CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in capital	Treasury Stock	Unearned Common Stock held by ESOP	Retained Earnings	Accumulated Other Comprehensive Income	Total
Beginning balance at Jun. 30, 2020	$ 467	$ 42,932	$ (3,710)		$ 56,600	$ 76	$ 96,365
Beginning balance (in shares) at Jun. 30, 2020	14,628,530
Increase (Decrease) in Stockholders' Equity
Net income					670		670
Regular cash dividend paid					(1,886)		(1,886)
Other comprehensive income (loss)						357	357
Ending balance at Sep. 30, 2020	$ 467	42,932	(3,710)		55,384	433	95,506
Ending balance (in shares) at Sep. 30, 2020	14,628,530
Beginning balance at Jun. 30, 2020	$ 467	42,932	(3,710)		56,600	76	96,365
Beginning balance (in shares) at Jun. 30, 2020	14,628,530
Increase (Decrease) in Stockholders' Equity
Net income							3,113
Other comprehensive income (loss)							(1,260)
Ending balance at Mar. 31, 2021	$ 152	168,349		$ (10,104)	57,827	(1,184)	215,040
Ending balance (in shares) at Mar. 31, 2021	15,170,566
Beginning balance at Sep. 30, 2020	$ 467	42,932	(3,710)		55,384	433	95,506
Beginning balance (in shares) at Sep. 30, 2020	14,628,530
Increase (Decrease) in Stockholders' Equity
Net income					1,376		1,376
Other comprehensive income (loss)						307	307
Ending balance at Dec. 31, 2020	$ 467	42,932	(3,710)		56,760	740	97,189
Ending balance (in shares) at Dec. 31, 2020	14,628,530
Increase (Decrease) in Stockholders' Equity
Net income					1,067		1,067
Other comprehensive income (loss)						(1,924)	(1,924)
ESOP shares committed to be released				8			8
Purchase of treasury stock			(49)				(49)
Purchase of treasury stock (in shares)	(5,156)
William Penn, MHC shares sold in public offering, net of offering costs	$ (315)	129,176					128,861
William Penn, MHC shares sold in public offering, net of offering costs (in shares)	12,640,035
Retirement of MHC shares (in shares)	(12,092,669)
Fractional shares and other adjustments resulting from conversion of existing shares at 3.2585 exchange ratio (in shares)	(174)
Treasury stock retired		(3,759)	$ 3,759
Purchase of unearned common stock held by employee stock ownership plan				(10,112)			(10,112)
Ending balance at Mar. 31, 2021	$ 152	168,349		(10,104)	57,827	(1,184)	215,040
Ending balance (in shares) at Mar. 31, 2021	15,170,566
Beginning balance at Jun. 30, 2021	$ 152	168,349		(10,004)	58,493	(64)	$ 216,926
Beginning balance (in shares) at Jun. 30, 2021	15,170,566						15,170,566
Increase (Decrease) in Stockholders' Equity
Net income					1,160		$ 1,160
Other comprehensive income (loss)						(598)	(598)
ESOP shares committed to be released		5		103			108
Special cash dividend paid					(4,551)		(4,551)
Ending balance at Sep. 30, 2021	$ 152	168,354		(9,901)	55,102	(662)	213,045
Ending balance (in shares) at Sep. 30, 2021	15,170,566
Beginning balance at Jun. 30, 2021	$ 152	168,349		(10,004)	58,493	(64)	$ 216,926
Beginning balance (in shares) at Jun. 30, 2021	15,170,566						15,170,566
Increase (Decrease) in Stockholders' Equity
Net income							$ 3,159
Other comprehensive income (loss)							(9,121)
Ending balance at Mar. 31, 2022	$ 151	168,078		(9,700)	56,936	(9,185)	$ 206,280
Ending balance (in shares) at Mar. 31, 2022	15,147,766						15,147,766
Beginning balance at Sep. 30, 2021	$ 152	168,354		(9,901)	55,102	(662)	$ 213,045
Beginning balance (in shares) at Sep. 30, 2021	15,170,566
Increase (Decrease) in Stockholders' Equity
Net income					1,175		1,175
Other comprehensive income (loss)						(447)	(447)
ESOP shares committed to be released		6		101			107
Ending balance at Dec. 31, 2021	$ 152	168,360		(9,800)	56,277	(1,109)	213,880
Ending balance (in shares) at Dec. 31, 2021	15,170,566
Increase (Decrease) in Stockholders' Equity
Net income					824		824
Regular cash dividend paid					(165)		(165)
Other comprehensive income (loss)						(8,076)	(8,076)
ESOP shares committed to be released		10		100			110
Retirement of MHC shares	$ (1)	(292)					(293)
Retirement of MHC shares (in shares)	(22,800)
Ending balance at Mar. 31, 2022	$ 151	$ 168,078		$ (9,700)	$ 56,936	$ (9,185)	$ 206,280
Ending balance (in shares) at Mar. 31, 2022	15,147,766						15,147,766