Note B - Acquisition of Veth Propulsion Holding BV - Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Mar. 29, 2019	Mar. 29, 2019
Intangible assets, estimated fair value		$ 24,000
Intangible assets, estimated average useful lives (Year)		10 years
Customer Relationships [Member]
Intangible assets, estimated fair value		$ 13,800
Technology-Based Intangible Assets [Member]
Intangible assets, estimated fair value		8,400
Trade Names [Member]
Intangible assets, estimated fair value		$ 1,800
Veth Propulsion [Member]
Intangible assets, estimated fair value	$ 24,000
Intangible assets, annual amortization	2,530
Veth Propulsion [Member] | Customer Relationships [Member]
Intangible assets, estimated fair value	$ 13,800
Intangible assets, estimated average useful lives (Year)	12 years
Intangible assets, annual amortization	$ 1,150
Veth Propulsion [Member] | Technology-Based Intangible Assets [Member]
Intangible assets, estimated fair value	$ 8,400
Intangible assets, estimated average useful lives (Year)	7 years
Intangible assets, annual amortization	$ 1,200
Veth Propulsion [Member] | Trade Names [Member]
Intangible assets, estimated fair value	$ 1,800
Intangible assets, estimated average useful lives (Year)	10 years
Intangible assets, annual amortization	$ 180