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Investment in MiNK Therapeutics, Inc. (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2025	Jul. 31, 2025	Jul. 17, 2025	Dec. 31, 2024
Schedule of Equity Method Investments [Line Items]
Equity method investment in MiNK Therapeutics, Inc.	$ 30,482	$ 30,482			$ 0
MiNK Therapeutics, Inc.
Schedule of Equity Method Investments [Line Items]
Ownership percentage	48.00%	48.00%	50.00%	50.00%
Percentage of Non-controlling interest	0.00%	0.00%			45.00%
Recognized a gain on deconsolidation	$ 100,900	$ 100,900
Fair value retained investment on deconsolidation			$ 50,600
Fair value of equity investment	30,500	30,500
Equity method investment in MiNK Therapeutics, Inc.	$ 51,300	$ 51,300
Investment percentage of asset balance	20.00%	20.00%

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