Quarterly report pursuant to Section 13 or 15(d)

Significant Customers and Geographic Information - Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area (Detail)

v2.4.0.8
Significant Customers and Geographic Information - Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Oct. 31, 2013
Oct. 31, 2012
Oct. 31, 2013
Oct. 31, 2012
Segment Reporting Information [Line Items]        
Revenue $ 37,771 $ 39,249 $ 110,703 $ 112,613
North America [Member]
       
Segment Reporting Information [Line Items]        
Revenue 21,508 25,213 61,068 73,100
Europe and Middle East [Member]
       
Segment Reporting Information [Line Items]        
Revenue 13,324 10,594 39,663 30,077
Latin America [Member]
       
Segment Reporting Information [Line Items]        
Revenue 2,629 2,948 7,724 8,232
Asia Pacific and Other International Locations [Member]
       
Segment Reporting Information [Line Items]        
Revenue 310 494 2,248 1,204
United States Revenue [Member]
       
Segment Reporting Information [Line Items]        
Revenue $ 18,461 $ 22,340 $ 54,099 $ 67,524
Sales [Member] | North America [Member]
       
Segment Reporting Information [Line Items]        
% of total revenue 57.00% 64.00% 55.00% 65.00%
Sales [Member] | Europe and Middle East [Member]
       
Segment Reporting Information [Line Items]        
% of total revenue 35.00% 27.00% 36.00% 27.00%
Sales [Member] | Latin America [Member]
       
Segment Reporting Information [Line Items]        
% of total revenue 7.00% 8.00% 7.00% 7.00%
Sales [Member] | Asia Pacific and Other International Locations [Member]
       
Segment Reporting Information [Line Items]        
% of total revenue 1.00% 1.00% 2.00% 1.00%
Sales [Member] | United States Revenue [Member]
       
Segment Reporting Information [Line Items]        
% of total revenue 48.90% 56.90% 48.90% 60.00%