Consolidated Statements Of Changes In Shareholders' Equity - USD ($) $ in Thousands	Total Par Value Of Common Shares [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Total
Balance, beginning at Jun. 30, 2020	$ 8,008	$ 31,748	$ (1,563)	$ 137,312	$ 175,505
Long-term incentive compensation		2,321			2,321
Stock-based compensation	112	(24)			88
Stock options exercised, net	13	(30)			(17)
Treasury stock purchases			(29,757)		(29,757)
Cash dividends declared				(3,220)	(3,220)
Net income				23,048	23,048
Balance, ending at Jun. 30, 2021	8,133	34,015	(31,320)	157,140	167,968
Long-term incentive compensation		51			51
Stock-based compensation	50	291			341
Stock options exercised, net	7	110			117
Treasury stock purchases			(35,052)		(35,052)
Cash dividends declared				(3,718)	(3,718)
Net income				1,853	1,853
Balance, ending at Jun. 30, 2022	8,190	34,467	(66,372)	155,275	131,560
Long-term incentive compensation		1,813			1,813
Stock-based compensation	102	325			427
Treasury stock purchases			(3,700)		(3,700)
Cash dividends declared				(3,257)	(3,257)
Net income				14,778	14,778
Balance, ending at Jun. 30, 2023	$ 8,292	$ 36,605	$ (70,072)	$ 166,796	$ 141,621