Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Unearned Compensation ESOP [Member]
Beginning Balance at Jun. 30, 2021	$ 48,645			$ 48,628	$ 17
Net income	442			442
Comprehensive income (loss)	425
Other comprehensive loss	(17)				(17)
Transfer of cash from CFSB to 15 Beach MHC	(100)			(100)
Issuance of shares to the mutual holding company (in shares)		3,586,903
Issuance of shares to the mutual holding company	36	$ 36
Issuance of shares in the intial public offering, net of expenses	26,445	$ 28	$ 26,417
Issuance of shares in the intial public offering, net of expenses (in shares)		2,804,306
Issuance and contribution of shares to the Colonial Federal Savings Bank Charitable Foundation, Inc.	1,304	$ 1	1,303
Issuance and contribution of shares to the Colonial Federal Savings Bank Charitable Foundation, Inc. (in shares)		130,433
Purchase of shares by the ESOP	(2,556)					$ (2,556)
ESOP shares committed to be released	51					51
Ending Balance (in shares) at Jun. 30, 2022		6,521,642
Ending Balance at Jun. 30, 2022	74,250	$ 65	27,720	48,970	0	(2,505)
Net income	1,446			1,446
Comprehensive income (loss)	1,443
Other comprehensive loss	(3)				(3)
Restricted stock awards granted		111,000
Stock-based compensation	109		109
ESOP shares committed to be released	87		(15)			102
Ending Balance (in shares) at Jun. 30, 2023		6,632,642
Ending Balance at Jun. 30, 2023	$ 75,889	$ 65	$ 27,814	$ 50,416	$ (3)	$ (2,403)