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Net Loss Per Share Attributable to Common Stockholders - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Oct. 31, 2021
Jul. 31, 2021
Apr. 30, 2021
Oct. 31, 2020
Jul. 31, 2020
Apr. 30, 2020
Oct. 31, 2021
Oct. 31, 2020
Jan. 31, 2021
Earnings Per Share [Abstract]                  
Net loss attributable to common stockholders $ (24,926) $ (27,592) $ (17,631) $ (22,041) $ (25,116) $ (29,224) $ (70,149) $ (76,381) $ (94,692)
Weighted-average common shares outstanding, basic (in shares) 128,570,237     120,721,555     126,967,336 118,594,452  
Weighted-average common shares outstanding, diluted (in shares) 128,570,237     120,721,555     126,967,336 118,594,452  
Net loss per share attributable to common stockholders, basic (in dollars per share) $ (0.19)     $ (0.18)     $ (0.55) $ (0.64)  
Net loss per share attributable to common stockholders, diluted (in dollars per share) $ (0.19)     $ (0.18)     $ (0.55) $ (0.64)