CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Net sales	$ 5,494	$ 6,618	$ 16,217	$ 16,346
Cost of sales	3,518	4,156	10,663	11,150
Gross profit	1,976	2,462	5,554	5,196
Operating expenses:
Selling expenses	83	132	257	439
General and administrative expenses	701	725	1,781	1,894
Impairment of goodwill and long-lived assets			230	113
Research and development costs	560	257	1,445	839
Total operating expenses	1,344	1,114	3,713	3,285
Operating income	632	1,348	1,841	1,911
Interest expense	(2)	(3)	(6)	(10)
Interest income	73	8	166	19
Gain from disposal of equipment			16	3
Income from continuing operations before income taxes	703	1,353	2,017	1,923
Income tax (expense) benefit	(223)	(650)	(564)	2,202
Income from continuing operations	480	703	1,453	4,125
Income from discontinued operations, net of income taxes		185		243
Net income	480	888	1,453	4,368
Other comprehensive income, net of tax:
Unrealized gain (loss) from marketable equity investments, net of income taxes	59	6	(86)
Comprehensive income	$ 539	$ 894	$ 1,367	$ 4,368
Basic net income per share:
Income from continuing operations	$ 0.11	$ 0.17	$ 0.34	$ 1.02
Income from discontinued operations		0.05		0.06
Net income	0.11	0.22	0.34	1.08
Diluted net income per share:
Income from continuing operations	0.11	0.17	0.34	1.01
Income from discontinued operations		0.05		0.06
Net income	$ 0.11	$ 0.22	$ 0.34	$ 1.07
Weighted average common shares outstanding:
Basic	4,363	4,021	4,290	4,047
Diluted	4,403	4,055	4,330	4,085
Common shares outstanding	4,361	4,014	4,361	4,014