Annual report pursuant to Section 13 and 15(d)

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

v3.7.0.1
Segment Information, Significant Customers and Geographic Information - Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area (Detail) - USD ($)
$ in Thousands
12 Months Ended
Jan. 31, 2017
Jan. 31, 2016
Jan. 31, 2015
Segment Reporting Information [Line Items]      
Total revenues $ 83,795 $ 106,992 $ 115,435
North America [Member]      
Segment Reporting Information [Line Items]      
Total revenues 37,570 58,113 64,755
Europe and Middle East [Member]      
Segment Reporting Information [Line Items]      
Total revenues 38,169 42,201 39,387
Latin America [Member]      
Segment Reporting Information [Line Items]      
Total revenues 5,764 4,707 6,829
Asia Pacific [Member]      
Segment Reporting Information [Line Items]      
Total revenues $ 2,292 $ 1,971 $ 4,464
Customer Concentration Risk [Member] | Total Revenue [Member]      
Segment Reporting Information [Line Items]      
% of total revenues 10.00% 10.00% 10.00%
Customer Concentration Risk [Member] | Total Revenue [Member] | North America [Member]      
Segment Reporting Information [Line Items]      
% of total revenues 45.00% 55.00% 56.00%
Customer Concentration Risk [Member] | Total Revenue [Member] | Europe and Middle East [Member]      
Segment Reporting Information [Line Items]      
% of total revenues 45.00% 39.00% 34.00%
Customer Concentration Risk [Member] | Total Revenue [Member] | Latin America [Member]      
Segment Reporting Information [Line Items]      
% of total revenues 7.00% 4.00% 6.00%
Customer Concentration Risk [Member] | Total Revenue [Member] | Asia Pacific [Member]      
Segment Reporting Information [Line Items]      
% of total revenues 3.00% 2.00% 4.00%