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Product Warranties
 9 Months Ended
Sep. 30, 2012
Product Warranties [Abstract]  
Product Warranties

8. Product Warranties

The Company generally offers a two-year warranty for all of its products. The Company provides for the estimated cost of product warranties at the time product revenue is recognized. Factors that affect the Company’s warranty reserves include the number of units sold, historical and anticipated rates of warranty returns, and the cost per return. The Company assesses the adequacy of the warranty reserves and adjusts the amounts as necessary. Warranty obligations are included in “Accrued expenses” in the accompanying Condensed Consolidated Balance Sheets.

Product warranty activity for the three and nine months ended September 30, was as follows (in thousands):

 

                                 
    Three Months Ended
September 30,		     Nine Months Ended
September 30,		  
    2012     2011     2012     2011  

Balance at the beginning of the period

   $ 461     $ 1,299     $ 572     $ 649  

Accruals for warranties for products sold in the period

     161       282       379       1,316  

Fulfillment of warranty obligations

     (133 )      (616 )      (430 )      (1,025 ) 

Revisions of estimated obligations

     (8 )      (369 )      (40 )      (344 ) 
   

 

 

    

 

 

    

 

 

    

 

 

  

Balance at the end of the period

   $ 481     $ 596     $ 481     $ 596