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Consolidated Statements of Operations (USD $)
 12 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Consolidated Statements of Operations [Abstract]    
Net sales $ 17,257,000 $ 24,060,000
Cost of sales 11,841,000 13,919,000
Gross profit 5,416,000 10,141,000
Operating expenses:    
Selling expenses 1,531,000 1,600,000
General and administrative expenses 3,182,000 3,174,000
Research and development costs 2,068,000 1,889,000
Total operating expenses 6,781,000 6,663,000
Income (loss) from continuing operations before items below (1,365,000) 3,478,000
Other expense:    
Interest expense 36,000 148,000
Total other expense 36,000 148,000
Income (loss) from continuing operations before provision for income taxes (1,401,000) 3,330,000
Provision for (benefit from) income taxes (441,000) 530,000
Income (loss) from continuing operations (960,000) 2,800,000
Income (loss) from discontinued operations, net of (benefit) from income taxes of $(146,000) and $(74,000) in 2012 and 2011, respectively 84,000 (160,000)
Net income (loss) $ (876,000) $ 2,640,000
Income (loss) from continuing operations    
Basic $ (0.29) $ 0.86
Diluted $ (0.29) $ 0.85
Income (loss) from discontinued operations    
Basic $ 0.02 $ (0.05)
Diluted $ 0.02 $ (0.05)
Net income (loss)    
Basic $ (0.27) $ 0.81
Diluted $ (0.27) $ 0.80
Weighted average shares outstanding - basic 3,272,350 3,264,936
Weighted average shares outstanding - diluted 3,272,350 3,287,415