Note L - Restructuring of Operations (Details Textual) Pure in Thousands, $ in Thousands	3 Months Ended						9 Months Ended		94 Months Ended
	Mar. 31, 2023 USD ($)	Dec. 30, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 25, 2022 USD ($)	Dec. 31, 2021 USD ($)	Mar. 31, 2023 USD ($)	Mar. 25, 2022 USD ($)	Mar. 31, 2023 USD ($)	Jun. 30, 2021 USD ($)
Restructuring Reserve, Ending Balance	$ 970			$ 1,024			$ 970		$ 970
Restructuring Charges	33				$ 303		208	$ 1,542
Proceeds from Sale of Property, Plant, and Equipment, Total							7,177	9,152
Gain (Loss) on Disposition of Assets, Total							4,237	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
Restructuring Charges	$ 33				303		$ 208	$ 1,542	$ 16,406
Restructuring and Related Cost, Number of Positions Eliminated									254
Impairment of Long-Lived Assets to be Disposed of					$ 4,267