Stock-based compensation - Schedule of Stock Option Activity (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) $ / shares shares
Share-based Payment Arrangement [Abstract]
Number of options, Outstanding, Beginning balance | shares	6,119,295
Number of options, Granted | shares	1,633,600
Number of options, Exercised | shares	(143,506)
Number of options, Forfeited | shares	(73,017)
Number of options, Outstanding, Ending balance | shares	7,536,372
Number of options, Exercisable | shares	1,856,666
Number of options, Expected to vest | shares	5,679,706	[1]
Weighted average exercise price, Beginning balance | $ / shares	$ 9.44
Weighted average exercise price, Granted | $ / shares	31.08
Weighted average exercise price, Exercised | $ / shares	3.52
Weighted average exercise price, Forfeited | $ / shares	27.96
Weighted average exercise price, Ending balance | $ / shares	14.15
Weighted average exercise price, Exercisable | $ / shares	3.36
Weighted average exercise price, Expected to vest | $ / shares	$ 17.68	[1]
Weighted average remaining contractual life (in years), Outstanding	8 years 9 months 18 days
Weighted average remaining contractual life (in years), Exercisable	7 years 10 months 24 days
Weighted average remaining contractual life (in years), Expected to vest	9 years	[1]
Aggregate intrinsic value, Outstanding | $	$ 91,068	[2]
Aggregate intrinsic value, Exercisable | $	36,140	[2]
Aggregate intrinsic value, Expected to vest | $	$ 54,928	[1],[2]

[1] This represents the number of unvested options outstanding as of March 31, 2022 that are expected to vest in the future.

[2] The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying options and the fair value of the common stock for the options that were in the money as of March 31, 2022.