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, 2021
Goodwill And Intangible Assets [Line Items]
Amortization expense	$ 316	$ 632
Selling and Marketing [Member]
Goodwill And Intangible Assets [Line Items]
Amortization expense	195	390
Research and Development [Member]
Goodwill And Intangible Assets [Line Items]
Amortization expense	$ 121	$ 242