Stockholders' equity - RSU Activity (Details) - Restricted Stock Units (RSUs)	6 Months Ended
	Jun. 30, 2022 $ / shares shares
RSUs Outstanding
Unvested beginning balance (in shares) | shares	2,545,051
Granted (in shares) | shares	6,033,535
Released (in shares) | shares	(85,226)
Canceled (in shares) | shares	(505,242)
Unvested ending balance (in shares) | shares	7,988,118
Weighted Average Grant Date Fair Value
Unvested beginning balance (in USD per share) | $ / shares	$ 27.64
Granted (in USD per share) | $ / shares	12.79
Released (in USD per share) | $ / shares	24.30
Canceled (in USD per share) | $ / shares	19.15
Unvested ending balance (in USD per share) | $ / shares	$ 17.00