Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
Segment Information 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, 2020
Jul. 31, 2019
Jul. 31, 2020
Jul. 31, 2019
Segment Reporting Information [Line Items]        
Total revenue $ 4,995 $ 18,812 $ 11,910 $ 27,297
North America [Member]        
Segment Reporting Information [Line Items]        
Total revenue 2,318 11,567 5,896 15,656
Europe and Middle East [Member]        
Segment Reporting Information [Line Items]        
Total revenue 2,150 2,724 4,132 5,694
Latin America [Member]        
Segment Reporting Information [Line Items]        
Total revenue 343 4,132 1,476 5,179
Asia Pacific [Member]        
Segment Reporting Information [Line Items]        
Total revenue $ 184 $ 389 $ 406 $ 768
Customer Concentration Risk [Member] | Total Revenue [Member] | North America [Member]        
Segment Reporting Information [Line Items]        
% of total revenues 46.00% 62.00% 50.00% 57.00%
Customer Concentration Risk [Member] | Total Revenue [Member] | Europe and Middle East [Member]        
Segment Reporting Information [Line Items]        
% of total revenues 43.00% 14.00% 35.00% 21.00%
Customer Concentration Risk [Member] | Total Revenue [Member] | Latin America [Member]        
Segment Reporting Information [Line Items]        
% of total revenues 7.00% 22.00% 12.00% 19.00%
Customer Concentration Risk [Member] | Total Revenue [Member] | Asia Pacific [Member]        
Segment Reporting Information [Line Items]        
% of total revenues 4.00% 2.00% 3.00% 3.00%