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, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Numerator:
Net loss	$ (20,875)	$ (19,262)	$ (20,346)	$ (39,786)
Denominator:
Weighted‑average shares used to compute net loss per share, basic (in shares)	132,236,895	127,911,770	131,047,901	127,603,390
Weighted‑average shares used to compute net loss per share, diluted (in shares)	132,236,895	127,911,770	131,047,901	127,603,390
Net loss per share, basic (in dollars per share)	$ (0.16)	$ (0.15)	$ (0.16)	$ (0.31)
Net loss per share, diluted (in dollars per share)	$ (0.16)	$ (0.15)	$ (0.16)	$ (0.31)