Note M - Segment Information - Operating Results by Business Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Net sales	$ 132,437	$ 121,946
Income from operations	9,533	9,702
Operating Segments [Member]
Income from operations	16,212	16,103
Corporate, Non-Segment [Member]
Income from operations	(6,679)	(6,401)
Private Label Contract Manufacturing [Member]
Net sales	110,992	95,024
Private Label Contract Manufacturing [Member] | Operating Segments [Member]
Income from operations	10,482	8,569
Patent and Trademark Licensing [Member]
Net sales	21,445	26,922
Patent and Trademark Licensing [Member] | Operating Segments [Member]
Income from operations	$ 5,730	$ 7,534