Goodwill and Acquired Intangible Assets, Net - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Oct. 31, 2021	Jan. 31, 2021
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 53,300	$ 49,900
Accumulated Amortization	(30,397)	(23,625)
Net Book Value	22,903	26,275
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	38,100	34,700
Accumulated Amortization	(21,447)	(16,955)
Net Book Value	$ 16,653	$ 17,745
Weighted average useful life	2 years 10 months 24 days	3 years 3 months 18 days
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 15,200	$ 15,200
Accumulated Amortization	(8,950)	(6,670)
Net Book Value	$ 6,250	$ 8,530
Weighted average useful life	2 years 1 month 6 days	2 years 9 months 18 days