Note N - Segment Information - Operating Results by Business Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Net sales	$ 118,876	$ 138,290
Income from operations	(1,509)	5,961
Operating Segments [Member]
Income from operations	6,538	14,124
Corporate, Non-Segment [Member]
Income from operations	(8,047)	(8,163)
Private Label Contract Manufacturing [Member]
Net sales	106,291	121,598
Private Label Contract Manufacturing [Member] | Operating Segments [Member]
Income from operations	4,030	11,232
Patent and Trademark Licensing [Member]
Net sales	12,585	16,692
Patent and Trademark Licensing [Member] | Operating Segments [Member]
Income from operations	$ 2,508	$ 2,892