Note G - Segment Information - Operating Results by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Net sales	$ 35,455	$ 31,815	$ 108,030	$ 93,224
Income from operations	1,835	2,523	6,766	6,687
Operating Segments [Member]
Income from operations	4,004	4,252	13,279	11,585
Corporate, Non-Segment [Member]
Income from operations	(2,169)	(1,729)	(6,513)	(4,898)
Private Label Contract Manufacturing [Member]
Net sales	31,758	25,648	94,505	77,225
Private Label Contract Manufacturing [Member] | Operating Segments [Member]
Income from operations	3,534	2,229	9,534	7,870
Patent and Trademark Licensing [Member]
Net sales	3,697	6,167	13,525	15,999
Patent and Trademark Licensing [Member] | Operating Segments [Member]
Income from operations	$ 470	$ 2,023	$ 3,745	$ 3,715