Note D - Other Comprehensive Loss - Schedule of Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025
Balance	$ 67,046	$ 79,141	$ 68,426	$ 82,595
Balance	63,110	76,619	63,110	76,619
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance	(228)	(286)	(228)	(278)
OCI before reclassifications	0	0	0	0
Amounts reclassified to sales	0	0	0	0
Net current period OCI	0	1	0	(7)
Tax effect of OCI activity		1		(7)
Balance	(228)	(285)	(228)	(285)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Balance	(73)	438	(1,187)	172
OCI before reclassifications	129	(433)	551	(57)
Amounts reclassified to sales	187	(91)	879	(138)
Net current period OCI	316	(414)	1,430	(148)
Tax effect of OCI activity		110		47
Balance	243	24	243	24
AOCI Attributable to Parent [Member]
Balance	(301)	152	(1,415)	(22)
OCI before reclassifications	129	(433)	551	(168)
Amounts reclassified to sales	187	(91)	879	(138)
Net current period OCI	316	(413)	1,430	(239)
Tax effect of OCI activity		111		67
Balance	$ 15	(261)	$ 15	(261)
Accumulated Gain (Loss), Net, Swap Derivative, Parent [Member]
Balance				84
OCI before reclassifications				(111)
Amounts reclassified to sales				0
Net current period OCI				(84)
Tax effect of OCI activity				27
Balance		$ 0		$ 0