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Net Loss per Share - Anti-dilutive Securities (Details) - shares
shares in Thousands
3 Months Ended
Apr. 30, 2024
Apr. 30, 2023
Shares subject to outstanding common stock awards    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share (in shares) 14,813 15,674
Restricted stock issued to acquire key personnel    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share (in shares) 25 63
Shares issuable pursuant to the ESPP    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share (in shares) 267 295