Investment Securities - Summary Of The Amortized Cost And Estimated Fair Value Of Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized cost	$ 32,229	$ 45,798
Gross Unrealized / Unrecognized Gains	22	25
Gross Unrealized / Unrecognized Losses	(1,173)	(1,263)
Estimated fair value	31,078	44,560
Amortized cost	95,840	100,841
Gross Unrealized / Unrecognized Gains	76	0
Gross Unrealized / Unrecognized Losses	(11,203)	(10,811)
Estimated fair value	84,713	90,030
Mortgage backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized cost	12,288	15,882
Gross Unrealized / Unrecognized Gains	22	25
Gross Unrealized / Unrecognized Losses	(787)	(758)
Estimated fair value	11,523	15,149
Amortized cost	51,997	56,928
Gross Unrealized / Unrecognized Gains	76	0
Gross Unrealized / Unrecognized Losses	(6,718)	(6,140)
Estimated fair value	45,355	50,788
Corporate bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized cost	40,773	40,841
Gross Unrealized / Unrecognized Gains	0	0
Gross Unrealized / Unrecognized Losses	(3,978)	(4,158)
Estimated fair value	36,795	36,683
Government agencies [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized cost	19,941	29,916
Gross Unrealized / Unrecognized Gains	0	0
Gross Unrealized / Unrecognized Losses	(386)	(505)
Estimated fair value	19,555	29,411
Amortized cost	3,070	3,072
Gross Unrealized / Unrecognized Gains	0	0
Gross Unrealized / Unrecognized Losses	(507)	(513)
Estimated fair value	$ 2,563	$ 2,559