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Condensed Consolidated Statements of Operations (Unaudited) (USD $)
 3 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Condensed Consolidated Statements of Operations [Abstract]    
Net sales $ 3,461,000 $ 5,045,000
Cost of sales 2,225,000 2,937,000
Gross profit 1,236,000 2,108,000
Operating expenses:    
Selling expenses 274,000 374,000
General and administrative expenses 608,000 816,000
Research and development costs 406,000 561,000
Total operating expenses 1,288,000 1,751,000
Income (loss) from continuing operations before items below (52,000) 357,000
Other expense:    
Interest expense (6,000) (10,000)
Total other expense (6,000) (10,000)
Income (loss) from continuing operations before provision for income taxes (58,000) 347,000
Provision for income taxes 1,000 1,000
Income (loss) from continuing operations (59,000) 346,000
Income from discontinued operations, net of provision for income taxes of $0 in 2012 and 2011 42,000 100,000
Net income (loss) $ (17,000) $ 446,000
Income (loss) from continuing operations    
Basic $ (0.02) $ 0.11
Diluted $ (0.02) $ 0.11
Income from discontinued operations    
Basic $ 0.01 $ 0.03
Diluted $ 0.01 $ 0.03
Net income (loss)    
Basic $ (0.01) $ 0.14
Diluted $ (0.01) $ 0.14
Weighted average shares outstanding - basic 3,279,578 3,272,350
Weighted average shares outstanding - diluted 3,279,578 3,280,045