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 6 Months Ended
Jul. 31, 2012
Jul. 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 (58) (112)
Cost of Revenue Service [Member]
   
Basis Of Presentation [Line Items]    
Prior period reclassification adjustment (248) (487)
Research and Development Expenses [Member]
   
Basis Of Presentation [Line Items]    
Prior period reclassification adjustment (190) (372)
Selling and Marketing Expenses [Member]
   
Basis Of Presentation [Line Items]    
Prior period reclassification adjustment (41) (81)
General and Administrative Expenses [Member]
   
Basis Of Presentation [Line Items]    
Prior period reclassification adjustment $ 537 $ 1,052