Note H - Segment Information - Operating Results by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025
Net sales	$ 35,482	$ 28,766	$ 108,007	$ 95,994
Cost of goods sold	35,099	26,940	100,736	90,240
Gross profit	383	1,826	7,271	5,754
Selling, general and administrative expenses	4,397	3,926	12,848	12,470
(Loss) income from operations	(4,014)	(2,100)	(5,577)	(6,716)
Interest expense	(270)	(246)	(720)	(703)
Foreign exchange loss	50	(339)	(445)	(616)
Other, net	(9)	(8)	(59)	(11)
Total other expense	(229)	(542)	(1,194)	(1,205)
(Loss) income before income taxes	(4,243)	(2,642)	(6,771)	(7,921)
Provision for income taxes	68	(456)	384	(1,562)
Net loss	(4,311)	(2,186)	(7,155)	(6,359)
Stock-based compensation	140	245	495	798
Depreciation and amortization	1,194	1,139	3,526	3,400
Capital expenditures	1,100	802	3,064	2,159
Interest income	0	51	30	125
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Net sales	0	0	0	0
Cost of goods sold	0	0	0	0
Gross profit	0	0	0	0
Selling, general and administrative expenses	2,279	2,278	6,750	6,805
(Loss) income from operations	(2,279)	(2,278)	(6,750)	(6,805)
Interest expense	0	0	0	0
Foreign exchange loss	0	0	0	0
Other, net	0	0	0	0
Total other expense	0	0	0	0
(Loss) income before income taxes	(2,279)	(2,278)	(6,750)	(6,805)
Stock-based compensation	0	0	0	0
Depreciation and amortization	0	0	0	0
Capital expenditures	0	0	0	0
Interest income		0	0	0
Private Label Contract Manufacturing [Member] | Operating Segments [Member]
Net sales	33,809	27,075	102,678	90,021
Cost of goods sold	34,619	26,415	98,989	88,332
Gross profit	(810)	660	3,689	1,689
Selling, general and administrative expenses	1,469	1,216	4,341	4,045
(Loss) income from operations	(2,279)	(556)	(652)	(2,356)
Interest expense	(270)	(246)	(720)	(703)
Foreign exchange loss	50	(339)	(445)	(616)
Other, net	(9)	(8)	(59)	(11)
Total other expense	(229)	(542)	(1,194)	(1,205)
(Loss) income before income taxes	(2,508)	(1,098)	(1,846)	(3,561)
Stock-based compensation	128	222	452	725
Depreciation and amortization	1,192	1,137	3,521	3,395
Capital expenditures	1,100	802	3,064	2,159
Interest income		51	30	125
Patent and Trademark Licensing [Member] | Operating Segments [Member]
Net sales	1,673	1,691	5,329	5,973
Cost of goods sold	480	525	1,747	1,908
Gross profit	1,193	1,166	3,582	4,065
Selling, general and administrative expenses	649	432	1,757	1,620
(Loss) income from operations	544	734	1,825	2,445
Interest expense	0	0	0	0
Foreign exchange loss	0	0	0	0
Other, net	0	0	0	0
Total other expense	0	0	0	0
(Loss) income before income taxes	544	734	1,825	2,445
Stock-based compensation	12	23	43	73
Depreciation and amortization	2	2	5	5
Capital expenditures	$ 0	0	0	0
Interest income		$ 0	$ 0	$ 0