Loss per share - Schedule of basic and diluted loss per share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024
Numerator:
Net loss	$ (26,020)	$ (26,322)	$ (17,716)	$ (28,361)	$ (52,342)	$ (46,077)
Denominator:
Weighted-average number of shares used in computed net loss per share − basic	71,005,743		68,810,259		70,919,871	68,621,214
Weighted-average number of shares used in computed net loss per share − diluted	71,005,743		68,810,259		70,919,871	68,621,214
Net loss per share − basic (in dollars per share)	$ (0.37)		$ (0.26)		$ (0.74)	$ (0.67)
Net loss per share − diluted (in dollars per share)	$ (0.37)		$ (0.26)		$ (0.74)	$ (0.67)