Share-based compensation - Share-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]
Share-based compensation expense	$ 15,242	$ 13,613	$ 8,514
Research and development
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]
Share-based compensation expense	3,440	2,245	784
Sales and marketing
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]
Share-based compensation expense	1,266	1,462	1,227
General and administrative
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]
Share-based compensation expense	$ 10,536	$ 9,906	$ 6,503