Note K - Business Segments and Foreign Operations - Reconciliation of Reportable Segments Other Significant Reconciling Items to Consolidated Totals (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Interest income	$ 64	$ 33
Interest expense	1,443	2,253
Income taxes	4,121	3,788
Depreciation and amortization	9,981	9,359
Assets	312,058	289,181
Expenditures for segment assets	8,707	7,918
Depreciation and amortization		9,359
Operating Segments [Member]
Interest income	679	1,135
Interest expense	1,998	3,301
Income taxes	3,409	4,307
Depreciation and amortization	8,947	8,867
Assets	516,182	450,881
Expenditures for segment assets	8,035	5,710
Depreciation and amortization		8,868
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member]
Interest income	(615)	(1,102)
Interest expense	(555)	(1,048)
Income taxes	712	(519)
Depreciation and amortization	1,034
Assets	(204,124)	(161,700)
Expenditures for segment assets	$ 672	2,208
Depreciation and amortization		$ 491