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, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Numerator:
Net loss	$ (17,716)	$ (28,361)	$ (35,922)	$ (34,780)	$ (46,077)	$ (70,702)
Denominator:
Weighted-average number of shares used in computed net loss per share − basic	68,810,259		49,063,631		68,621,214	49,048,062
Weighted-average number of shares used in computed net loss per share − diluted	68,810,259		49,063,631		68,621,214	49,048,062
Net loss per share − basic (in dollars per share)	$ (0.26)		$ (0.73)		$ (0.67)	$ (1.44)
Net loss per share − diluted (in dollars per share)	$ (0.26)		$ (0.73)		$ (0.67)	$ (1.44)