Business Combinations, Intangible Assets, and Goodwill - Narrative (Details) $ in Thousands	12 Months Ended
	Jan. 31, 2022 USD ($)	Jan. 31, 2021 USD ($)	Jan. 31, 2020 USD ($) private_placement
Business Acquisition [Line Items]
Goodwill	$ 8,449	$ 8,449	$ 7,049
Number of privately-held companies | private_placement			2
Amortization expense	7,800	2,800	$ 900
Assembled workforce
Business Acquisition [Line Items]
Intangible assets acquired	$ 28,300
Weighted-average useful life	4 years
Privately-Held Company
Business Acquisition [Line Items]
Cash paid for acquisition		7,100
Goodwill		1,400	7,000
Consideration transferred			13,300
Net assets acquired			1,100
Deferred tax liability			(500)
Privately-Held Company | Developed technology
Business Acquisition [Line Items]
Intangible assets		$ 5,700	$ 5,600
Estimated useful life		5 years	5 years
Privately-Held Company | Customer-Related Intangible Assets
Business Acquisition [Line Items]
Intangible assets			$ 100