Financial instruments and fair value measurements - Contingent consideration (Details) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025
Financial instruments and fair value measurements
Beginning balance		$ 8,738
Change in fair value		$ 145
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		General and Administrative Expense.
Ending balance		$ 8,883
Gadeta
Financial instruments and fair value measurements
Beginning balance		413
Ending balance		413
Holdback Shares
Financial instruments and fair value measurements
Beginning balance		625
Change in fair value		(264)
Ending balance		361
Milestone
Financial instruments and fair value measurements
Beginning balance	$ 3,757	7,700
Change in fair value	$ (3,757)	409
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	General and Administrative Expense.
Ending balance		$ 8,109

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
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Indicates line item in statement of income or comprehensive income that includes gain (loss) from liability measured at fair value using unobservable input (level 3).

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