Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets - Schedule of Amortization Expense of Intangible Assets in Cost of Revenue and Operating Expense (Detail)

v3.19.3
Goodwill and Intangible Assets - Schedule of Amortization Expense of Intangible Assets in Cost of Revenue and Operating Expense (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2019
Oct. 31, 2018
Goodwill And Intangible Assets [Line Items]        
Amortization expense $ 295 $ 794 $ 893 $ 1,198
Cost of Revenue [Member]        
Goodwill And Intangible Assets [Line Items]        
Amortization expense   356   534
Selling and Marketing [Member]        
Goodwill And Intangible Assets [Line Items]        
Amortization expense 185 380 555 525
Research and Development [Member]        
Goodwill And Intangible Assets [Line Items]        
Amortization expense $ 110 $ 58 $ 338 $ 139