Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets -Schedule of Finite-Life Intangible Assets, Amortization Expense (Detail)

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Goodwill and Intangible Assets -Schedule of Finite-Life Intangible Assets, Amortization Expense (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 31, 2020
Jan. 31, 2019
Goodwill And Intangible Assets [Line Items]    
Amortization expense $ 1,163 $ 896
Cost of Revenue [Member]    
Goodwill And Intangible Assets [Line Items]    
Amortization expense   28
Selling and Marketing [Member]    
Goodwill And Intangible Assets [Line Items]    
Amortization expense 608 687
Research and Development [Member]    
Goodwill And Intangible Assets [Line Items]    
Amortization expense $ 555 $ 181