Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies - Additional Information (Detail)

v2.4.0.8
Significant Accounting Policies - Additional Information (Detail)
 3 Months Ended
Apr. 30, 2014
Significant Accounting Policies [Line Items]  
Minimum period warranty of product 1 year
Minimum [Member]
  
Significant Accounting Policies [Line Items]  
Support agreements 12 months
Maximum [Member]
  
Significant Accounting Policies [Line Items]  
Support agreements 36 months