Net loss per share - Schedule of Computation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Numerator:
Net loss	$ (63,139)	$ (16,467)	$ (88,768)	$ (21,056)
Denominator:
Weighted‑average shares used to compute net loss per share, basic (in shares)	119,941,482	117,909,720	119,768,871	117,649,467
Weighted‑average shares used to compute net loss per share, diluted (in shares)	119,941,482	117,909,720	119,768,871	117,649,467
Basic net loss per share (in dollars per share)	$ (0.53)	$ (0.14)	$ (0.74)	$ (0.18)
Diluted net loss per share (in dollars per share)	$ (0.53)	$ (0.14)	$ (0.74)	$ (0.18)