Note E - Business Segments - Revenues by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 29, 2024	Mar. 31, 2023	Mar. 29, 2024	Mar. 31, 2023
Net sales	$ 74,161	$ 73,772	$ 210,709	$ 193,036
Manufacturing segment net income	3,822	3,281	3,579	3,605
Intersegment Eliminations [Member]
Net sales	(25,501)	(24,420)	(71,953)	(60,303)
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Manufacturing segment net income	(5,088)	(5,252)	(13,146)	(14,128)
Manufacturing Segment [Member] | Operating Segments [Member]
Net sales	62,640	64,353	175,545	169,607
Manufacturing segment net income	5,662	6,480	9,298	13,321
Manufacturing Segment [Member] | Intersegment Eliminations [Member]
Net sales	(19,929)	(18,531)	(58,908)	(46,373)
Distribution Segment [Member] | Operating Segments [Member]
Net sales	37,022	33,839	107,117	83,732
Manufacturing segment net income	3,248	2,053	7,427	4,412
Distribution Segment [Member] | Intersegment Eliminations [Member]
Net sales	$ (5,572)	$ (5,889)	$ (13,045)	$ (13,930)