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Warranty Accrual (Tables)
3 Months Ended
Apr. 30, 2013
Commitments and Contingencies Disclosure [Abstract]  
Warranty claim activity
The following is a summary of the Company’s warranty claim activity for the three months ended April 30, 2013 and 2012 (in thousands):
 
 
Three Months Ended
 
4/30/2013
 
4/30/2012
 
(In thousands)
Beginning accrued warranty balance
$
1,000

 
$
1,400

Provision
141

 
111

Costs incurred
(141
)
 
(111
)
Ending accrued warranty balance
$
1,000

 
$
1,400