Goodwill and Intangible Assets - Schedule of Finite-Life Intangible Assets, Amortization Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020
Goodwill And Intangible Assets [Line Items]
Amortization expense	$ 298	$ 308	$ 930	$ 891
Selling and Marketing [Member]
Goodwill And Intangible Assets [Line Items]
Amortization expense	184	190	574	556
Research and Development [Member]
Goodwill And Intangible Assets [Line Items]
Amortization expense	$ 114	$ 118	$ 356	$ 335