Equity and Long-term Investments and Fair Value Measurements - Schedule of Available-for-Sale Securities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2023		Dec. 31, 2022
Financial Instruments and Fair Value Measurements
Contingent value rights	$ 595		$ 595
ISP Fund LP
Liabilities
Lock-up period	36 months		36 months
Contributed to partnership for investing	$ 300,000		$ 300,000
ISP Fund LP | Convertible Debt
Assets
Total assets measured at estimated fair value	57,100
Money market funds | ISP Fund LP
Assets
Total assets measured at estimated fair value	36,900		25,100
Equity investment | ISP Fund LP
Assets
Total assets measured at estimated fair value	298,500		295,400
Private Placement Positions and Convertible Notes | ISP Fund LP
Assets
Total assets measured at estimated fair value			54,600
Recurring basis
Assets
Total assets measured at estimated fair value	580,874		639,488
Recurring basis | Money market funds
Assets
Total assets measured at estimated fair value	134,287		263,469
Recurring basis | Equity investments and money market funds | ISP Fund LP
Assets
Total assets measured at estimated fair value	241,388	[1]	320,560	[2]
Recurring basis | Term loan investment
Assets
Total assets measured at estimated fair value	26,199
Recurring basis | Term loan investment | Armata Term Loan
Assets
Total assets measured at estimated fair value	0
Recurring basis | Quoted Price in Active Markets for Identical Assets, Level 1
Assets
Total assets measured at estimated fair value	448,575		560,546
Recurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 | Money market funds
Assets
Total assets measured at estimated fair value	134,287		263,469
Recurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 | Equity investments and money market funds | ISP Fund LP
Assets
Total assets measured at estimated fair value	239,058	[1]	265,982	[2]
Recurring basis | Significant Other Observable Inputs, Level 2
Assets
Total assets measured at estimated fair value	31,810		8,059
Recurring basis | Significant Other Observable Inputs, Level 2 | Money market funds
Assets
Total assets measured at estimated fair value	0		0
Recurring basis | Significant Other Observable Inputs, Level 2 | Equity investments and money market funds | ISP Fund LP
Assets
Total assets measured at estimated fair value	0	[1]	0	[2]
Recurring basis | Significant Other Observable Inputs, Level 2 | Term loan investment
Assets
Total assets measured at estimated fair value	0
Recurring basis | Significant Unobservable Inputs, Level 3
Assets
Total assets measured at estimated fair value	100,489		70,883
Recurring basis | Significant Unobservable Inputs, Level 3 | Money market funds
Assets
Total assets measured at estimated fair value	0		0
Recurring basis | Significant Unobservable Inputs, Level 3 | Equity investments and money market funds | ISP Fund LP
Assets
Total assets measured at estimated fair value	2,330	[1]	54,578	[2]
Recurring basis | Significant Unobservable Inputs, Level 3 | Term loan investment
Assets
Total assets measured at estimated fair value	26,199
Nonrecurring basis
Financial Instruments and Fair Value Measurements
Contingent value rights	595		595
Liabilities
Total liabilities measured at estimated fair value	410,263		506,259
Nonrecurring basis | Debt
Financial Instruments and Fair Value Measurements
2023 Notes			96,089
2025 Notes	191,923		197,807
2028 Notes	217,745		211,768
Total fair value of debt	409,668		505,664
Nonrecurring basis | Quoted Price in Active Markets for Identical Assets, Level 1
Financial Instruments and Fair Value Measurements
Contingent value rights	0		0
Liabilities
Total liabilities measured at estimated fair value	0		0
Nonrecurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 | Debt
Financial Instruments and Fair Value Measurements
2023 Notes			0
2025 Notes	0		0
2028 Notes	0		0
Total fair value of debt	0		0
Nonrecurring basis | Significant Other Observable Inputs, Level 2
Financial Instruments and Fair Value Measurements
Contingent value rights	0		0
Liabilities
Total liabilities measured at estimated fair value	409,668		505,664
Nonrecurring basis | Significant Other Observable Inputs, Level 2 | Debt
Financial Instruments and Fair Value Measurements
2023 Notes			96,089
2025 Notes	191,923		197,807
2028 Notes	217,745		211,768
Total fair value of debt	409,668		505,664
Nonrecurring basis | Significant Unobservable Inputs, Level 3
Financial Instruments and Fair Value Measurements
Contingent value rights	595		595
Liabilities
Total liabilities measured at estimated fair value	595		595
Nonrecurring basis | Significant Unobservable Inputs, Level 3 | Debt
Financial Instruments and Fair Value Measurements
2023 Notes			0
2025 Notes	0		0
2028 Notes	0		0
Total fair value of debt	0		0
Armata | Recurring basis | Convertible Debt
Assets
Total assets measured at estimated fair value	49,684
Armata | Recurring basis | Equity investment | Common stock
Assets
Total assets measured at estimated fair value	75,230		31,095
Armata | Recurring basis | Equity investment | Warrants
Assets
Total assets measured at estimated fair value	31,810		8,059
Armata | Recurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 | Convertible Debt
Assets
Total assets measured at estimated fair value	0
Armata | Recurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 | Equity investment | Common stock
Assets
Total assets measured at estimated fair value	75,230		31,095
Armata | Recurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 | Equity investment | Warrants
Assets
Total assets measured at estimated fair value	0		0
Armata | Recurring basis | Significant Other Observable Inputs, Level 2 | Convertible Debt
Assets
Total assets measured at estimated fair value	0
Armata | Recurring basis | Significant Other Observable Inputs, Level 2 | Equity investment | Common stock
Assets
Total assets measured at estimated fair value	0		0
Armata | Recurring basis | Significant Other Observable Inputs, Level 2 | Equity investment | Warrants
Assets
Total assets measured at estimated fair value	31,810		8,059
Armata | Recurring basis | Significant Unobservable Inputs, Level 3 | Convertible Debt
Assets
Total assets measured at estimated fair value	49,684
Armata | Recurring basis | Significant Unobservable Inputs, Level 3 | Equity investment | Common stock
Assets
Total assets measured at estimated fair value	0		0
Armata | Recurring basis | Significant Unobservable Inputs, Level 3 | Equity investment | Warrants
Assets
Total assets measured at estimated fair value	0		0
InCarda | Recurring basis | Equity investment | Warrants
Assets
Total assets measured at estimated fair value			605
InCarda | Recurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 | Equity investment | Warrants
Assets
Total assets measured at estimated fair value			0
InCarda | Recurring basis | Significant Other Observable Inputs, Level 2 | Equity investment | Warrants
Assets
Total assets measured at estimated fair value			0
InCarda | Recurring basis | Significant Unobservable Inputs, Level 3 | Equity investment | Warrants
Assets
Total assets measured at estimated fair value			605
Gate Neuroscience [Member] | Recurring basis | Convertible Debt
Assets
Total assets measured at estimated fair value	22,276		15,700
Gate Neuroscience [Member] | Recurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 | Convertible Debt
Assets
Total assets measured at estimated fair value	0		0
Gate Neuroscience [Member] | Recurring basis | Significant Other Observable Inputs, Level 2 | Convertible Debt
Assets
Total assets measured at estimated fair value	0		0
Gate Neuroscience [Member] | Recurring basis | Significant Unobservable Inputs, Level 3 | Convertible Debt
Assets
Total assets measured at estimated fair value	$ 22,276		$ 15,700

[1] The investments held by ISP Fund LP consisted of $298.5 million in equity investments, which included $36.9 million in money market funds, and $57.1 million receivable from the maturity of convertible notes. Our total capital contribution of $300 million is subject to a 36-month lock-up period from the date of such capital contributions.

[2] The investments held by ISP Fund LP consisted of $295.4 million equity investments, which included private placement positions and convertible notes of $54.6 million, and $25.1 million in money market funds. Our total capital contributions of $300.0 million is subject to a 36-month lock-up period from the date of such capital contributions.