Investment Securities - Summary Of The Amortized Cost And Estimated Fair Value Of Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Amortized cost	$ 60,387	$ 54,183
Gross unrealized gains	1,124	1,103
Gross unrealized losses	(369)	(193)
Estimated fair value	61,142	55,093
Corporate bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized cost	31,306	24,224
Gross unrealized gains	574	434
Gross unrealized losses	(272)	(170)
Estimated fair value	31,608	24,488
Mortgage backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized cost	26,706	27,541
Gross unrealized gains	513	669
Gross unrealized losses	(97)	(17)
Estimated fair value	27,122	28,193
Government agencies [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized cost	2,375	2,418
Gross unrealized gains	37	0
Gross unrealized losses	0	(6)
Estimated fair value	$ 2,412	$ 2,412

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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Amount, before tax, of unrealized loss 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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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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Amount of 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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