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Stockholders' Equity (Deficit) and Employee Incentive Plans - Summary of Stock Option Activity under Stock Plans (Details) - Stock options outstanding - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jul. 31, 2022
Apr. 30, 2022
Jul. 31, 2022
Jan. 31, 2022
Options Outstanding, Number of Options        
Beginning balance (in shares)   9,150,821 9,150,821  
Options exercised (in shares)     (544,257)  
Options granted (in shares) 0   0  
Options cancelled (in shares)     (309,304)  
Ending balance (in shares) 8,297,260   8,297,260  
Options vested and expected to vest (in shares) 8,297,260   8,297,260  
Options vested and exercisable (in shares) 6,290,244   6,290,244  
Options Outstanding, Weighted Average Exercise Price        
Beginning balance (in dollars per share)   $ 9.76 $ 9.76  
Options exercised (in dollars per share)     6.02  
Options granted (in dollars per share)     0  
Options cancelled (in dollars per share)     13.24  
Ending balance (in dollars per share) $ 9.87   9.87  
Options vested and expected to vest (in dollars per share) 9.87   9.87  
Options vested and exercisable (in dollars per share) $ 7.84   $ 7.84  
Stock Options Additional Disclosures        
Options outstanding, weighted average remaining contractual term (in years)   6 years 6 months 10 days 5 years 11 months 12 days  
Options vested and expected to vest, weighted-average contractual term (in years)     5 years 11 months 12 days  
Options vested and exercisable, weighted-average contractual term (in years)     5 years 2 months 19 days  
Options outstanding, aggregate intrinsic value $ 57,061   $ 57,061 $ 126,368
Options vested and expected to vest, aggregate intrinsic value 57,061   57,061  
Options vested and exercisable, aggregate intrinsic value $ 50,815   $ 50,815