Balance Sheet Components - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued expenses	$ 157,167	$ 17,475
Accrued compensation and benefits	118,640	36,732
Proceeds from employee equity transactions to be remitted to employees and tax authorities	54,174	49,287
Sales and other tax liabilities	27,453	3,774
Customer deposit liabilities	13,050	3,414
Operating lease liabilities, current	15,601	7,675
Other	6,933	4,335
Accrued expenses and other current liabilities	$ 393,018	$ 122,692