Investments and Other Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024	Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]
Investments and other assets	$ 80,243		$ 80,243		$ 44,264
Collaboration revenue	14,245	$ 6,957	30,872	$ 35,892
AvenCell Therapeutics, Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Reclassification of other comprehensive income (loss) - equity method investment			2,100
Kyverna Therapeutics Inc [Member]
Schedule of Equity Method Investments [Line Items]
Collaboration revenue	0		0
AvenCell [Member]
Schedule of Equity Method Investments [Line Items]
Investments and other assets	7,900		7,900		7,900
Investment Owned, Fair Value	7,900		7,900		7,900	$ 11,800
Collaboration revenue	21,000		21,000
AvenCell [Member] | AvenCell Therapeutics, Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage						33.33%
Sparing Vision [Member]
Schedule of Equity Method Investments [Line Items]
Investments and other assets	14,600		14,600		14,600
Investment Owned, Fair Value	14,600		14,600		$ 14,600
Collaboration revenue	$ 0	$ 500	$ 0	$ 1,100