CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (unaudited) (USD $)	3 Months Ended		6 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Net sales	$ 2,640,000	$ 3,007,000	$ 5,194,000	$ 6,468,000
Cost of sales	2,091,000	1,974,000	3,700,000	4,199,000
Gross profit	549,000	1,033,000	1,494,000	2,269,000
Operating expenses:
Selling expenses	139,000	322,000	231,000	596,000
General and administrative expenses	422,000	627,000	878,000	1,234,000
Research and development costs	364,000	464,000	740,000	870,000
Total operating expenses	925,000	1,413,000	1,849,000	2,700,000
Loss from continuing operations before items below	(376,000)	(380,000)	(355,000)	(431,000)
Other expense (income):
Interest expense	2,000		4,000	(6,000)
Interest income	(10,000)		(10,000)
Loss from disposal of equipment	6,000		6,000
Total other expense (income)	(2,000)			(6,000)
Loss from continuing operations before benefit from income taxes	(374,000)	(380,000)	(355,000)	(437,000)
Benefit from income taxes	(36,000)	(16,000)	(35,000)	(19,000)
Loss from continuing operations	(338,000)	(364,000)	(320,000)	(418,000)
Income from discontinued operations, net of provision for income taxes		16,000	194,000	53,000
Net loss	(338,000)	(348,000)	(126,000)	(365,000)
Other comprehensive income, net of tax
Unrealized gain from marketable equity investments	148,000		204,000
Total other comprehensive income	148,000		204,000
Comprehensive loss	$ (190,000)	$ (348,000)	$ 78,000	$ (365,000)
Loss from continuing operations
Basic (in dollars per share)	$ (0.10)	$ (0.11)	$ (0.10)	$ (0.13)
Diluted (in dollars per share)	$ (0.10)	$ (0.11)	$ (0.10)	$ (0.13)
Income from discontinued operations
Basic (in dollars per share)			$ 0.06	$ 0.02
Diluted (in dollars per share)			$ 0.06	$ 0.02
Net loss
Basic (in dollars per share)	$ (0.10)	$ (0.11)	$ (0.04)	$ (0.11)
Diluted (in dollars per share)	$ (0.10)	$ (0.11)	$ (0.04)	$ (0.11)
Weighted average shares outstanding - basic (in shares)	3,343,499	3,319,180	3,344,098	3,299,379
Weighted average shares outstanding - diluted (in shares)	3,343,499	3,319,180	3,344,098	3,299,379