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Warranty (Details Textual) (USD $)
3 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Warranty (Textual) [Abstract]        
Warranty expense $ 157,000 $ 228,000    
Warranty reserves related to continuing operations 585,000 678,000 526,000 688,000
Warranty reserves related to discontinued operations 13,000     35,000
Total warranty expense from discontinued operations $ 8,000 $ 15,000