Note H - Segment Information - Operating Results by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Net sales	$ 38,340	$ 39,726
Income from operations	4,228	2,085
Operating Segments [Member]
Income from operations	6,366	4,094
Corporate, Non-Segment [Member]
Income from operations	(2,108)	(2,009)
Private Label Contract Manufacturing [Member]
Net sales	33,594	37,047
Private Label Contract Manufacturing [Member] | Operating Segments [Member]
Income from operations	3,700	3,424
Patent and Trademark Licensing [Member]
Net sales	4,746	2,679
Patent and Trademark Licensing [Member] | Operating Segments [Member]
Income from operations	$ 2,636	$ 670