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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)

v3.2.0.727
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 6 Months Ended
Jul. 31, 2015
Jul. 31, 2014
Jul. 31, 2015
Jul. 31, 2014
Segment Reporting Information [Line Items]        
Total revenues $ 27,871 $ 29,849 $ 51,048 $ 54,186
North America [Member]        
Segment Reporting Information [Line Items]        
Total revenues 16,010 18,855 29,789 33,497
Europe and Middle East [Member]        
Segment Reporting Information [Line Items]        
Total revenues 10,090 9,001 17,656 16,698
Latin America [Member]        
Segment Reporting Information [Line Items]        
Total revenues 1,354 1,529 2,452 3,178
Asia Pacific and Other International Locations [Member]        
Segment Reporting Information [Line Items]        
Total revenues $ 417 $ 464 $ 1,151 $ 813
Customer Concentration Risk [Member] | Total Revenue [Member] | North America [Member]        
Segment Reporting Information [Line Items]        
% of total revenues 58.00% 63.00% 58.00% 62.00%
Customer Concentration Risk [Member] | Total Revenue [Member] | Europe and Middle East [Member]        
Segment Reporting Information [Line Items]        
% of total revenues 36.00% 30.00% 35.00% 31.00%
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% 2.00% 2.00% 1.00%