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Warranty Accrual (Tables)
 6 Months Ended
Jul. 31, 2012
Warranty Accrual [Abstract]  
Warranty claim activity

The following is a summary of the Company’s warranty claim activity for the three and six months ended July 31, 2012 and 2011 (in thousands):

 

                                 
    Three Months Ended     Six Months Ended  
    7/31/2012     7/31/2011     7/31/2012     7/31/2011  
    (In thousands)  

Beginning accrued warranty balance

   $ 1,400     $ 2,150     $ 1,400     $ 2,300  

Provision

     88       276       199       348  

Costs incurred

     (188 )      (626 )      (299 )      (848 ) 
   

 

 

    

 

 

    

 

 

    

 

 

  

Ending accrued warranty balance

   $ 1,300     $ 1,800     $ 1,300     $ 1,800