Stock-based compensation - Stock Options Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Number of options
Balance (in shares)	16,336,134	12,654,807
Granted (in shares)	1,500,081	4,369,866
Exercised (in shares)	(1,380,609)	(105,203)
Forfeited (in shares)	(1,050,228)	(412,132)
Expired/Cancelled (in shares)	(17,832)	(171,204)
Balance (in shares)	15,387,546	16,336,134	12,654,807
Exercisable (in shares)	11,309,426
Unvested (in shares)	4,076,090
Weighted  average  exercise  price  ($)
Balance (in usd per share)	$ 0.81	$ 0.81
Granted (in usd per share)	10.07	0.82
Exercised (in usd per share)	0.81	0.81
Forfeited (in usd per share)	1.43	0.81
Expired/Cancelled (in usd per share)	0.81	0.81
Balance (in usd per share)	1.76	$ 0.81	$ 0.81
Exercisable (in usd per share)	0.89
Unvested (in usd per share)	$ 3.86
Weighted average remaining contractual term (years)
Balance	7 years 1 month 13 days	8 years 6 months 18 days	9 years 4 months 17 days
Exercisable	6 years 6 months 10 days
Unvested	8 years 8 months 26 days
Aggregate intrinsic value ($)
Balance	$ 8,763	$ 80,179	$ 0
Exercised	1,981
Exercisable	7,056
Unvested	$ 1,706