Balance Sheet Components - Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Jul. 31, 2021	Jan. 31, 2021
Balance Sheet Components [Abstract]
Prepaid expenses	$ 87,428	$ 60,702
Restricted cash from international employee stock sales	63,185	50,475
Other	21,675	5,642
Prepaid expenses and other current assets	$ 172,288	$ 116,819

Amount of asset related to consideration paid in advance for costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer.

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Name:	us-gaap_PrepaidExpenseCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant