Acquisitions and Related Arrangements - Purchase Consideration (Details) - USD ($) $ in Thousands					12 Months Ended
	Dec. 05, 2025	Nov. 17, 2025	Sep. 17, 2025	Aug. 11, 2025	Dec. 31, 2025
Asset Acquisition, Consideration Transferred
Closing cash payment			$ 98,968
CVR consideration adjustment			5,673
Transaction costs			708
Total purchase consideration			105,349
LAVA
Asset Acquisition, Consideration Transferred
Consideration payable / deferred consideration payable		$ 3,565
Closing cash payment		24,547
CVR consideration adjustment		9,114			$ 9,100
Transaction costs		1,752
Total purchase consideration		$ 38,978
HilleVax
Asset Acquisition, Consideration Transferred
CVR consideration adjustment					$ 5,700
Total purchase consideration			$ 105,349
Turnstone
Asset Acquisition, Consideration Transferred
Closing cash payment				$ 7,868
CVR consideration adjustment				1,110
Transaction costs				596
Total purchase consideration				$ 9,574
Mural
Asset Acquisition, Consideration Transferred
Consideration payable / deferred consideration payable	$ 35,333
Closing cash payment	901
Transaction costs	1,400
Total purchase consideration	$ 37,634