Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member] Common Class A [Member]	Common Stock [Member] Common Class C [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member] Common Class A [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance at June 30, 2022 (in shares) at Jun. 30, 2021	13,866,913	2,068,635			898,953
Balance at Jun. 30, 2021	$ 347	$ 52	$ 15,677		$ (2,172)	$ 6,587	$ 33,833	$ 54,324
Purchases of shares of Common Stock (class A) (in shares)	0	0		13,647	13,647
Purchases of shares of Common Stock (class A)	$ 0	$ 0	0		$ (82)	0	0	(82)
Issuance of stock under ESPP of shares of Common Stock (class A) (in shares)	0	0			(2,228)
Issuance of stock under ESPP of shares of Common Stock (class A)	$ 0	$ 0	8		$ 6	0	0	14
Dividends declared	0	0	0		0	0	(338)	(338)
Other comprehensive income (loss), net of tax	0	0	0		0	(635)	0	(635)
Net Income	0	0	0		0	0	2,390	2,390
Share-based compensation, net of tax	$ 0	$ 0	388		$ 0	0	0	388
Balance at September 30, 2022 (in shares) at Sep. 30, 2021	13,866,913	2,068,635			910,372
Balance at Sep. 30, 2021	$ 347	$ 52	16,073		$ (2,248)	5,952	35,885	56,061
Balance at June 30, 2022 (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)	4,276	37,982	56,496
Purchases of shares of Common Stock (class A) (in shares)	0	0		39,965	39,965
Purchases of shares of Common Stock (class A)	$ 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
Share-based compensation, adjustment for forfeitures, net of tax	0	0	(1)		0	0	0	(1)
Dividends declared	0	0	0		0	0	(335)	(335)
Other comprehensive income (loss), net of tax	0	0	0		0	(491)	0	(491)
Net Income	$ 0	$ 0	0		$ 0	0	118	118
Balance at September 30, 2022 (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)	$ 3,785	$ 37,765	$ 55,667