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Equity Incentive Plans and Stock-Based Compensation - Summary of Restricted Stock Unit Activity (Details) - Restricted Stock Units
shares in Thousands
6 Months Ended
Jul. 31, 2022
$ / shares
shares
RSUs  
Unvested, beginning balance (in shares) 27,515
Granted (in shares) 13,771
Vested (in shares) (6,810)
Forfeited (in shares) (3,506)
Unvested, ending balance (in shares) 30,970
Weighted-Average Grant Date Fair Value Per Share  
Unvested, beginning balance (in dollars per share) | $ / shares $ 35.35
Granted (in dollars per share) | $ / shares 19.15
Vested (in dollars per share) | $ / shares 30.22
Forfeited (in dollars per share) | $ / shares 36.02
Unvested, ending balance (in dollars per share) | $ / shares $ 29.08
Class A Common Stock  
Weighted-Average Grant Date Fair Value Per Share  
Vested RSUs that were unsettled (in shares) 128