Note G - Segment Information - Operating Results by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Net sales	$ 36,532	$ 28,074
Income from operations	2,724	1,883
Operating Segments [Member]
Income from operations	4,947	3,445
Corporate, Non-Segment [Member]
Income from operations	(2,223)	(1,562)
Private Label Contract Manufacturing [Member]
Net sales	31,087	22,222
Private Label Contract Manufacturing [Member] | Operating Segments [Member]
Income from operations	3,145	2,257
Patent and Trademark Licensing [Member]
Net sales	5,445	5,852
Patent and Trademark Licensing [Member] | Operating Segments [Member]
Income from operations	$ 1,802	$ 1,188