Net loss per share - Summary of Net Earnings (Loss) per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Numerator:
Net loss	$ (16,767)	$ (46,693)	$ (87,046)	$ (101,722)
Net loss	$ (16,767)	$ (46,693)	$ (87,046)	$ (101,722)
Weighted-average shares used in computing net loss per share
Basic (in shares)	151,307,963	140,951,605	148,392,636	140,116,156
Diluted (in shares)	151,307,963	140,951,605	148,392,636	140,116,156
Net loss per share
Basic (in dollars per share)	$ (0.11)	$ (0.33)	$ (0.59)	$ (0.73)
Diluted (in dollars per share)	$ (0.11)	$ (0.33)	$ (0.59)	$ (0.73)