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Significant agreements - Collaboration revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Significant agreements.
Collaboration revenues	$ 2,676	$ 5,352	$ 31,567	$ 21,645
Bayer
Significant agreements.
Collaboration revenues	834	434	2,496	434
Novartis
Significant agreements.
Collaboration revenues	1,276	772	6,301	772
Ionis
Significant agreements.
Collaboration revenues	0	2,782	8,881	8,123
Genentech
Significant agreements.
Collaboration revenues	$ 566	1,364	$ 13,889	11,112
AstraZeneca
Significant agreements.
Collaboration revenues		$ 0		$ 1,204

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