Note E - Business Segments - Net Sales by Product Group (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 25, 2020	Sep. 27, 2019
Net Sales	$ 46,143	$ 59,290
Intersegment Eliminations [Member]
Net Sales	(14,858)	(17,699)
Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	38,495	54,561
Manufacturing Segment [Member] | Intersegment Eliminations [Member]
Net Sales	(10,738)	(13,830)
Distribution Segment [Member] | Operating Segments [Member]
Net Sales	22,506	22,428
Distribution Segment [Member] | Intersegment Eliminations [Member]
Net Sales	(4,120)	(3,869)
Industrial [Member]
Net Sales	5,783	7,464
Industrial [Member] | Intersegment Eliminations [Member]
Net Sales	(393)	(812)
Industrial [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	4,806	6,808
Industrial [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	1,370	1,468
Land Based Transmissions [Member]
Net Sales	11,833	15,518
Land Based Transmissions [Member] | Intersegment Eliminations [Member]
Net Sales	(4,728)	(7,376)
Land Based Transmissions [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	10,494	17,414
Land Based Transmissions [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	6,067	5,480
Marine and Propulsion Systems [Member]
Net Sales	26,206	35,021
Marine and Propulsion Systems [Member] | Intersegment Eliminations [Member]
Net Sales	(9,732)	(9,510)
Marine and Propulsion Systems [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	23,179	30,320
Marine and Propulsion Systems [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	12,759	14,211
Other [Member]
Net Sales	2,321	1,287
Other [Member] | Intersegment Eliminations [Member]
Net Sales	(5)	(1)
Other [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	16	19
Other [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	$ 2,310	$ 1,269