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] Cumulative Effect, Period of Adoption, Adjustment [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Total
Balance, beginning (ASU 2016-02 adoption [Member]) at Jun. 30, 2019				$ (66)			$ (66)
Balance, beginning at Jun. 30, 2019	$ 7,903	$ 27,512			$ 170,004	$ 8		$ 205,427
Stock options exercised, net	2	19						21
Unrealized gain on available for sale investments, net of tax						$ (8)		(8)
Long-term incentive compensation		447						447
Stock-based compensation	103	3,770						3,873
Treasury stock purchases			$ (1,563)					(1,563)
Cash dividends declared					(5,782)			(5,782)
Net income (loss)					(26,844)			(26,844)
Balance, ending at Jun. 30, 2020	8,008	31,748	(1,563)		137,312			175,505
Stock options exercised, net	13	(30)						(17)
Long-term incentive compensation		2,321						2,321
Stock-based compensation	112	(24)						88
Treasury stock purchases			(29,757)					(29,757)
Cash dividends declared					(3,220)			(3,220)
Net income (loss)					23,048			23,048
Balance, ending at Jun. 30, 2021	8,133	34,015	(31,320)		157,140			167,968
Stock options exercised, net	7	110						117
Long-term incentive compensation		51						51
Stock-based compensation	50	291						341
Treasury stock purchases			(35,052)					(35,052)
Cash dividends declared					(3,718)			(3,718)
Net income (loss)					1,853			1,853
Balance, ending at Jun. 30, 2022	$ 8,190	$ 34,467	$ (66,372)		$ 155,275			$ 131,560