Note E - Business Segments - Net Sales by Product Group (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 27, 2020	Mar. 29, 2019	Mar. 27, 2020	Mar. 29, 2019
Net Sales	$ 68,636	$ 77,420	$ 187,462	$ 230,216
Intersegment Eliminations [Member]
Net Sales	(18,628)	(21,501)	(55,988)	(58,614)
Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	58,877	71,374	170,611	211,273
Manufacturing Segment [Member] | Intersegment Eliminations [Member]
Net Sales	(13,993)	(16,272)	(42,928)	(45,953)
Distribution Segment [Member] | Operating Segments [Member]
Net Sales	28,387	27,547	72,839	77,557
Distribution Segment [Member] | Intersegment Eliminations [Member]
Net Sales	(4,635)	(5,229)	(13,060)	(12,661)
Industrial [Member]
Net Sales	6,850	9,536	20,938	25,698
Industrial [Member] | Intersegment Eliminations [Member]
Net Sales	(619)	(1,070)	(2,183)	(3,619)
Industrial [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	5,709	8,149	18,409	22,883
Industrial [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	1,760	2,457	4,712	6,434
Land Based Transmissions [Member]
Net Sales	17,637	26,904	48,462	86,319
Land Based Transmissions [Member] | Intersegment Eliminations [Member]
Net Sales	(6,599)	(8,538)	(21,466)	(21,322)
Land Based Transmissions [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	15,185	27,133	49,159	86,876
Land Based Transmissions [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	9,051	8,309	20,769	20,765
Marine and Propulsion Systems [Member]
Net Sales	42,376	39,741	114,096	113,872
Marine and Propulsion Systems [Member] | Intersegment Eliminations [Member]
Net Sales	(11,409)	(11,908)	(32,337)	(33,629)
Marine and Propulsion Systems [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	37,968	36,076	102,988	101,464
Marine and Propulsion Systems [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	15,817	15,573	43,445	46,037
Other [Member]
Net Sales	1,773	1,239	3,966	4,327
Other [Member] | Intersegment Eliminations [Member]
Net Sales	(1)	15	(2)	(44)
Other [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	15	16	55	50
Other [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	$ 1,759	$ 1,208	$ 3,913	$ 4,321