Net loss per share - Calculation of Basic and Diluted Net Earnings (Loss) per Share (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 attributable to common stockholders	$ (29,380)	$ (11,391)	$ (55,029)	$ (29,380)
Weighted-average shares used in computing net loss per share attributable to common stockholders
Basic (in shares)	140,035,203	37,269,650	139,691,508	36,726,992
Diluted (in shares)	140,035,203	37,269,650	139,691,508	36,726,992
Net loss per share attributable to common stockholders
Basic (in dollars per share)	$ (0.21)	$ (0.31)	$ (0.39)	$ (0.80)
Diluted (in dollars per share)	$ (0.21)	$ (0.31)	$ (0.39)	$ (0.80)