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Equity and Other Investments and Fair Value Measurements - Equity Investment in ImaginAb (Details) - ImaginAb - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2021 | Mar. 31, 2024 | Mar. 31, 2025 | Dec. 31, 2024
Equity Investment |  |  |  |
Debt instrument maturity date | May 30, 2025 |  |  |
Consolidated Investees [Member] |  |  |  |
Equity Investment |  |  |  |
Equity investment ownership percentage |  |  | 11.80% | 11.80%
Common and preferred stock |  |  |  |
Equity Investment |  |  |  |
Number of shares purchased under the securities purchase agreement | 8,825,301 |  |  |
Amount of securities purchase agreement | $ 7.6 |  |  |
Equity and long-term investments at fair value |  |  | $ 7.6 | $ 7.6
ImaginAb Convertible Note |  |  |  |
Equity Investment |  |  |  |
Amount of securities purchase agreement | $ 4.8 |  |  |
Unrealized loss from fair value changes in equity investments |  | $ 0.2 |  |
Equity and long-term investments at fair value |  |  | $ 5.0 | $ 5.0

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