Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - 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, 2019	$ 861	$ 11,017	$ 101,774	$ (1,006)	$ (277)	$ 112,369
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared			(432)			(432)
Net income			4,863			4,863
Other comprehensive loss, net of taxes				(271)		(271)
Balance at Sep. 30, 2019	861	11,017	106,205	(1,277)	(277)	116,529
Balance at Jun. 30, 2020	861	11,017	118,263	(428)	(908)	128,805
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared			(468)			(468)
Net income			4,875			4,875
Other comprehensive loss, net of taxes				(190)		(190)
Balance at Sep. 30, 2020	$ 861	$ 11,017	$ 122,670	$ (618)	$ (908)	$ 133,022