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Warranty Accrual (Tables)
12 Months Ended
Jun. 30, 2012
Warranty Accrual [Abstract]  
Accrual for Warranty Costs
                 
    2012     2011  

Balance at beginning of year

  $ 688,000     $ 676,000  

Accruals during the year

    486,000       627,000  

Changes in estimates of prior period accruals

    290,000       64,000  

Warranty expenditures

    (938,000     (679,000
   

 

 

   

 

 

 
     

Balance at end of year

  $ 526,000     $ 688,000