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Net Loss Per Share Attributable to Common Stockholders - Anti Dilutive Equivalents (Details) - shares
12 Months Ended
Jan. 31, 2023
Jan. 31, 2022
Jan. 31, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti-dilutive common equivalent shares (in shares) 18,675,711 17,095,994 18,732,960
Options to purchase common stock | Common Stock      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti-dilutive common equivalent shares (in shares) 4,593,704 6,620,701 8,871,890
Restricted stock and restricted stock units      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti-dilutive common equivalent shares (in shares) 11,564,867 10,184,214 9,545,352
Shares estimated to be purchased under ESPP      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti-dilutive common equivalent shares (in shares) 517,140 291,079 315,718
Performance-based restricted stock units      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti-dilutive common equivalent shares (in shares) 2,000,000 0 0