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

v3.3.1.900
Segment Information, Significant Customers and Geographic Information - Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Oct. 31, 2015
Oct. 31, 2014
Oct. 31, 2015
Oct. 31, 2014
Segment Reporting Information [Line Items]        
Total revenues $ 28,747 $ 29,970 $ 79,795 $ 84,156
North America [Member]        
Segment Reporting Information [Line Items]        
Total revenues 14,659 15,673 44,447 49,170
Europe and Middle East [Member]        
Segment Reporting Information [Line Items]        
Total revenues 12,322 10,272 29,979 26,970
Latin America [Member]        
Segment Reporting Information [Line Items]        
Total revenues 1,433 1,475 3,884 4,653
Asia Pacific and Other International Locations [Member]        
Segment Reporting Information [Line Items]        
Total revenues $ 333 $ 2,550 $ 1,485 $ 3,363
Customer Concentration Risk [Member] | Total Revenue [Member] | North America [Member]        
Segment Reporting Information [Line Items]        
% of total revenues 51.00% 52.00% 56.00% 58.00%
Customer Concentration Risk [Member] | Total Revenue [Member] | Europe and Middle East [Member]        
Segment Reporting Information [Line Items]        
% of total revenues 43.00% 34.00% 37.00% 32.00%
Customer Concentration Risk [Member] | Total Revenue [Member] | Latin America [Member]        
Segment Reporting Information [Line Items]        
% of total revenues 5.00% 5.00% 5.00% 6.00%
Customer Concentration Risk [Member] | Total Revenue [Member] | Asia Pacific and Other International Locations [Member]        
Segment Reporting Information [Line Items]        
% of total revenues 1.00% 9.00% 2.00% 4.00%