Note E - Other Comprehensive Loss - Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Balance	$ 71,375	$ 76,084
Balance	80,083	71,375
Reclassification pursuant to adoption of ASU 2018-02 (Note A)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance	(888)	(491)
OCI/OCL before reclassifications	337	(404)
Amounts reclassified from OCI	123	(20)
Tax effect of OCI activity	(110)	101
Net current period OCI/OCL	350	(397)
Balance	(538)	(888)
Reclassification pursuant to adoption of ASU 2018-02 (Note A)		(74)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Balance	(295)	783
OCI/OCL before reclassifications	(2,817)	1,400
Amounts reclassified from OCI	3,173	(2,747)
Tax effect of OCI activity	(84)	323
Net current period OCI/OCL	272	(1,078)
Balance	(23)	(295)
Reclassification pursuant to adoption of ASU 2018-02 (Note A)		(54)
AOCI Attributable to Parent [Member]
Balance	(1,183)	292
OCI/OCL before reclassifications	(2,480)	988
Amounts reclassified from OCI	3,296	(2,759)
Tax effect of OCI activity	(194)	424
Net current period OCI/OCL	622	(1,475)
Balance	$ (561)	(1,183)
Reclassification pursuant to adoption of ASU 2018-02 (Note A)		$ (128)