Annual report pursuant to Section 13 and 15(d)

Severance and Other Restructuring Costs - Additional Information (Detail)

v2.4.0.8
Severance and Other Restructuring Costs - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended 0 Months Ended
Oct. 31, 2012
Jan. 31, 2014
Employees
Jan. 31, 2013
Jan. 31, 2013
Senior Executive [Member]
Employees
May 02, 2012
Chief Executive Officer [Member]
Restructuring Cost and Reserve [Line Items]          
Severance and restructuring charges   $ 0.9 $ 3.1    
Number of employees terminated   20   2  
Severance costs 0.2   1.9    
Other restructuring costs     1.2    
Leasehold improvement charge     0.8    
Non recurring expenses         $ 0.2