Quarterly report pursuant to Section 13 or 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
 3 Months Ended 6 Months Ended
Jul. 31, 2021
Jul. 31, 2020
Jul. 31, 2021
Jul. 31, 2020
Goodwill And Intangible Assets [Line Items]        
Amortization expense $ 316 $ 299 $ 632 $ 583
Selling and Marketing [Member]        
Goodwill And Intangible Assets [Line Items]        
Amortization expense 195 366 390 366
Research and Development [Member]        
Goodwill And Intangible Assets [Line Items]        
Amortization expense $ 121 $ (67) $ 242 $ 217