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
	Apr. 30, 2024	Apr. 30, 2023
Numerator:
Net loss	$ (19,722)	$ (37,531)
Denominator:
Weighted-average shares of common stock outstanding, basic (in shares)	56,666,311	53,347,709
Weighted-average shares of common stock outstanding, diluted (in shares)	56,666,311	53,347,709
Net loss per share attributable to common stockholders, basic (in dollars per share)	$ (0.35)	$ (0.70)
Net loss per share attributable to common stockholders, diluted (in dollars per share)	$ (0.35)	$ (0.70)