Net Loss Per Share - Schedule of Basic and Diluted Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024
Numerator:
Net loss	$ (71,151)	$ (129,072)	$ (176,600)
Denominator:
Weighted-average shares used to compute net loss per share, basic (in shares)	81,246,520	74,555,001	71,248,982
Weighted-average shares used to compute net loss per share, diluted (in shares)	81,246,520	74,555,001	71,248,982
Net loss per share, diluted (in dollars per share)	$ (0.88)	$ (1.73)	$ (2.48)
Net loss per share, basic (in dollars per share)	$ (0.88)	$ (1.73)	$ (2.48)