Balance Sheet Components - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jul. 31, 2020	Jan. 31, 2020
Balance Sheet Components [Abstract]
Proceeds from employee equity transactions to be remitted to employees and tax authorities	$ 284,550	$ 49,287
Accrued compensation and benefits	133,629	36,732
Accrued expenses	87,492	17,475
Sales and other tax liabilities	22,998	3,774
Operating lease liabilities, current	9,667	7,675
Customer deposits liabilities	9,582	3,414
Other	12,270	4,335
Accrued expenses and other current liabilities	$ 560,188	$ 122,692