Quarterly report pursuant to Section 13 or 15(d)

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

v3.4.0.3
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
Apr. 30, 2016
Apr. 30, 2015
Segment Reporting Information [Line Items]    
Total revenues $ 21,570 $ 23,177
North America [Member]    
Segment Reporting Information [Line Items]    
Total revenues 10,671 13,779
Europe and Middle East [Member]    
Segment Reporting Information [Line Items]    
Total revenues 9,141 7,566
Latin America [Member]    
Segment Reporting Information [Line Items]    
Total revenues 1,185 1,098
Asia Pacific [Member]    
Segment Reporting Information [Line Items]    
Total revenues $ 573 $ 734
Customer Concentration Risk [Member] | Total Revenue [Member] | North America [Member]    
Segment Reporting Information [Line Items]    
% of total revenues 50.00% 59.00%
Customer Concentration Risk [Member] | Total Revenue [Member] | Europe and Middle East [Member]    
Segment Reporting Information [Line Items]    
% of total revenues 42.00% 33.00%
Customer Concentration Risk [Member] | Total Revenue [Member] | Latin America [Member]    
Segment Reporting Information [Line Items]    
% of total revenues 5.00% 5.00%
Customer Concentration Risk [Member] | Total Revenue [Member] | Asia Pacific [Member]    
Segment Reporting Information [Line Items]    
% of total revenues 3.00% 3.00%