Note E - Business Segments - Net Sales by Product Group (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
Intersegment Eliminations [Member]
Net Sales	(20,774)	(20,719)	(52,842)	(51,911)
Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	56,403	52,138	147,296	132,338
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
Distribution Segment [Member] | Intersegment Eliminations [Member]
Net Sales	(4,102)	(5,645)	(12,027)	(14,019)
Industrial [Member]
Net Sales	8,461	5,836	22,300	16,543
Industrial [Member] | Intersegment Eliminations [Member]
Net Sales	(935)	(1,307)	(3,016)	(3,369)
Industrial [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	7,947	5,652	20,939	15,744
Industrial [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	1,449	1,491	4,377	4,168
Land Based Transmissions [Member]
Net Sales	16,086	15,266	41,646	39,267
Land Based Transmissions [Member] | Intersegment Eliminations [Member]
Net Sales	(8,535)	(5,419)	(18,287)	(14,388)
Land Based Transmissions [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	17,448	13,793	41,158	34,388
Land Based Transmissions [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	7,173	6,892	18,775	19,267
Marine and Propulsion Systems [Member]
Net Sales	33,162	33,736	95,315	90,053
Marine and Propulsion Systems [Member] | Intersegment Eliminations [Member]
Net Sales	(10,766)	(13,951)	(30,983)	(34,095)
Marine and Propulsion Systems [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	30,820	32,671	84,968	82,152
Marine and Propulsion Systems [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	13,108	15,016	41,330	41,996
Other [Member]
Net Sales	1,580	2,802	7,678	6,514
Other [Member] | Intersegment Eliminations [Member]
Net Sales	(538)	(42)	(556)	(59)
Other [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	188	22	231	54
Other [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	$ 1,930	$ 2,822	$ 8,003	$ 6,519