Income taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income taxes
Provision for (benefit from) income taxes	$ 2,272	$ (238)	$ 1,137	$ (1,104)
Increase (decrease) in income taxes	$ 2,400