Marketable Debt and Equity Securities - Equity Securities with Readily Determinable Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Equity Securities
Marketable equity securities	$ 78,637	$ 112,502
Common Stock
Equity Securities
Marketable equity securities	78,637	112,502
Zenas BioPharma, Inc. \| Common Stock
Equity Securities
Marketable equity securities	$ 78,637	$ 112,502

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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+ Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details