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Contingencies and commitments (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024	Dec. 31, 2023	Oct. 31, 2014
Contingencies and Commitments [Line Items]
Fair value of contingent consideration	$ 10,784	$ 10,225	$ 7,991	$ 7,600
Recurring
Contingencies and Commitments [Line Items]
Fair value of contingent consideration	10,784	$ 10,225
Enantigen's Selling Shareholders | Recurring
Contingencies and Commitments [Line Items]
Fair value of contingent consideration	$ 10,800				$ 0
Enantigen's Selling Shareholders | Arbutus Inc.
Contingencies and Commitments [Line Items]
Development and regulatory milestones payment per licensed compound series, maximum					102,500
Development and regulatory milestones payment per royalty, maximum					$ 1,000

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Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled beyond one year or the normal operating cycle, if longer.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479581/805-30-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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