Note G - Segment Information - Operating Results by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Net sales	$ 31,815	$ 25,135	$ 93,224	$ 89,761
Income from operations	2,523	993	6,687	7,642
Operating Segments [Member]
Income from operations	4,252	2,353	11,585	12,208
Corporate, Non-Segment [Member]
Income from operations	(1,729)	(1,542)	(4,898)	(4,566)
Private Label Contract Manufacturing [Member]
Net sales	25,648	18,544	77,225	69,787
Private Label Contract Manufacturing [Member] | Operating Segments [Member]
Income from operations	2,229	749	7,870	6,182
Patent and Trademark Licensing [Member]
Net sales	6,167	6,591	15,999	19,974
Patent and Trademark Licensing [Member] | Operating Segments [Member]
Income from operations	$ 2,023	$ 1,786	$ 3,715	$ 6,026