Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Total
Balance at Jun. 30, 2020	$ 861	$ 11,017	$ 118,263	$ (428)	$ (908)	$ 128,805
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared			(2,430)			(2,430)
Net income			23,942			23,942
Other comprehensive loss, net of taxes				(733)		(733)
Balance at Jun. 30, 2021	861	11,017	139,775	(1,161)	(908)	149,584
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared			(2,634)			(2,634)
Net income			27,986			27,986
Other comprehensive loss, net of taxes				(17,222)		(17,222)
Balance at Jun. 30, 2022	$ 861	$ 11,017	$ 165,127	$ (18,383)	$ (908)	$ 157,714