Note E - Business Segments - Net Sales by Product Group (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 27, 2019	Sep. 28, 2018
Net Sales	$ 59,290	$ 74,689
Intersegment Eliminations [Member]
Net Sales	(17,699)	(17,143)
Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	54,561	68,912
Manufacturing Segment [Member] | Intersegment Eliminations [Member]
Net Sales	(13,830)	(14,749)
Distribution Segment [Member] | Operating Segments [Member]
Net Sales	22,428	22,920
Distribution Segment [Member] | Intersegment Eliminations [Member]
Net Sales	(3,869)	(2,394)
Industrial [Member]
Net Sales	7,464	7,045
Industrial [Member] | Intersegment Eliminations [Member]
Net Sales	(812)	(832)
Industrial [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	6,808	6,481
Industrial [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	1,468	1,396
Land Based Transmissions [Member]
Net Sales	15,518	29,636
Land Based Transmissions [Member] | Intersegment Eliminations [Member]
Net Sales	(7,376)	(5,407)
Land Based Transmissions [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	17,414	29,432
Land Based Transmissions [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	5,480	5,611
Marine and Propulsion Systems [Member]
Net Sales	35,021	36,275
Marine and Propulsion Systems [Member] | Intersegment Eliminations [Member]
Net Sales	(9,510)	(10,857)
Marine and Propulsion Systems [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	30,320	32,976
Marine and Propulsion Systems [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	14,211	14,156
Other [Member]
Net Sales	1,287	1,733
Other [Member] | Intersegment Eliminations [Member]
Net Sales	(1)	(47)
Other [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	19	23
Other [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	$ 1,269	$ 1,757