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Contingencies and commitments (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023	Oct. 31, 2014
Contingencies and Commitments [Line Items]
Fair value of contingent consideration	$ 10,524	$ 10,225	$ 7,780	$ 7,600
Recurring
Contingencies and Commitments [Line Items]
Fair value of contingent consideration	10,524	$ 10,225
Enantigen's Selling Shareholders | Recurring
Contingencies and Commitments [Line Items]
Fair value of contingent consideration	$ 10,500				$ 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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