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Fair value of financial instruments and marketable securities - Hierarchy (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Financial assets and liabilities measured at fair value on recurring basis
Marketable securities - available for sale	$ 421,625	$ 260,104
Contingent consideration payable	21,300	36,300
Transfers of assets measured between Level 1, Level 2, and Level 3	0	0
Recurring basis
Financial assets and liabilities measured at fair value on recurring basis
ClearPoint Equity Investments	4,822	6,074
ClearPoint convertible debt security	10,622	12,553
Recurring basis | Quoted prices in active markets for identical assets (Level 1)
Financial assets and liabilities measured at fair value on recurring basis
ClearPoint Equity Investments	4,822	6,074
Recurring basis | Significant other observable inputs (Level 2)
Financial assets and liabilities measured at fair value on recurring basis
ClearPoint convertible debt security	10,622	12,553
Recurring basis | Development and Regulatory Milestones
Financial assets and liabilities measured at fair value on recurring basis
Contingent consideration payable	9,800	26,600
Recurring basis | Development and Regulatory Milestones | Significant unobservable inputs (Level 3)
Financial assets and liabilities measured at fair value on recurring basis
Contingent consideration payable	9,800	26,600
Recurring basis | Net Sales Milestones and Royalties
Financial assets and liabilities measured at fair value on recurring basis
Contingent consideration payable	11,500	9,700
Recurring basis | Net Sales Milestones and Royalties | Significant unobservable inputs (Level 3)
Financial assets and liabilities measured at fair value on recurring basis
Contingent consideration payable	11,500	9,700
Recurring basis | Marketable securities
Financial assets and liabilities measured at fair value on recurring basis
Marketable securities - available for sale	421,625	260,104
Marketable securities - equity investments	16,889	22,634
Recurring basis | Marketable securities | Quoted prices in active markets for identical assets (Level 1)
Financial assets and liabilities measured at fair value on recurring basis
Marketable securities - equity investments	16,889	22,634
Recurring basis | Marketable securities | Significant other observable inputs (Level 2)
Financial assets and liabilities measured at fair value on recurring basis
Marketable securities - available for sale	$ 421,625	$ 260,104

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