Note D - Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands		12 Months Ended
	Mar. 27, 2020	Jun. 30, 2021	Jun. 30, 2020
Balance, goodwill gross carrying amount		$ 39,202	$ 39,776
Balance, goodwill accumulated impairment		(39,202)	(13,822)
Balance, goodwill net book value		0	25,954
Impairment, goodwill accumulated impairment	$ (25,380)		(25,380)
Translation adjustment, goodwill gross carrying amount		0	(574)
Translation adjustment, goodwill net book value		0	(574)
Balance, goodwill gross carrying amount		39,202	39,202
Balance, goodwill accumulated impairment		(39,202)	(39,202)
Balance at June 30, 2020	$ 25,380	0	0
European Propulsion [Member]
Balance, goodwill net book value		0	23,371
Impairment, goodwill accumulated impairment			(22,822)
Translation adjustment, goodwill gross carrying amount		0	(549)
Translation adjustment, goodwill net book value		0	(549)
Balance at June 30, 2020		0	0
European Industrial [Member]
Balance, goodwill net book value		0	2,583
Impairment, goodwill accumulated impairment			(2,558)
Translation adjustment, goodwill gross carrying amount		0	(25)
Translation adjustment, goodwill net book value		0	(25)
Balance at June 30, 2020		$ 0	$ 0