Note E - Business Segments - Net Sales by Product Group (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 27, 2019	Dec. 28, 2018	Dec. 27, 2019	Dec. 28, 2018
Net Sales	$ 59,536	$ 78,107	$ 118,826	$ 152,796
Intersegment Eliminations [Member]
Net Sales	(19,662)	(19,969)	(37,360)	(37,113)
Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	57,173	70,986	111,734	139,899
Manufacturing Segment [Member] | Intersegment Eliminations [Member]
Net Sales	(15,105)	(14,931)	(28,935)	(29,681)
Distribution Segment [Member] | Operating Segments [Member]
Net Sales	22,025	27,090	44,452	50,010
Distribution Segment [Member] | Intersegment Eliminations [Member]
Net Sales	(4,557)	(5,038)	(8,425)	(7,432)
Industrial [Member]
Net Sales	6,625	9,116	14,088	16,162
Industrial [Member] | Intersegment Eliminations [Member]
Net Sales	(751)	(1,717)	(1,564)	(2,549)
Industrial [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	5,892	8,253	12,700	14,734
Industrial [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	1,484	2,580	2,952	3,977
Land Based Transmissions [Member]
Net Sales	15,305	29,778	30,824	59,414
Land Based Transmissions [Member] | Intersegment Eliminations [Member]
Net Sales	(7,492)	(7,377)	(14,867)	(12,784)
Land Based Transmissions [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	16,559	30,309	33,973	59,742
Land Based Transmissions [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	6,238	6,846	11,718	12,456
Marine and Propulsion Systems [Member]
Net Sales	36,699	37,856	71,720	74,131
Marine and Propulsion Systems [Member] | Intersegment Eliminations [Member]
Net Sales	(11,419)	(10,863)	(20,928)	(21,721)
Marine and Propulsion Systems [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	34,700	32,412	65,020	65,388
Marine and Propulsion Systems [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	13,418	16,307	27,628	30,464
Other [Member]
Net Sales	907	1,357	2,194	3,089
Other [Member] | Intersegment Eliminations [Member]
Net Sales		(12)	(1)	(59)
Other [Member] | Manufacturing Segment [Member] | Operating Segments [Member]
Net Sales	22	12	41	35
Other [Member] | Distribution Segment [Member] | Operating Segments [Member]
Net Sales	$ 885	$ 1,357	$ 2,154	$ 3,113