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Investments - Narrative (Details) - USD ($) | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2024 | Sep. 30, 2024 | Dec. 31, 2023
PanTHERA CryoSolutions, Inc. | Series E Preferred Stock |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Fair value of non-marketable equity securities without readily determinable fair value |  | $ 1,000,000.0 | $ 1,000,000.0
iVexSol, Inc. |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Fair value of non-marketable equity securities without readily determinable fair value |  | $ 0 |
Impairment charge | $ 4,100,000 |  |
iVexSol, Inc. | Series A-1 and A-2, Preferred Stock |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Fair value of non-marketable equity securities without readily determinable fair value |  |  | $ 4,100,000

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