Description of Business and Basis of Presentation (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021	Oct. 31, 2020	Jan. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accumulated deficit	$ (751,505)	$ (679,414)
Cash, cash equivalents, and restricted cash	$ 365,891	$ 145,891	$ 169,093	$ 73,153