CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Income Statement [Abstract]
Net sales	$ 17,414	$ 14,293	$ 49,099	$ 38,819
Cost of sales	11,616	10,291	33,080	28,357
Gross profit	5,798	4,002	16,019	10,462
Operating expenses:
Selling expenses	113	17	211	79
General and administrative expenses	1,098	1,012	3,732	3,208
Research and development costs	947	760	2,731	2,353
Total operating expenses	2,158	1,789	6,674	5,640
Operating income	3,640	2,213	9,345	4,822
Interest expense	(246)	(138)	(602)	(409)
Unrealized gain (loss) on marketable equity investments	550	(1,192)	1,060	(3,785)
Interest and other income	15	30	61	76
Gain on sale of investments	595		595
Income before income taxes	4,554	913	10,459	704
Income tax expense	1,279	258	2,678	164
Net income	$ 3,275	$ 655	$ 7,781	$ 540
Basic net income per share:
Net income	$ 1.00	$ 0.19	$ 2.36	$ 0.15
Diluted net income per share:
Net income	$ 0.98	$ 0.19	$ 2.31	$ 0.15
Weighted average common shares outstanding:
Basic	3,261,043	3,451,423	3,296,744	3,531,249
Diluted	3,337,312	3,523,823	3,366,099	3,603,649
Common shares outstanding	3,261,043	3,451,423	3,261,043	3,451,423