Note H - Segment Information - Operating Results by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Net sales	$ 37,730	$ 33,150
Cost of goods sold	33,333	30,891
Gross profit	4,397	2,259
Selling, general and administrative expenses	4,113	4,095
Income (loss) from operations	284	(1,836)
Interest income	30	33
Interest expense	(226)	(178)
Foreign exchange loss	(301)	(431)
Other, net	14	(1)
Total other expense	(483)	(577)
Income (loss) before income taxes	(199)	(2,413)
Provision for income taxes	92	(431)
Net loss	(291)	(1,982)
Stock-based compensation	177	276
Depreciation and amortization	1,166	1,127
Capital expenditures		301
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Net sales	0	0
Cost of goods sold	0	0
Gross profit	0	0
Selling, general and administrative expenses	2,231	2,188
Income (loss) from operations	(2,231)	(2,188)
Interest income	0	0
Interest expense	0	0
Foreign exchange loss	0	0
Other, net	0	0
Total other expense	0	0
Income (loss) before income taxes	(2,231)	(2,188)
Provision for income taxes
Net loss
Stock-based compensation	0	0
Depreciation and amortization	0	0
Capital expenditures	0	0
Private Label Contract Manufacturing [Member] | Operating Segments [Member]
Net sales	36,065	30,630
Cost of goods sold	32,909	30,001
Gross profit	3,156	629
Selling, general and administrative expenses	1,353	1,274
Income (loss) from operations	1,803	(645)
Interest income	30	33
Interest expense	(226)	(178)
Foreign exchange loss	(301)	(431)
Other, net	14	(1)
Total other expense	(483)	(577)
Income (loss) before income taxes	1,320	(1,222)
Provision for income taxes
Net loss
Stock-based compensation	162	251
Depreciation and amortization	1,164	1,125
Capital expenditures	1,030	301
Patent and Trademark Licensing [Member] | Operating Segments [Member]
Net sales	1,665	2,520
Cost of goods sold	424	890
Gross profit	1,241	1,630
Selling, general and administrative expenses	529	633
Income (loss) from operations	712	997
Interest income	0	0
Interest expense	0	0
Foreign exchange loss	0	0
Other, net	0	0
Total other expense	0	0
Income (loss) before income taxes	712	997
Provision for income taxes
Net loss
Stock-based compensation	15	25
Depreciation and amortization	2	2
Capital expenditures	$ 0	$ 0