Note E - Business Segments - Net Sales by Product Group (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 24, 2021	Sep. 25, 2020
Net Sales	$ 47,761	$ 46,179
Intersegment Eliminations [Member]
Net Sales	(14,367)	(14,822)
Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	41,594	38,495
Manufacturing Segment [Member] | Intersegment Eliminations [Member]
Net Sales	(10,942)	(10,738)
Distribution Segment [Member] | Operating Segments [Member]
Net Sales	20,534	22,506
Distribution Segment [Member] | Intersegment Eliminations [Member]
Net Sales	(3,425)	(4,084)
Industrial [Member]
Net Sales	6,132	5,423
Industrial [Member] | Intersegment Eliminations [Member]
Net Sales	(893)	(753)
Industrial [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	5,907	4,806
Industrial [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	1,118	1,370
Land Based Transmissions [Member]
Net Sales	12,242	12,259
Land Based Transmissions [Member] | Intersegment Eliminations [Member]
Net Sales	(4,247)	(4,302)
Land Based Transmissions [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	11,384	10,494
Land Based Transmissions [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	5,105	6,067
Marine and Propulsion Systems [Member]
Net Sales	26,633	26,176
Marine and Propulsion Systems [Member] | Intersegment Eliminations [Member]
Net Sales	(9,214)	(9,762)
Marine and Propulsion Systems [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	24,285	23,179
Marine and Propulsion Systems [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	11,562	12,759
Other [Member]
Net Sales	2,754	2,321
Other [Member] | Intersegment Eliminations [Member]
Net Sales	(13)	(5)
Other [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	18	16
Other [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	$ 2,749	$ 2,310