Property and Equipment, Net - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Property, Plant and Equipment [Line Items]
Capitalized internal-use software costs	$ 4,800	$ 700	$ 5,800	$ 1,300
Depreciation and amortization			3,637	1,298
Capitalized computer software, amortization	500	300	900	600
Property, Plant and Equipment
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 1,200	$ 700	$ 2,100	$ 1,300