Collaboration agreements - Other Revenue (Details) - USD ($)	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Collaboration agreements
Collaboration revenue	$ 40,497,000	$ 36,855,000	$ 26,581,000
Limited services \| Asana BioSciences
Collaboration agreements
Collaboration revenue	$ 0	0	$ 300,000
Development Milestone Achieved \| Asana BioSciences
Collaboration agreements
Collaboration revenue		$ 2,500,000

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details