Operating income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Other Income and Expenses [Abstract]
Research tax credit	$ 1,072	$ 1,237	$ 3,640	$ 4,978
Other operating income	0	1,134	0	1,875
Total	$ 1,072	$ 2,372	$ 3,640	$ 6,853