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
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) (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 (in shares)																		394,508
Other Comprehensive Income (Loss), Net of Tax																						(385)
Net income (loss)																						1,053
Balance (in shares) at Dec. 31, 2023															13,866,999	2,068,549			1,753,239
Balance at Dec. 31, 2023															$ 347	$ 52	16,444		$ (4,891)	963	37,800	50,715
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
Repurchases of shares of Common Stock (class A), including excise tax															$ 0	$ 0	0		$ (566)	0	0	(566)
Repurchases of shares of Common Stock (class A), including excise tax (in shares)																		196,295	196,295
Issuance of stock under ESPP of shares of Common Stock (class A) (in shares)															0	0			(6,100)
Issuance of stock under ESPP of shares of Common Stock (class A)															$ 0	$ 0	0		$ 17	0	0	17
Dividends declared															0	0	0		0	0	(320)	(320)
Other Comprehensive Income (Loss), Net of Tax															0	0	0		0	(171)	0	(171)
Net income (loss)															$ 0	$ 0	0		$ 0	0	1,229	1,229
Balance (in shares) at Dec. 31, 2023															13,866,999	2,068,549			1,753,239
Balance at Dec. 31, 2023															$ 347	$ 52	16,444		$ (4,891)	963	37,800	50,715
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
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
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 (in shares)																		434,618
Other Comprehensive Income (Loss), Net of Tax																						(276)
Net income (loss)																						229
Balance (in shares) at Dec. 31, 2024															13,866,999	2,068,549			2,533,675
Balance at Dec. 31, 2024															$ 347	$ 52	16,449		$ (6,957)	308	37,086	47,285
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
Repurchases of shares of Common Stock (class A), including excise tax															$ 0	$ 0	0		$ (592)	0	0	(592)
Repurchases of shares of Common Stock (class A), including excise tax (in shares)																		236,731	236,731
Issuance of stock under ESPP of shares of Common Stock (class A) (in shares)															0	0			(7,794)
Issuance of stock under ESPP of shares of Common Stock (class A)															$ 0	$ 0	(3)		$ 22	0	0	19
Dividends declared															0	0	0		0	0	(299)	(299)
Other Comprehensive Income (Loss), Net of Tax															0	0	0		0	(134)	0	(134)
Net income (loss)															0	0	0		0	0	(86)	(86)
Share-based compensation, net of tax															0	0	11		0	0	0	11
Share-based compensation, adjustment for forfeitures, net of tax															$ 0	$ 0	(1)		$ 0	0	0	(1)
Balance (in shares) at Dec. 31, 2024															13,866,999	2,068,549			2,533,675
Balance at Dec. 31, 2024															$ 347	$ 52	$ 16,449		$ (6,957)	$ 308	$ 37,086	$ 47,285