Note E - Business Segments - Net Sales by Product Group (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
Intersegment Eliminations [Member]
Net Sales	(20,719)	(18,628)	(51,911)	(55,988)
Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	52,138	58,877	132,338	170,611
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
Distribution Segment [Member] | Intersegment Eliminations [Member]
Net Sales	(5,645)	(4,635)	(14,019)	(13,060)
Industrial [Member]
Net Sales	5,836	6,850	16,543	20,938
Industrial [Member] | Intersegment Eliminations [Member]
Net Sales	(1,307)	(619)	(3,369)	(2,183)
Industrial [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	5,652	5,709	15,744	18,409
Industrial [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	1,491	1,760	4,168	4,712
Land Based Transmissions [Member]
Net Sales	15,266	17,637	39,267	48,462
Land Based Transmissions [Member] | Intersegment Eliminations [Member]
Net Sales	(5,419)	(6,599)	(14,388)	(21,466)
Land Based Transmissions [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	13,793	15,185	34,388	49,159
Land Based Transmissions [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	6,892	9,051	19,267	20,769
Marine and Propulsion Systems [Member]
Net Sales	33,736	42,376	90,053	114,096
Marine and Propulsion Systems [Member] | Intersegment Eliminations [Member]
Net Sales	(13,951)	(11,409)	(34,095)	(32,337)
Marine and Propulsion Systems [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	32,671	37,968	82,152	102,988
Marine and Propulsion Systems [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	15,016	15,817	41,996	43,445
Other [Member]
Net Sales	2,802	1,773	6,514	3,966
Other [Member] | Intersegment Eliminations [Member]
Net Sales	(42)	(1)	(59)	(2)
Other [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	22	15	54	55
Other [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	$ 2,822	$ 1,759	$ 6,519	$ 3,913