Note E - Business Segments - Revenues by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 25, 2022	Mar. 26, 2021	Mar. 25, 2022	Mar. 26, 2021
Net sales	$ 59,289	$ 57,640	$ 166,939	$ 152,377
Net income (loss)	2,231	94	316	(8,198)
Intersegment Eliminations [Member]
Net sales	(20,774)	(20,719)	(52,842)	(51,911)
Corporate, Non-Segment [Member]
Net income (loss)	(5,184)	(3,025)	(12,310)	(7,198)
Manufacturing Segment [Member] | Operating Segments [Member]
Net sales	56,403	52,138	147,296	132,338
Net income (loss)	6,000	2,422	9,230	(3,352)
Manufacturing Segment [Member] | Intersegment Eliminations [Member]
Net sales	(16,672)	(15,074)	(40,815)	(37,892)
Distribution Segment [Member] | Operating Segments [Member]
Net sales	23,660	26,221	72,485	71,950
Net income (loss)	1,415	697	3,396	2,352
Distribution Segment [Member] | Intersegment Eliminations [Member]
Net sales	$ (4,102)	$ (5,645)	$ (12,027)	$ (14,019)