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Equity and Long-term Investments and Fair Value Measurements - Equity Investment in InCarda (Details) - InCarda $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2023 USD ($)	Dec. 31, 2025 USD ($) Director shares	Dec. 31, 2024 USD ($) shares	Dec. 31, 2023 USD ($)
Equity Investment
Number of Investee's Board members currently representing the Company | Director		0
Number of the Investee's Board members | Director		6
Carrying value wrote off warrant exercise				$ 0.1
Unrealized loss from fair value changes in equity investments				$ 3.1
Innoviva TRC Holdings, LLC
Equity Investment
Maximum number of additional shares into which warrants may be converted under the securities purchase agreement | shares		2,490,033	2,490,033
Consolidated Investees
Equity Investment
Equity investment ownership percentage		9.50%	9.10%
InCarda October 2025 Convertible Note
Equity Investment
Amount of securities purchase agreement		$ 1.2
InCarda February 2025 Convertible Note
Equity Investment
Amount of securities purchase agreement		0.5
InCarda 2024 Convertible Note
Equity Investment
Amount of securities purchase agreement		0.4
InCarda Convertible Note
Equity Investment
Equity and long-term investments at fair value		$ 2.1	$ 0.4
Common and Preferred Stock | Innoviva TRC Holdings, LLC
Equity Investment
Number of shares to be purchased under the securities purchase agreement | shares		36,742,250	36,742,250
Series C preferred stock
Equity Investment
Equity and long-term investments at fair value		$ 4.8	$ 4.8
Series D Warrants
Equity Investment
Equity and long-term investments at fair value		0.1	0.1
Series D 1 And D 2 Preferred Stock And Common Stock
Equity Investment
Equity and long-term investments at fair value		$ 2.7	$ 2.7
Backsolve Valuation
Equity Investment
Impairment of equity investments	$ 2.9
Significant Unobservable Inputs, Level 3 | Backsolve Valuation
Equity Investment
Expected holding period	2 years
Risk free interest rate	4.90%
Dividend yield	0.00%
Estimated volatility	114.20%

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