Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Cumulative Effect, Period of Adoption, Adjustment [Member] Common Stock [Member] Common Class A [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Common Stock [Member] Common Class C [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Treasury Stock, Common [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Common Stock [Member] Common Class A [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Common Stock [Member] Common Class C [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Treasury Stock, Common [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Common Stock [Member] Common Class A [Member]	Common Stock [Member] Common Class C [Member]	Additional Paid-in Capital [Member]	Treasury Stock, Common [Member] Common Class A [Member]	Treasury Stock, Common [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance (in shares) (Accounting Standards Update 2016-13 [Member]) at Jun. 30, 2023								13,866,999	2,068,549		1,370,325
Balance (in shares) at Jun. 30, 2023															13,866,999	2,068,549			1,370,325
Balance (Accounting Standards Update 2016-13 [Member]) at Jun. 30, 2023	$ 0	$ 0	$ 0	$ 0	$ 0	$ (183)	$ (183)	$ 347	$ 52	$ 16,442	$ (3,740)	$ 1,348	$ 37,389	$ 51,838
Balance at Jun. 30, 2023															$ 347	$ 52	$ 16,442		$ (3,740)	$ 1,348	$ 37,572	$ 52,021
Repurchases of shares of Common Stock (class A), including excise tax															$ 0	$ 0	0		$ (617)	0	0	(617)
Repurchases of shares of Common Stock (class A), including excise tax (in shares)																		198,213	198,213
Issuance of stock under ESPP of shares of Common Stock (class A) (in shares)															0	0			(5,494)
Issuance of stock under ESPP of shares of Common Stock (class A)															$ 0	$ 0	2		$ 15	0	0	17
Dividends declared															0	0	0		0	0	(322)	(322)
Other Comprehensive Income (Loss), Net of Tax															0	0	0		0	(214)	0	(214)
Net income (loss)															$ 0	$ 0	0		$ 0	0	(176)	(176)
Balance (in shares) at Sep. 30, 2023															13,866,999	2,068,549			1,563,044
Balance at Sep. 30, 2023															$ 347	$ 52	16,444		$ (4,342)	1,134	36,891	50,526
Balance (in shares) at Jun. 30, 2024															13,866,999	2,068,549			2,113,516
Balance at Jun. 30, 2024															$ 347	$ 52	16,443		$ (5,880)	584	37,460	49,006
Repurchases of shares of Common Stock (class A), including excise tax															$ 0	$ 0	0		$ (525)	0	0	(525)
Repurchases of shares of Common Stock (class A), including excise tax (in shares)																		197,887	197,887
Issuance of stock under ESPP of shares of Common Stock (class A) (in shares)															0	0			(6,665)
Issuance of stock under ESPP of shares of Common Stock (class A)															$ 0	$ 0	(1)		$ 18	0	0	17
Dividends declared															0	0	0		0	0	(304)	(304)
Other Comprehensive Income (Loss), Net of Tax															0	0	0		0	(142)	0	(142)
Net income (loss)															$ 0	$ 0	0		$ 0	0	315	315
Balance (in shares) at Sep. 30, 2024															13,866,999	2,068,549			2,304,738
Balance at Sep. 30, 2024															$ 347	$ 52	$ 16,442		$ (6,387)	$ 442	$ 37,471	$ 48,367