Months, Fair Value	$ 2,988
Less than 12 Months, Unrealized Losses	(36)
Total, Fair Value	2,988
Total, Unrealized Losses	$ (36)
Collateralized mortgage obligations issued by the FHLMC, FNMA and GNMA [Member]
Less than 12 Months, Number of Securities \| Number	4
Less than 12 Months, Fair Value	$ 2,779
Less than 12 Months, Unrealized Losses	(69)
Total, Fair Value	2,779
Total, Unrealized Losses	$ (69)
Residential mortgage backed securities [Member]
Less than 12 Months, Number of Securities \| Number	22	1
Less than 12 Months, Fair Value	$ 19,541	$ 3,102
Less than 12 Months, Unrealized Losses	$ (399)	(13)
More than 12 Months, Number of Securities \| Number	1
More than 12 Months, Fair Value	$ 2,304
More than 12 Months, Unrealized Losses	(85)
Total, Fair Value	21,845	3,102
Total, Unrealized Losses	$ (484)	$ (13)
Municipal bonds [Member]
Less than 12 Months, Number of Securities \| Number	7	4
Less than 12 Months, Fair Value	$ 6,494	$ 2,381
Less than 12 Months, Unrealized Losses	$ (49)	(7)
More than 12 Months, Number of Securities \| Number	1
More than 12 Months, Fair Value	$ 584
More than 12 Months, Unrealized Losses	(3)
Total, Fair Value	7,078	2,381
Total, Unrealized Losses	$ (52)	$ (7)

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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