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)

v3.10.0.1
Segment Information, Significant Customers and Geographic Information - Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 31, 2018
Oct. 31, 2017
Oct. 31, 2018
Oct. 31, 2017
Segment Reporting Information [Line Items]        
Total revenues $ 18,611 $ 23,430 $ 45,447 $ 57,322
North America [Member]        
Segment Reporting Information [Line Items]        
Total revenues $ 10,534 $ 6,931 $ 23,580 $ 23,577
North America [Member] | Customer Concentration Risk [Member] | Total Revenues [Member]        
Segment Reporting Information [Line Items]        
% of total revenues 56.00% 29.00% 52.00% 41.00%
Europe and Middle East [Member]        
Segment Reporting Information [Line Items]        
Total revenues $ 3,876 $ 14,560 $ 13,757 $ 28,203
Europe and Middle East [Member] | Customer Concentration Risk [Member] | Total Revenues [Member]        
Segment Reporting Information [Line Items]        
% of total revenues 21.00% 62.00% 30.00% 49.00%
Latin America [Member]        
Segment Reporting Information [Line Items]        
Total revenues $ 3,863 $ 1,545 $ 6,934 $ 4,408
Latin America [Member] | Customer Concentration Risk [Member] | Total Revenues [Member]        
Segment Reporting Information [Line Items]        
% of total revenues 21.00% 7.00% 15.00% 8.00%
Asia Pacific [Member]        
Segment Reporting Information [Line Items]        
Total revenues $ 338 $ 394 $ 1,176 $ 1,134
Asia Pacific [Member] | Customer Concentration Risk [Member] | Total Revenues [Member]        
Segment Reporting Information [Line Items]        
% of total revenues 2.00% 2.00% 3.00% 2.00%