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Warranty (Tables)
3 Months Ended
Sep. 30, 2012
Warranty [Abstract]  
Accrual for Warranty Costs
                 
    Three months Ended September 30,  
    2012     2011  

Balances, beginning of period

  $ 526,000     $ 688,000  

Accruals during the period

    149,000       137,000  

Changes in estimates of prior period accruals

    8,000       91,000  

Warranty expenditures

    (98,000     (238,000
   

 

 

   

 

 

 

Balances, end of period

  $ 585,000     $ 678,000