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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, 2024
Apr. 30, 2023
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]    
Net loss $ (26,007) $ (24,403)
Weighted-average number of shares used in computing net loss per share, basic (in shares) 37,482 35,222
Weighted-average number of shares used in computing net loss per share, diluted (in shares) 37,482 35,222
Net loss per share, basic (in usd per share) $ (0.69) $ (0.69)
Net loss per share, diluted (in usd per share) $ (0.69) $ (0.69)
Class A Common Stock    
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]    
Net loss $ (2,265) $ (2,261)
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) $ (0.69) $ (0.69)
Net loss per share, diluted (in usd per share) $ (0.69) $ (0.69)
Class B Common Stock    
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]    
Net loss $ (23,742) $ (22,142)
Weighted-average number of shares used in computing net loss per share, basic (in shares) 34,218 31,958
Weighted-average number of shares used in computing net loss per share, diluted (in shares) 34,218 31,958
Net loss per share, basic (in usd per share) $ (0.69) $ (0.69)
Net loss per share, diluted (in usd per share) $ (0.69) $ (0.69)