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
Stockholders' Equity Attributable to Parent, Beginning Balance 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 income				3,879	3,879
Stockholders' Equity Attributable to Parent, Ending Balance at Sep. 30, 2020	8,065	32,315	(10,563)	140,808	170,625
Stockholders' Equity Attributable to Parent, Beginning Balance 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 income				4,353	4,353
Stockholders' Equity Attributable to Parent, Ending Balance at Sep. 30, 2021	$ 8,143	$ 34,917	$ (33,235)	$ 160,446	$ 170,271