Note E - Business Segments - Net Sales by Product Group (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 25, 2022	Mar. 31, 2023	Mar. 25, 2022
Net Sales	$ 73,772	$ 59,289	$ 193,036	$ 166,939
Operating Segments [Member] | Manufacturing Segment [Member]
Net Sales	63,932	56,403	169,607	147,296
Operating Segments [Member] | Distribution Segment [Member]
Net Sales	33,839	23,660	83,732	72,485
Intersegment Eliminations [Member]
Net Sales	(23,999)	(20,774)	(60,303)	(52,842)
Intersegment Eliminations [Member] | Manufacturing Segment [Member]
Net Sales	(18,531)	(16,672)	(46,373)	(40,815)
Intersegment Eliminations [Member] | Distribution Segment [Member]
Net Sales	(5,468)	(4,102)	(13,930)	(12,027)
Industrial [Member]
Net Sales	7,303	8,461	21,846	22,300
Industrial [Member] | Operating Segments [Member] | Manufacturing Segment [Member]
Net Sales	7,076	7,947	20,732	20,939
Industrial [Member] | Operating Segments [Member] | Distribution Segment [Member]
Net Sales	1,548	1,449	4,322	4,377
Industrial [Member] | Intersegment Eliminations [Member]
Net Sales	(1,321)	(935)	(3,208)	(3,016)
Land Based Transmissions [Member]
Net Sales	19,575	16,086	50,184	41,646
Land Based Transmissions [Member] | Operating Segments [Member] | Manufacturing Segment [Member]
Net Sales	16,785	17,448	48,329	41,158
Land Based Transmissions [Member] | Operating Segments [Member] | Distribution Segment [Member]
Net Sales	8,692	7,173	16,743	18,775
Land Based Transmissions [Member] | Intersegment Eliminations [Member]
Net Sales	(5,902)	(8,535)	(14,888)	(18,287)
Marine and Propulsion Systems [Member]
Net Sales	43,854	33,162	109,633	95,315
Marine and Propulsion Systems [Member] | Operating Segments [Member] | Manufacturing Segment [Member]
Net Sales	40,492	30,820	100,546	84,968
Marine and Propulsion Systems [Member] | Operating Segments [Member] | Distribution Segment [Member]
Net Sales	19,867	13,108	49,838	41,330
Marine and Propulsion Systems [Member] | Intersegment Eliminations [Member]
Net Sales	(16,505)	(10,766)	(40,751)	(30,983)
Other [Member]
Net Sales	3,040	1,580	11,373	7,678
Other [Member] | Operating Segments [Member] | Manufacturing Segment [Member]
Net Sales	(421)	188	0	231
Other [Member] | Operating Segments [Member] | Distribution Segment [Member]
Net Sales	3,732	1,930	12,829	8,003
Other [Member] | Intersegment Eliminations [Member]
Net Sales	$ (271)	$ (538)	$ (1,456)	$ (556)