Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
Revenues from Contracts with Customers - Schedule of Revenue Disaggregated by Revenue Stream (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Apr. 30, 2019
Apr. 30, 2018
Disaggregation Of Revenue [Line Items]    
Total revenue $ 8,485 $ 14,935
Product [Member]    
Disaggregation Of Revenue [Line Items]    
Total revenue 1,179 3,091
Professional Services [Member]    
Disaggregation Of Revenue [Line Items]    
Total revenue 2,081 4,637
Maintenance - First Year [Member]    
Disaggregation Of Revenue [Line Items]    
Total revenue 575 658
Maintenance - Renewal [Member]    
Disaggregation Of Revenue [Line Items]    
Total revenue $ 4,650 $ 6,549