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)															13,866,999	2,068,549			978,049
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
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 income (loss)															0	0	0		0	(486)	0	(486)
Net income (loss)															0	0	0		0	0	53	53
Share-based compensation, adjustment for forfeitures, net of tax															0	0	(1)		0	0	0	(1)
Balance at Sep. 30, 2022															$ 347	$ 52	16,440		$ (2,722)	3,138	35,641	52,896
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)																		127,372
Net other comprehensive income (loss)																						(1,734)
Net income (loss)																						900
Balance at Dec. 31, 2022															$ 347	$ 52	16,441		$ (2,958)	1,890	36,153	51,925
Balance (in shares)															13,866,999	2,068,549			1,014,031
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
Repurchases of shares of Common Stock (class A), including excise tax (in shares)															0	0		87,407	87,407
Repurchases of shares of Common Stock (class A), including excise tax															$ 0	$ 0	0		$ (249)	0	0	(249)
Issuance of stock under ESPP of shares of Common Stock (class A) (in shares)															0	0			(4,898)
Issuance of stock under ESPP of shares of Common Stock (class A)															$ 0	$ 0	1		$ 13	0	0	14
Dividends declared															0	0	0		0	0	(335)	(335)
Net other comprehensive income (loss)															0	0	0		0	(1,248)	0	(1,248)
Net income (loss)															0	0	0		0	0	847	847
Balance at Dec. 31, 2022															$ 347	$ 52	16,441		$ (2,958)	1,890	36,153	51,925
Balance (in shares)															13,866,999	2,068,549			1,096,540
Balance (in shares) | Accounting Standards Update 2016-13 [Member]	0	0		0				13,866,999	2,068,549		1,370,325
Balance (in shares)															13,866,999	2,068,549			1,370,325
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
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 income (loss)															0	0	0		0	(214)	0	(214)
Net income (loss)															0	0	0		0	0	(176)	(176)
Balance at Sep. 30, 2023															$ 347	$ 52	16,444		$ (4,342)	1,134	37,066	50,701
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)																		394,508
Net other comprehensive income (loss)																						(385)
Net income (loss)																						1,053
Balance at Dec. 31, 2023															$ 347	$ 52	16,444		$ (4,891)	963	37,975	50,890
Balance (in shares)															13,866,999	2,068,549			1,563,044
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
Repurchases of shares of Common Stock (class A), including excise tax (in shares)															0	0		196,295	196,295
Repurchases of shares of Common Stock (class A), including excise tax															$ 0	$ 0	0		$ (566)	0	0	(566)
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)
Net other comprehensive income (loss)															0	0	0		0	(171)	0	(171)
Net income (loss)															0	0	0		0	0	1,229	1,229
Balance at Dec. 31, 2023															$ 347	$ 52	$ 16,444		$ (4,891)	$ 963	$ 37,975	$ 50,890
Balance (in shares)															13,866,999	2,068,549			1,753,239