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 6 Months Ended
Jul. 31, 2020
Jul. 31, 2019
Jul. 31, 2020
Jul. 31, 2019
Disaggregation Of Revenue [Line Items]        
Total revenue $ 4,995 $ 18,812 $ 11,910 $ 27,297
Product [Member]        
Disaggregation Of Revenue [Line Items]        
Total revenue 1,066 11,968 4,164 13,147
Professional Services [Member]        
Disaggregation Of Revenue [Line Items]        
Total revenue 360 1,845 624 3,926
Maintenance [Member]        
Disaggregation Of Revenue [Line Items]        
Total revenue $ 3,569 $ 4,999 $ 7,122 $ 10,224