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Equity Incentive Plans and Employee Stock Purchase Plan - Schedule of Restricted Stock Unit Activity (Details) - Restricted Stock Units (RSUs)
 9 Months Ended
Oct. 31, 2022
$ / shares
shares
Shares  
Unvested - beginning of period (in shares) | shares 3,226,759
RSUs granted (in shares) | shares 1,790,022
RSUs vested (in shares) | shares (1,139,763)
RSUs forfeited and canceled (in shares) | shares (296,995)
Unvested - end of period (in shares) | shares 3,580,023
Weighted-Average Grant Date Fair Value per RSU  
Unvested - beginning of period (in dollars per share) | $ / shares $ 258.85
RSUs granted (in dollars per share) | $ / shares 316.47
RSUs vested (in dollars per share) | $ / shares 214.84
RSUs forfeited and canceled (in dollars per share) | $ / shares 291.22
Unvested - end of period (in dollars per share) | $ / shares $ 298.99