The number of the Company's Board members currently serving on the Investee's Board.

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The amount the Company agreed to pay for common stock and warrants upon satisfaction of certain closing conditions under the terms of the securities purchase agreement.

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The total number of shares to be purchased under the terms of a securities purchase agreement.

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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

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- Definition

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 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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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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No definition available.

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The cash outflow for cost incurred directly with the issuance of an equity security.

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Equity and Other Investments and Fair Value Measurements - Equity Investment in ImaginAb (Details) $ in Thousands				3 Months Ended
	Sep. 14, 2023 USD ($) shares	Mar. 14, 2023 USD ($) shares	Mar. 18, 2021 USD ($) shares	Mar. 31, 2024 USD ($) Director	Feb. 23, 2024 USD ($)	Dec. 31, 2023 USD ($)
Equity Investment
Total purchase price				$ 453,500		$ 453,500
ImaginAb
Equity Investment
Transaction costs to acquire equity securities			$ 400
Number of Investee's Board members currently representing the Company \| Director				1
ImaginAb \| Consolidated Investees [Member]
Equity Investment
Equity investment ownership percentage				11.80%		12.40%
ImaginAb \| Series C preferred stock
Equity Investment
Number of shares to be purchased under the securities purchase agreement \| shares			4,051,724
Amount of securities purchase agreement			$ 4,700
ImaginAb \| Series C-2 preferred stock
Equity Investment
Number of shares to be purchased under the securities purchase agreement \| shares	405,852	270,568
Amount of securities purchase agreement	$ 600	$ 600
ImaginAb \| Series C preferred stock, Series C-2 preferred stock and common stock
Equity Investment
Equity and long-term investments at fair value				$ 7,600		$ 7,600
ImaginAb \| ImaginAb Convertible Note
Equity Investment
Total purchase price					$ 2,700
Debt Instrument, annual interest rate					10.00%
Unrealized loss from fair value changes in equity investments				200
Equity and long-term investments at fair value				$ 2,900
ImaginAb \| One of ImaginAb's Common Stockholders \| Common stock
Equity Investment
Number of shares to be purchased under the securities purchase agreement \| shares			4,097,157
Amount of securities purchase agreement			$ 1,300