Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.2
Revenues from Contracts with Customers - Schedule of Revenue Disaggregated by Revenue Stream (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jul. 31, 2019
Jul. 31, 2018
Jul. 31, 2019
Jul. 31, 2018
Disaggregation Of Revenue [Line Items]        
Total revenue $ 18,812 $ 11,901 $ 27,297 $ 26,836
Product [Member]        
Disaggregation Of Revenue [Line Items]        
Total revenue 11,968 1,462 13,147 4,553
Professional Services [Member]        
Disaggregation Of Revenue [Line Items]        
Total revenue 1,845 3,426 3,926 8,063
Maintenance - First Year [Member]        
Disaggregation Of Revenue [Line Items]        
Total revenue 704 460 1,279 1,118
Maintenance - Renewal [Member]        
Disaggregation Of Revenue [Line Items]        
Total revenue $ 4,295 $ 6,553 $ 8,945 $ 13,102