Quarterly report pursuant to Section 13 or 15(d)

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

v3.10.0.1
Revenue from Contracts with Customers - Schedule of Revenue Disaggregated by Revenue Stream (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jul. 31, 2018
Jul. 31, 2017
Jul. 31, 2018
Jul. 31, 2017
Disaggregation Of Revenue [Line Items]        
Total revenues $ 11,901 $ 17,225 $ 26,836 $ 33,892
Product [Member]        
Disaggregation Of Revenue [Line Items]        
Total revenues 1,462 $ 5,039 4,553 $ 7,788
Professional Services [Member]        
Disaggregation Of Revenue [Line Items]        
Total revenues 3,426   8,063  
Maintenance - First Year [Member]        
Disaggregation Of Revenue [Line Items]        
Total revenues 460   1,118  
Maintenance - Renewal [Member]        
Disaggregation Of Revenue [Line Items]        
Total revenues $ 6,553   $ 13,102