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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	Dec. 31, 2023	Jun. 30, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 227,972	$ 231,672
Gross Unrealized Gains	77	22
Gross Unrealized Losses	(28,119)	(30,395)
Fair Value	199,930	201,299
U.S. Treasury [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	496	497
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(49)	(59)
Fair Value	447	438
U.S. Government and Federal Agency [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	6,978	6,976
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(394)	(499)
Fair Value	6,584	6,477
Mortgage-backed: GSE residential [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	198,149	203,139
Gross Unrealized Gains	76	21
Gross Unrealized Losses	(25,332)	(27,434)
Fair Value	172,893	175,726
Small Business Administration [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	16,919	17,629
Gross Unrealized Gains	0	1
Gross Unrealized Losses	(2,265)	(2,397)
Fair Value	14,654	15,233
State and political subdivisions [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,430	3,431
Gross Unrealized Gains	1	0
Gross Unrealized Losses	(79)	(6)
Fair Value	$ 5,352	$ 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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