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Securities - Amortized Cost and Approximate Fair Value of Securities, Together with Gross Unrealized Gains and Losses of Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 228,647	$ 231,672
Gross Unrealized Gains	0	22
Gross Unrealized Losses	(37,535)	(30,395)
Fair Value	191,112	201,299
U.S. Treasury [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	497	497
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(67)	(59)
Fair Value	430	438
U.S. Government and Federal Agency [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	6,977	6,976
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(550)	(499)
Fair Value	6,427	6,477
Mortgage-backed: GSE residential [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	200,573	203,139
Gross Unrealized Gains	0	21
Gross Unrealized Losses	(33,995)	(27,434)
Fair Value	166,578	175,726
Small Business Administration [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	17,174	17,629
Gross Unrealized Gains	0	1
Gross Unrealized Losses	(2,906)	(2,397)
Fair Value	14,268	15,233
State and political subdivisions [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,426	3,431
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(17)	(6)
Fair Value	$ 3,409	$ 3,425

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- Definition

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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