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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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