Note L - Restructuring of Operations (Details Textual) Pure in Thousands, $ in Thousands	3 Months Ended					6 Months Ended		91 Months Ended
	Dec. 30, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 25, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)
Restructuring Reserve, Ending Balance	$ 1,023		$ 1,024			$ 1,023		$ 1,023
Restructuring Charges, Total	164				$ 1,190	174	$ 1,238
Proceeds from Sale of Property, Plant, and Equipment, Total						7,152	9,152
Gain (Loss) on Disposition of Assets, Total						4,203	2,939
Property, Plant, and Equipment Reclassified to Assets Held for Sale [Member]
Gain (Loss) on Disposition of Assets, Total	4,161
Increase (Decrease) in Assets Held-for-sale		$ 2,801
Propeller Machining Plant and Office in Switzerland [Member]
Proceeds from Sale of Property, Plant, and Equipment, Total	7,150		$ 305		9,138
Propeller Machining Plant and Office in Switzerland [Member] | Other Operating Income (Expense) [Member]
Gain (Loss) on Disposition of Assets, Total					2,939
Employee Severance [Member]
Restructuring Reserve, Ending Balance									$ 2,200
Restructuring Reserve, Settled without Cash	3,200
Restructuring Charges Additional	1,000					1,000		1,000
Restructuring Charges, Total	$ 164				$ 1,190	$ 174	$ 1,238	$ 16,383
Restructuring and Related Cost, Number of Positions Eliminated								254
Impairment of Long-Lived Assets to be Disposed of				$ 4,267