Stock-based compensation - Stock Options - (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2023	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, beginning balance (in shares)	6,199,571
Granted (in shares)	1,358,200
Exercised (in shares)	(51,993)
Cancelled or forfeited (in shares)	(145,033)
Outstanding, ending balance (in shares)	7,360,745	6,199,571
Exercisable (in shares)	3,133,247
Weighted Average Exercise Price
Outstanding (in dollars per share)	$ 8.12
Granted (in dollars per share)	7.55
Exercised (in dollars per share)	3.56
Cancelled or forfeited (in dollars per share)	5.42
Outstanding (in dollars per share)	8.10	$ 8.12
Exercisable (in dollars per share)	$ 10.28
Remaining Contractual Life
Outstanding	8 years	7 years 10 months 24 days
Exercisable	6 years 4 months 24 days
Aggregate Intrinsic Value
Outstanding	$ 10,631	$ 6,095
Exercisable	4,025
Stock options
Options disclosures
Unrecognized stock-based compensation expense	$ 17,900
Remaining weighted-average remaining vesting period	3 years

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

Name:	us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.