Note J - Shareholders' Equity - Accumulated Other Comprehensive Income (Loss), Net of Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Balance	$ 155,054	$ 145,517
Balance	164,391	155,054
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	(849)	(1,582)
Other comprehensive loss before reclassifications	15,885	733
Amounts reclassified from accumulated other comprehensive income (loss)		0
Net current period other comprehensive income (loss)	15,885	733
Balance	15,036	(849)
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member]
Balance	(8,062)	(5,948)
Other comprehensive loss before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income (loss)	(1,591)	(2,114)
Net current period other comprehensive income (loss)	(3,399)	(2,114)
Return on plan assets	(1,808)
Balance	(11,461)	(8,062)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Balance	504	688
Other comprehensive loss before reclassifications	0
Amounts reclassified from accumulated other comprehensive income (loss)	(220)	(184)
Net current period other comprehensive income (loss)	(220)	(184)
Balance	284	504
Accumulated Gain (Loss), Net, Net Investment Hedge [Member]
Balance	1,502	1,272
Other comprehensive loss before reclassifications	0
Amounts reclassified from accumulated other comprehensive income (loss)	(1,631)	230
Net current period other comprehensive income (loss)	(1,631)	230
Balance	$ (129)	$ 1,502