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Net Loss Per Share - Computation of Net Loss Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended
Apr. 30, 2025
Apr. 30, 2024
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]    
Net loss $ (18,052) $ (26,007)
Weighted-average number of shares used in computing net loss per share, basic (in shares) 39,735 37,482
Weighted-average number of shares used in computing net loss per share, diluted (in shares) 39,735 37,482
Net loss per share, basic (in usd per share) $ (0.45) $ (0.69)
Net loss per share, diluted (in usd per share) $ (0.45) $ (0.69)
Class A Common Stock    
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]    
Net loss $ (1,483) $ (2,265)
Weighted-average number of shares used in computing net loss per share, basic (in shares) 3,264 3,264
Weighted-average number of shares used in computing net loss per share, diluted (in shares) 3,264 3,264
Net loss per share, basic (in usd per share) $ (0.45) $ (0.69)
Net loss per share, diluted (in usd per share) $ (0.45) $ (0.69)
Class B Common Stock    
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]    
Net loss $ (16,569) $ (23,742)
Weighted-average number of shares used in computing net loss per share, basic (in shares) 36,471 34,218
Weighted-average number of shares used in computing net loss per share, diluted (in shares) 36,471 34,218
Net loss per share, basic (in usd per share) $ (0.45) $ (0.69)
Net loss per share, diluted (in usd per share) $ (0.45) $ (0.69)