Quarterly report pursuant to Section 13 or 15(d)

Revenues from Contracts with Customers - Schedule of Revenue Disaggregated by Revenue Stream (Detail)

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Revenues from Contracts with Customers - Schedule of Revenue Disaggregated by Revenue Stream (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Oct. 31, 2020
Oct. 31, 2019
Oct. 31, 2020
Oct. 31, 2019
Disaggregation Of Revenue [Line Items]        
Total revenue $ 4,966 $ 20,544 $ 16,876 $ 47,841
Product [Member]        
Disaggregation Of Revenue [Line Items]        
Total revenue 1,048 13,524 5,212 26,671
Professional Services [Member]        
Disaggregation Of Revenue [Line Items]        
Total revenue 488 1,124 1,112 5,050
Maintenance [Member]        
Disaggregation Of Revenue [Line Items]        
Total revenue $ 3,430 $ 5,896 $ 10,552 $ 16,120