Note E - Business Segments - Revenues by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 26, 2021	Mar. 27, 2020	Mar. 26, 2021	Mar. 27, 2020
Net sales	$ 57,640	$ 68,636	$ 152,377	$ 187,462
Net income (loss)	94	(25,230)	(8,198)	(38,057)
Intersegment Eliminations [Member]
Net sales	(20,719)	(18,628)	(51,911)	(55,988)
Corporate, Non-Segment [Member]
Net income (loss)	(3,025)	638	(7,198)	(6,332)
Manufacturing Segment [Member] | Operating Segments [Member]
Net sales	52,138	58,877	132,338	170,611
Net income (loss)	2,422	(26,859)	(3,352)	(34,650)
Manufacturing Segment [Member] | Intersegment Eliminations [Member]
Net sales	(15,074)	(13,993)	(37,892)	(42,928)
Distribution Segment [Member] | Operating Segments [Member]
Net sales	26,221	28,387	71,950	72,839
Net income (loss)	697	991	2,352	2,925
Distribution Segment [Member] | Intersegment Eliminations [Member]
Net sales	$ (5,645)	$ (4,635)	$ (14,019)	$ (13,060)