CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (unaudited) (USD $)	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Income Statement [Abstract]
Net sales	$ 2,555,000	$ 3,461,000
Cost of sales	1,610,000	2,225,000
Gross profit	945,000	1,236,000
Operating expenses:
Selling expenses	92,000	274,000
General and administrative expenses	457,000	608,000
Research and development costs	375,000	406,000
Total operating expenses	924,000	1,288,000
Income (loss) from continuing operations before items below	21,000	(52,000)
Other income (expense):
Interest expense	(2,000)	(6,000)
Total other expense	(2,000)	(6,000)
Income (loss) from continuing operations before provision for income taxes	19,000	(58,000)
Provision for income taxes	1,000	1,000
Income (loss) from continuing operations	18,000	(59,000)
Income from discontinued operations, net of provision for income taxes of nil in 2013 and $47,000 in 2012	194,000	42,000
Net income (loss)	212,000	(17,000)
Other comprehensive income, net of tax
Unrealized gain from marketable equity investments	56,000
Total other comprehensive income	56,000
Comprehensive income (loss)	$ 268,000	$ (17,000)
Income (loss) from continuing operations
Basic (in dollars per share)	$ 0	$ (0.02)
Diluted (in dollars per share)	$ 0	$ (0.02)
Income from discontinued operations
Basic (in dollars per share)	$ 0.06	$ 0.01
Diluted (in dollars per share)	$ 0.06	$ 0.01
Net income (loss)
Basic (in dollars per share)	$ 0.06	$ (0.01)
Diluted (in dollars per share)	$ 0.06	$ (0.01)
Weighted average shares outstanding - basic (in shares)	3,344,697	3,279,578
Weighted average shares outstanding - diluted (in shares)	3,353,447	3,279,578