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Cash and Cash Equivalents, Investments and Fair Value Measurements - Debt (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Senior Notes due 2026 | Estimate of Fair Value Measurement | Senior Notes | Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible senior notes	$ 52.6	$ 105.8

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