Stock-based compensation - Narrative (Details) $ / shares in Units, $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($) $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options granted (in shares)	2,127,180
Stock options granted, weighted average exercise price (in dollars per share) | $ / shares	$ 5.51
Stock options granted, weighted average grant date fair value (in dollars per share) | $ / shares	$ 4.07
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation costs | $	$ 48.5
Expected to be recognized over a weighted average period	2 years 7 months 6 days
Performance-based RSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation costs | $	$ 8.8
Units vested (in shares)	60,776
Share-based compensation, number of common stock issuable per RSU vested (in shares)	1
Number of shares retained to cover statutory minimum withholding taxes	12,046
Time-based RSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation costs | $	$ 3.5
Expected to be recognized over a weighted average period	3 years 7 months 6 days
Units vested (in shares)	0