Balance Sheet Components - Rollforward of Allowance For Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 17,000	$ 20,500
Provision for credit losses	13,407	1,028
Write-offs	(10,407)	(3,528)
Ending balance	$ 20,000	$ 18,000