CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Net sales	$ 21,943	$ 19,189
Cost of sales	14,757	14,271
Gross profit	7,186	4,918
Operating expenses:
Selling expenses	585	780
General and administrative expenses	2,529	1,882
Impairment of goodwill and intangible assets	113	245
Research and development costs	1,225	1,204
Total operating expenses	4,452	4,111
Operating income	2,734	807
Other income (expense):
Interest and dividend income	27
Gain from sale of Investment in Ramsey Property		340
Gain from disposal of equipment	3	18
Interest expense	(12)	(37)
Total other income	18	321
Income from continuing operations before income taxes	2,752	1,128
Income tax (expense) benefit	2,089	(25)
Net income from continuing operations	4,841	1,103
Income (loss) from discontinued operations, net of income taxes	243	(281)
Net income	5,084	822
Other comprehensive income, net of tax:
Unrealized gain from marketable equity investments, net of income taxes	33
Comprehensive income	$ 5,117	$ 822
Basic income (loss) per share:
Net income from continuing operations	$ 1.20	$ 0.27
Income (loss) from discontinued operations	0.06	(0.07)
Net income	1.26	0.2
Diluted income (loss) per share:
Net income from continuing operations	1.19	0.27
Income (loss) from discontinued operations	0.06	(0.07)
Net income	$ 1.25	$ 0.2
Weighted average common shares outstanding:
Basic	4,040,308	4,141,353
Diluted	4,077,575	4,173,556