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
Stock-based compensation	2	954			956
Vesting of restricted stock units and restricted shares	55	(387)			(332)
Treasury stock purchases			(9,000)		(9,000)
Cash dividends declared				(383)	(383)
Net (loss) income				3,879	3,879
Balance, ending at Sep. 30, 2020	8,065	32,315	(10,563)	140,808	170,625
Balance, beginning at Jun. 30, 2020	8,008	31,748	(1,563)	137,312	175,505
Net (loss) income					12,329
Balance, ending at Dec. 31, 2020	8,082	33,373	(21,576)	148,528	168,407
Balance, beginning at Sep. 30, 2020	8,065	32,315	(10,563)	140,808	170,625
Stock-based compensation	10	1,017			1,027
Stock options exercised	7	41			48
Treasury stock purchases			(11,013)		(11,013)
Cash dividends declared				(730)	(730)
Net (loss) income				8,450	8,450
Balance, ending at Dec. 31, 2020	8,082	33,373	(21,576)	148,528	168,407
Balance, beginning at Jun. 30, 2021	8,133	34,015	(31,320)	157,140	167,968
Stock-based compensation	3	1,159			1,162
Vesting of restricted stock units and restricted shares	7	(257)			(250)
Treasury stock purchases			(1,915)		(1,915)
Cash dividends declared				(1,047)	(1,047)
Net (loss) income				4,353	4,353
Balance, ending at Sep. 30, 2021	8,143	34,917	(33,235)	160,446	170,271
Balance, beginning at Jun. 30, 2021	8,133	34,015	(31,320)	157,140	167,968
Net (loss) income					(3,192)
Balance, ending at Dec. 31, 2021	8,153	36,001	(40,978)	151,888	155,064
Balance, beginning at Sep. 30, 2021	8,143	34,917	(33,235)	160,446	170,271
Stock-based compensation	4	1,016			1,020
Vesting of restricted stock units and restricted shares	(2)	(42)			(44)
Stock options exercised	8	110			118
Treasury stock purchases			(7,743)		(7,743)
Cash dividends declared				(1,013)	(1,013)
Net (loss) income				(7,545)	(7,545)
Balance, ending at Dec. 31, 2021	$ 8,153	$ 36,001	$ (40,978)	$ 151,888	$ 155,064