Note H - Segment Information - Net Sales by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Net sales	$ 37,727	$ 48,083	$ 76,067	$ 87,809
UNITED STATES
Net sales	25,402	23,074	48,897	42,860
Non-US [Member]
Net sales	$ 12,325	$ 25,009	$ 27,170	$ 44,949