Quarterly report pursuant to Section 13 or 15(d)

Revenue from Contracts with Customers - Schedule of Impact of Consolidated Statements of Cash Flows of Adopting ASC 606 (Detail)

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Revenue from Contracts with Customers - Schedule of Impact of Consolidated Statements of Cash Flows of Adopting ASC 606 (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Apr. 30, 2018
Apr. 30, 2017
Cash flows from operating activities:    
Net loss $ (5,471) $ (5,371)
Prepaid expenses and other assets 224 403
Deferred revenues (2,778) (3,310)
Other operating activities 2,356 (14)
Net cash used in operating activities (3,927) $ (917)
Under ASC 605 [Member] | ASU 2014-09 [Member]    
Cash flows from operating activities:    
Net loss (7,864)  
Prepaid expenses and other assets 590  
Deferred revenues 1,568  
Other operating activities 37  
Net cash used in operating activities (3,927)  
Adjustment [Member] | ASU 2014-09 [Member]    
Cash flows from operating activities:    
Net loss 2,393  
Prepaid expenses and other assets (366)  
Deferred revenues (4,346)  
Other operating activities $ 2,319