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) at Jun. 30, 2022															13,866,999	2,068,549			978,049
Balance at Jun. 30, 2022															$ 347	$ 52	$ 16,438		$ (2,599)	$ 3,624	$ 35,923	$ 53,785
Repurchases of shares of Common Stock (class A), including excise tax (in shares)															0	0		39,965	39,965
Repurchases of shares of Common Stock (class A), including excise tax															$ 0	$ 0	0		$ (133)	0	0	(133)
Issuance of stock under ESPP of shares of Common Stock (class A) (in shares)															0	0			(3,983)
Issuance of stock under ESPP of shares of Common Stock (class A)															$ 0	$ 0	3		$ 10	0	0	13
Dividends declared															0	0	0		0	0	(335)	(335)
Net other comprehensive loss															0	0	0		0	(486)	0	(486)
Net income (loss)															0	0	0		0	0	53	53
Share-based compensation, net of tax															$ 0	$ 0	(1)		$ 0	0	0	(1)
Balance (in shares) at Sep. 30, 2022															13,866,999	2,068,549			1,014,031
Balance at Sep. 30, 2022															$ 347	$ 52	16,440		$ (2,722)	3,138	35,641	52,896
Balance (in shares) (Accounting Standards Update 2016-13 [Member]) at Jun. 30, 2023	0	0		0				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	$ 37,564	$ 52,013
Balance at Jun. 30, 2023															$ 347	$ 52	16,442		$ (3,740)	1,348	37,747	52,196
Repurchases of shares of Common Stock (class A), including excise tax (in shares)															0	0		198,213	198,213
Repurchases of shares of Common Stock (class A), including excise tax															$ 0	$ 0	0		$ (617)	0	0	(617)
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)
Net other comprehensive loss															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	$ 37,066	$ 50,701