The total number of Board members of the Investee.

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The number of warrants issued or sold by the subsidiary or equity method investee per stock transaction.

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Special Terms on amended and restated investor rights agreement.

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Exercise price per share or per unit of warrants or rights outstanding.

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Identification of the lender and information about a contractual promise to repay a short-term or long-term obligation, which includes borrowings under lines of credit, notes payable, commercial paper, bonds payable, debentures, and other contractual obligations for payment. This may include rationale for entering into the arrangement, significant terms of the arrangement, which may include amount, repayment terms, priority, collateral required, debt covenants, borrowing capacity, call features, participation rights, conversion provisions, sinking-fund requirements, voting rights, basis for conversion if convertible and remarketing provisions. The description may be provided for individual debt instruments, rational groupings of debt instruments, or by debt in total.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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

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

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

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

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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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Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

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Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Equity and Long-term Investments and Fair Value Measurements - Equity Investment in Armata (Details) - Armata $ / shares in Units, $ in Millions			3 Months Ended
	Jan. 10, 2023 USD ($) $ / shares	Feb. 09, 2022 USD ($) $ / shares shares	Mar. 31, 2023 USD ($) Tranche Director	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($) shares	Mar. 31, 2021 USD ($) shares	Mar. 31, 2020 USD ($) shares	Dec. 31, 2022 USD ($)
Equity investment
Number of tranches \| Tranche			2
Percentage of maximum voting rights		49.50%	49.50%
Number of Investee's Board members currently representing the Company \| Director			3
Number of the Investee's Board members \| Director			8
Special terms on re-designating board member to board of investee		In addition, as of February 9, 2022, Armata entered into an amended and restated investor rights agreement with the Company and ISO, pursuant to which for as long as the Company and ISO hold at least 12.5% of the outstanding shares of Armata’s common stock on a fully-diluted, the Company and ISO shall have the right to designate two directors to Armata’s board of directors, and for so long as the Company and ISO hold at least 8%, but less than 12.5%, of the outstanding shares of Armata’s common stock on a fully-diluted basis, the Company and ISO shall have the right to designate one director to Armata’s board of directors, subject to certain conditions and qualifications set forth in the amended and restated investor rights agreement.
Consolidated Investees
Equity investment
Equity method investment ownership percentage			69.40%					69.40%
Two Directors
Equity investment
Armata outstanding shares percentage		12.50%
Secured Convertible Credit Agreement
Equity investment
Debt instrument, description	On January 10, 2023, we entered into a Secured Convertible Credit Agreement (the “Credit Agreement”) with Armata, under which we extended a one-year convertible note (the "Armata Convertible Note") in an aggregate amount of $30.0 million at an interest rate of 8.0% per annum.
Term loan facility in aggregate amount	$ 30.0
Debt Instrument, annual interest rate	8.00%
Debt instrument, term	1 year
Common stock and warrants
Equity investment
Amount of securities purchase agreement							$ 25.0
Unrealized loss				$ 4.2
Unrealized gain			$ 15.8
Warrants purchased in 2020
Equity investment
Number of warrants purchased under the securities purchase agreement \| shares							8,710,800
Exercise price of warrants \| $ / shares	$ 2.87
Term of warrants	5 years
Warrants purchased in 2021
Equity investment
Exercise price of warrants \| $ / shares	$ 3.25
Term of warrants	5 years
Warrants purchased in 2022
Equity investment
Exercise price of warrants \| $ / shares	$ 5.00
Term of warrants	5 years
Warrants
Equity investment
Equity method investments at fair value			13.1					$ 8.1
Common stock
Equity investment
Number of shares to be purchased under the securities purchase agreement \| shares							8,710,800
Equity method investments at fair value			41.9					$ 31.1
Armata Convertible Note
Equity investment
Equity method investments at fair value			32.8
Unrealized gain			$ 2.8
Minimum [Member] \| One Director
Equity investment
Armata outstanding shares percentage		8.00%
Maximum [Member] \| One Director
Equity investment
Armata outstanding shares percentage		12.50%
Innoviva Strategic Opportunities, LLC \| Common stock and warrants
Equity investment
Amount of securities purchase agreement		$ 45.0				$ 20.0
Innoviva Strategic Opportunities, LLC \| Warrants
Equity investment
Number of warrants to be purchased under the securities purchase agreement \| shares		4,500,000				6,153,847
Exercise price of warrants \| $ / shares		$ 5.00
Innoviva Strategic Opportunities, LLC \| Common stock
Equity investment
Number of shares to be purchased under the securities purchase agreement \| shares					1,212,122
Number of shares to be purchased under the securities purchase agreement \| shares		9,000,000
Number of warrants to be purchased under the securities purchase agreement \| shares						6,153,847
Amount of securities purchase agreement					$ 4.0