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Product Warranty
3 Months Ended
Jun. 30, 2011
Product Warranty  
Product Warranty

8.        Product Warranty

The Company generally provides a one to three year warranty on its products, commencing upon installation. A provision is recorded upon revenue recognition to cost of revenues for estimated warranty expense based on historical experience.

Product warranty activity was as follows (in thousands):

 

 

 
 

Three months ended

                 June 30,  
     
  2011 2010
     
Balance at beginning of period  $7,907 $6,431
Accruals for warranties during the period  (405) 2,305
Settlements during the period  (168) (2,361)
Balance at end of period  $7,334      $6,375