Note G - Segment Information - Operating Results by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Net sales	$ 36,043	$ 33,335	$ 72,575	$ 61,409
Income from operations	2,207	2,281	4,931	4,164
Operating Segments [Member]
Income from operations	4,328	3,889	9,275	7,333
Corporate, Non-Segment [Member]
Income from operations	(2,121)	(1,608)	(4,344)	(3,169)
Private Label Contract Manufacturing [Member]
Net sales	31,660	29,355	62,747	51,577
Private Label Contract Manufacturing [Member] | Operating Segments [Member]
Income from operations	2,853	3,385	5,999	5,641
Patent and Trademark Licensing [Member]
Net sales	4,383	3,980	9,828	9,832
Patent and Trademark Licensing [Member] | Operating Segments [Member]
Income from operations	$ 1,475	$ 504	$ 3,276	$ 1,692