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Fair Value Measurements - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Accrued interest receivable excluded from fair value and amortized cost basis of available for sale securities	$ 2,800	$ 2,800
Write off of accrued interest receivable		0	$ 0
Total unrealized gains recorded in accumulated other comprehensive income (loss)		11,600
Brii Bio Parent [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment Owned At Fair Value	22,800	22,800
Increase Decrease In Equity Securities Fv Ni	13,600	120,000
Humabs
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Estimated fair value of contingent consideration	$ 29,600	$ 29,600		$ 17,100
TomegaVax
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Asset Acquisition, Contingent Consideration, Liability				5,700
Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Securities contractual term	2 years	2 years
Prepaid Expenses and Other Current Assets
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Accrued interest receivable excluded from fair value and amortized cost basis of available for sale securities				$ 1,100

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Amount of liability recognized from contingent consideration in asset acquisition.

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