Note K - Shareholders' Equity - Accumulated Other Comprehensive Income (Loss), Net of Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Balance	$ 143,616	$ 123,567
Release stranded tax effects
Balance	182,818	143,616
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	7,085	6,130
Other comprehensive income before reclassifications	(2,646)	955
Amounts reclassified from accumulated other comprehensive income
Net current period other comprehensive income	(2,646)	955
Release stranded tax effects
Balance	4,439	7,085
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member]
Balance	(30,877)	(38,801)
Other comprehensive income before reclassifications	(6,068)	5,824
Amounts reclassified from accumulated other comprehensive income	1,947	2,100
Net current period other comprehensive income	(11,024)	7,924
Release stranded tax effects	(6,903)
Balance	(41,901)	(30,877)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Balance
Other comprehensive income before reclassifications	(509)
Amounts reclassified from accumulated other comprehensive income
Net current period other comprehensive income	(509)
Release stranded tax effects
Balance	$ (509)