Note M - Segment Information - Operating Results by Business Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Net sales	$ 138,290	$ 132,437
Income from operations	5,961	9,533
Operating Segments [Member]
Income from operations	14,124	16,212
Corporate, Non-Segment [Member]
Income from operations	(8,163)	(6,679)
Private Label Contract Manufacturing [Member]
Net sales	121,598	110,992
Private Label Contract Manufacturing [Member] | Operating Segments [Member]
Income from operations	11,232	8,569
Patent and Trademark Licensing [Member]
Net sales	16,692	21,445
Patent and Trademark Licensing [Member] | Operating Segments [Member]
Income from operations	$ 2,892	$ 5,730