Note H - Segment Information - Net Sales by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Net sales	$ 48,083	$ 29,103	$ 87,809	$ 58,298
UNITED STATES
Net sales	23,074	17,591	42,860	35,776
Non-US [Member]
Net sales	$ 25,009	$ 11,512	$ 44,949	$ 22,522