Note 14 - Business Segments - Business Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2025	Dec. 31, 2024	Jun. 30, 2025
Revenues	$ 15,649	$ 8,619	$ 31,163	$ 18,418
Gross Profit / (Loss)	2,499	2,218	5,084	4,540
Operating Income / (Loss)	97	(3)	143	130
Total Assets	45,729	39,800	45,729	39,800	$ 41,068
Depreciation and Amortization	441	711	973	1,422
Capital Expenditures	286	119	332	252
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Revenues	8	9	18	15
Gross Profit / (Loss)	(9)	(9)	(16)	(20)
Operating Income / (Loss)	(89)	(77)	(161)	(114)
Total Assets	8,121	9,182	8,121	9,182
Depreciation and Amortization	18	17	35	34
Capital Expenditures	0	0	0	0
Semiconductor Back-end Solutions [Member] | Operating Segments [Member]
Revenues	12,357	5,809	23,809	12,688
Gross Profit / (Loss)	1,777	1,742	3,487	3,536
Operating Income / (Loss)	168	97	88	274
Total Assets	30,622	24,348	30,622	24,348
Depreciation and Amortization	363	639	818	1,275
Capital Expenditures	262	119	300	252
Industrial Electronics [Member] | Operating Segments [Member]
Revenues	3,284	2,801	7,336	5,715
Gross Profit / (Loss)	731	485	1,613	1,024
Operating Income / (Loss)	18	(23)	216	(30)
Total Assets	6,986	6,270	6,986	6,270
Depreciation and Amortization	60	55	120	113
Capital Expenditures	$ 24	$ 0	$ 32	$ 0