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, 2026	Apr. 30, 2025
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net loss	$ (14,170)	$ (18,052)
Weighted-average number of shares used in computing net loss per share, basic (shares)	43,415	39,735
Weighted-average number of shares used in computing net loss per share, diluted (shares)	43,415	39,735
Net loss per share, basic (in usd per share)	$ (0.33)	$ (0.45)
Net loss per share, diluted (in usd per share)	$ (0.33)	$ (0.45)
Class A
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net loss	$ (1,065)	$ (1,483)
Weighted-average number of shares used in computing net loss per share, basic (shares)	3,264	3,264
Weighted-average number of shares used in computing net loss per share, diluted (shares)	3,264	3,264
Net loss per share, basic (in usd per share)	$ (0.33)	$ (0.45)
Net loss per share, diluted (in usd per share)	$ (0.33)	$ (0.45)
Class B
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net loss	$ (13,105)	$ (16,569)
Weighted-average number of shares used in computing net loss per share, basic (shares)	40,151	36,471
Weighted-average number of shares used in computing net loss per share, diluted (shares)	40,151	36,471
Net loss per share, basic (in usd per share)	$ (0.33)	$ (0.45)
Net loss per share, diluted (in usd per share)	$ (0.33)	$ (0.45)