Net loss per share - Schedule of Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Numerator:
Net loss	$ (19,262)	$ (36,199)	$ (39,786)	$ (60,399)
Denominator:
Weighted‑average shares used to compute net loss per share, basic (in shares)	127,911,770	124,382,767	127,603,390	123,905,072
Weighted‑average shares used to compute net loss per share, diluted (in shares)	127,911,770	124,382,767	127,603,390	123,905,072
Basic net loss per share (in dollars per share)	$ (0.15)	$ (0.29)	$ (0.31)	$ (0.49)
Diluted net loss per share (in dollars per share)	$ (0.15)	$ (0.29)	$ (0.31)	$ (0.49)