Annual report pursuant to Section 13 and 15(d)

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

v3.19.1
Segment 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, 2019
Jan. 31, 2018
Segment Reporting Information [Line Items]    
Total revenue $ 62,402 $ 80,267
Customer Concentration Risk [Member] | Total Revenue [Member]    
Segment Reporting Information [Line Items]    
% of total revenues   37.00%
North America [Member]    
Segment Reporting Information [Line Items]    
Total revenue $ 30,002 $ 32,409
North America [Member] | Customer Concentration Risk [Member] | Total Revenue [Member]    
Segment Reporting Information [Line Items]    
% of total revenues 48.00% 40.00%
Europe and Middle East [Member]    
Segment Reporting Information [Line Items]    
Total revenue $ 21,990 $ 39,177
Europe and Middle East [Member] | Customer Concentration Risk [Member] | Total Revenue [Member]    
Segment Reporting Information [Line Items]    
% of total revenues 35.00% 49.00%
Latin America [Member]    
Segment Reporting Information [Line Items]    
Total revenue $ 9,068 $ 7,379
Latin America [Member] | Customer Concentration Risk [Member] | Total Revenue [Member]    
Segment Reporting Information [Line Items]    
% of total revenues 15.00% 9.00%
Asia Pacific [Member]    
Segment Reporting Information [Line Items]    
Total revenue $ 1,342 $ 1,302
Asia Pacific [Member] | Customer Concentration Risk [Member] | Total Revenue [Member]    
Segment Reporting Information [Line Items]    
% of total revenues 2.00% 2.00%