Note E - Other Comprehensive Income - Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Balance	$ 88,772	$ 88,520
Balance	82,595	88,772
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance	(380)	(444)
OCI/OCL before reclassifications	88	8
Amounts reclassified from OCI	39	78
Tax effect of OCI activity	(25)	(22)
Net current period OCI/OCL	102	64
Balance	(278)	(380)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Balance	(110)	1,795
OCI/OCL before reclassifications	538	538
Amounts reclassified from OCI	(92)	(3,086)
Tax effect of OCI activity	(164)	643
Net current period OCI/OCL	282	(1,905)
Balance	172	(110)
Accumulated Gain (Loss), Net, Swap Derivative, Parent [Member]
Balance	407	348
OCI/OCL before reclassifications	(422)	79
Amounts reclassified from OCI	0	0
Tax effect of OCI activity	99	(20)
Net current period OCI/OCL	(323)	59
Balance	84	407
AOCI Attributable to Parent [Member]
Balance	(83)	1,699
OCI/OCL before reclassifications	204	625
Amounts reclassified from OCI	(53)	(3,008)
Tax effect of OCI activity	(90)	601
Net current period OCI/OCL	61	(1,782)
Balance	$ (22)	$ (83)