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	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Accumulated Other Comprehensive Loss [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance at Jun. 30, 2018		$ 861	$ 11,017	$ 86,213	$ (1,623)	$ (277)	$ 96,191
Balance (ASU 2016-01 [Member]) at Jun. 30, 2018	[1]							$ 114	$ (114)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared				(2,037)			(2,037)
Net income				17,484			17,484
Other comprehensive income, net of taxes					731		731
Balance at Jun. 30, 2019		861	11,017	101,774	(1,006)	(277)	112,369
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock repurchases						(631)	(631)
Dividends declared				(2,238)			(2,238)
Net income				18,727			18,727
Other comprehensive income, net of taxes					578		578
Balance at Jun. 30, 2020		$ 861	$ 11,017	$ 118,263	$ (428)	$ (908)	$ 128,805

[1] See Note 1 Impact of Recent Accounting Pronouncements - cumulative effect of change in measurement of equity securities.