Loans and Allowance for Credit Losses on Loans, Loan Segments and Classes Prior to Adoption of ASU 2016-13 (CECL) (Details) - USD ($) $ in Thousands		Jun. 30, 2024		Jun. 30, 2023		Jun. 30, 2022
Major Loan Segments and Classes [Abstract]
Total gross loans	[1]			$ 1,408,791
Allowance for loan losses		$ (19,244)	[2]	(21,212)	[2]	$ (22,761)
Deferred fees and cost, net				75
Net loans receivable		1,480,229		1,387,654
Accrued interest receivable		$ 6,200		$ 5,500
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]		Accrued interest receivable		Accrued interest receivable
Residential Portfolio [Member] | Residential Real Estate [Member]
Major Loan Segments and Classes [Abstract]
Total gross loans				$ 372,443
Allowance for loan losses		$ (4,237)		(2,794)
Residential Portfolio [Member] | Construction and Land [Member]
Major Loan Segments and Classes [Abstract]
Total gross loans				19,072
Allowance for loan losses				(181)		(141)
Residential Portfolio [Member] | Multi-family [Member]
Major Loan Segments and Classes [Abstract]
Total gross loans				66,496
Residential Portfolio [Member] | Real Estate [Member]
Major Loan Segments and Classes [Abstract]
Allowance for loan losses				(2,613)		(2,373)
Commercial Real Estate Portfolio [Member] | Multi-family [Member]
Major Loan Segments and Classes [Abstract]
Allowance for loan losses				(197)		(119)
Commercial Real Estate Portfolio [Member] | Real Estate [Member]
Major Loan Segments and Classes [Abstract]
Total gross loans				693,436
Allowance for loan losses		(12,218)		(14,839)
Commercial Real Estate Portfolio [Member] | Construction [Member]
Major Loan Segments and Classes [Abstract]
Total gross loans				121,958
Allowance for loan losses				(1,622)		(1,114)
Consumer Portfolio [Member] | Home Equity [Member]
Major Loan Segments and Classes [Abstract]
Total gross loans				22,752
Allowance for loan losses		(212)		(46)		(89)
Consumer Portfolio [Member] | Consumer Installment [Member]
Major Loan Segments and Classes [Abstract]
Total gross loans				4,612
Allowance for loan losses		(500)		(332)		(349)
Commercial Portfolio [Member]
Major Loan Segments and Classes [Abstract]
Total gross loans				108,022
Allowance for loan losses		$ (2,077)		$ (3,201)		$ (2,355)

[1] Loan balances exclude accrued interest receivable of $5.5 million at June 30, 2023, which is included in accrued interest receivable in the consolidated statement of financial condition.

[2] Effective July 1, 2023, the allowance calculation is based upon the CECL methodology.  Prior to July 1, 2023, the allowance calculation was based upon the incurred loss methodology.