Summary of Significant Accounting Policies - Summary of Reconciliation of Cash, Cash Equivalents, and Restricted Cash (Details) - USD ($) $ in Thousands	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Accounting Policies [Abstract]
Cash and cash equivalents	$ 1,355,828	$ 270,793	$ 110,519
Restricted cash included in other assets, non-current	1,783	1,783	1,780
Cash, cash equivalents, and restricted cash	$ 1,357,611	$ 272,576	$ 112,299