Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.2
Disaggregated Revenue and Geographic Information - Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area (Parenthetical) (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 31, 2021
Jul. 31, 2020
Jul. 31, 2021
Jul. 31, 2020
Segment Reporting Information [Line Items]        
Total revenues $ 6,540 $ 4,995 $ 11,592 $ 11,910
United States Revenue [Member]        
Segment Reporting Information [Line Items]        
Total revenues $ 3,697 $ 1,662 $ 5,895 $ 4,005
Total Revenue [Member] | Customer Concentration Risk [Member] | United States Revenue [Member]        
Segment Reporting Information [Line Items]        
% of total revenue 57.00% 33.00% 51.00% 34.00%