Stock-based compensation - Stock Options - (Details) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, beginning balance (in shares) | shares	6,199,571
Granted (in shares) | shares	1,663,200
Exercised (in shares) | shares	(250,341)
Cancelled or forfeited (in shares) | shares	(277,659)
Outstanding, ending balance (in shares) | shares	7,334,771	6,199,571
Exercisable (in shares) | shares	3,300,800
Weighted Average Exercise Price
Outstanding (in dollars per share) | $ / shares	$ 8.12
Granted (in dollars per share) | $ / shares	8.32
Exercised (in dollars per share) | $ / shares	5.97
Cancelled or forfeited (in dollars per share) | $ / shares	9.71
Outstanding (in dollars per share) | $ / shares	8.18	$ 8.12
Exercisable (in dollars per share) | $ / shares	$ 9.77
Remaining Contractual Life
Outstanding	8 years	7 years 10 months 24 days
Exercisable	6 years 8 months 12 days
Aggregate Intrinsic Value
Outstanding | $	$ 29,875	$ 6,095
Exercisable | $	11,634
Stock options
Options disclosures
Unrecognized stock-based compensation expense | $	$ 17,200
Remaining weighted-average remaining vesting period	2 years 9 months 18 days