Quarterly report pursuant to Section 13 or 15(d)

Nature of Business and Basis of Presentation - Reclassification Reflected in Current Statements of Operations and Comprehensive Income (Loss) (Detail)

v2.4.0.8
Nature of Business and Basis of Presentation - Reclassification Reflected in Current Statements of Operations and Comprehensive Income (Loss) (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Oct. 31, 2012
Oct. 31, 2012
Basis of Presentation [Line Items]    
Prior period reclassification adjustment      
Cost of Revenue - Product [Member]
   
Basis of Presentation [Line Items]    
Prior period reclassification adjustment (50) (162)
Cost of Revenue - Service [Member]
   
Basis of Presentation [Line Items]    
Prior period reclassification adjustment (250) (737)
Research and Development Expenses [Member]
   
Basis of Presentation [Line Items]    
Prior period reclassification adjustment (221) (593)
Selling and Marketing Expenses [Member]
   
Basis of Presentation [Line Items]    
Prior period reclassification adjustment (46) (127)
General and Administrative Expenses [Member]
   
Basis of Presentation [Line Items]    
Prior period reclassification adjustment $ 567 $ 1,619