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 ($)		12 Months Ended
		Dec. 31, 2023		Dec. 31, 2022
Fair Value Measurements
2025 Notes		$ 0
Contingent value rights liability		$ 359,000		$ 595,000
ISP Fund LP
Liabilities
Lock-up period		36 months		36 months
Contributed to partnership for investing		$ 300,000,000		$ 300,000
Withdrawal from investment		0
Money market funds | ISP Fund LP
Assets
Total assets measured at estimated fair value		62,900,000		25,100,000
Equity investment | ISP Fund LP
Assets
Total assets measured at estimated fair value		248,500,000		295,400,000
Private Placement Positions And Convertible Notes | ISP Fund LP
Assets
Total assets measured at estimated fair value		60,600,000		54,600,000
Recurring basis
Assets
Total assets measured at estimated fair value		705,963,000		639,488,000
Recurring basis | Money market funds
Assets
Total assets measured at estimated fair value		170,706,000		263,469,000
Recurring basis | Term Loan Investment
Assets
Total assets measured at estimated fair value		27,044,000
Recurring basis | Term Loan Investment | Armata Term Loan
Assets
Total assets measured at estimated fair value		0
Recurring basis | Equity investments and Money market funds | ISP Fund LP
Assets
Total assets measured at estimated fair value		311,812,000	[1]	320,560,000	[2]
Recurring basis | Quoted Price in Active Markets for Identical Assets, Level 1
Assets
Total assets measured at estimated fair value		503,162,000		560,546,000
Recurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 | ISP Fund LP
Assets
Total assets measured at estimated fair value	[1]	251,207,000
Recurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 | Money market funds
Assets
Total assets measured at estimated fair value		170,706,000		263,469,000
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	[2]			265,982,000
Recurring basis | Significant Other Observable Inputs, Level 2
Assets
Total assets measured at estimated fair value		35,297,000		8,059,000
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 | Term Loan Investment
Assets
Total assets measured at estimated fair value		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 Unobservable Inputs, Level 3
Assets
Total assets measured at estimated fair value		167,504,000		70,883,000
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 | Term Loan Investment
Assets
Total assets measured at estimated fair value		27,044,000
Recurring basis | Significant Unobservable Inputs, Level 3 | Equity investments and Money market funds | ISP Fund LP
Assets
Total assets measured at estimated fair value		60,605,000	[1]	54,578,000	[2]
Nonrecurring basis
Fair Value Measurements
Contingent value rights liability		359,000		595,000
Liabilities
Total liabilities at estimated fair value		427,836,000		506,259,000
Nonrecurring basis | Debt
Fair Value Measurements
2023 Notes				96,089,000
2025 Notes		200,407,000		197,807,000
2028 Notes		227,070,000		211,768,000
Total fair value of debt		427,477,000		505,664,000
Nonrecurring basis | Quoted Price in Active Markets for Identical Assets, Level 1
Fair Value Measurements
Contingent value rights liability		0		0
Liabilities
Total liabilities at estimated fair value		0		0
Nonrecurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 | Debt
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
Fair Value Measurements
2028 Notes		227,070,000
Contingent value rights liability		0		0
Total fair value of debt		427,477,000
Liabilities
Total liabilities at estimated fair value		427,477,000		505,664,000
Nonrecurring basis | Significant Other Observable Inputs, Level 2 | Debt
Fair Value Measurements
2023 Notes				96,089,000
2025 Notes		200,407,000		197,807,000
2028 Notes				211,768,000
Total fair value of debt				505,664,000
Nonrecurring basis | Significant Unobservable Inputs, Level 3
Fair Value Measurements
Contingent value rights liability		359,000		595,000
Liabilities
Total liabilities at estimated fair value		359,000		595,000
Nonrecurring basis | Significant Unobservable Inputs, Level 3 | Debt
Fair Value Measurements
2023 Notes				0
2025 Notes				0
2028 Notes		0		0
Total fair value of debt		0		0
Armata | Recurring basis | Convertible debt investment
Assets
Total assets measured at estimated fair value		51,883,000
Armata | Recurring basis | Equity investment | Common stock
Assets
Total assets measured at estimated fair value		81,249,000		31,095,000
Armata | Recurring basis | Equity investment | Warrants
Assets
Total assets measured at estimated fair value		35,297,000		8,059,000
Armata | Recurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 | Convertible debt investment
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		81,249,000		31,095,000
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 investment
Assets
Total assets measured at estimated fair value		0
Armata | Recurring basis | Significant Other Observable Inputs, Level 2 | Equity investment
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
Armata | Recurring basis | Significant Other Observable Inputs, Level 2 | Equity investment | Warrants
Assets
Total assets measured at estimated fair value		35,297,000		8,059,000
Armata | Recurring basis | Significant Unobservable Inputs, Level 3 | Convertible debt investment
Assets
Total assets measured at estimated fair value		51,883,000
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				605,000
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				605,000
Gate Neurosciences Member | Recurring basis | Convertible debt investment
Assets
Total assets measured at estimated fair value		27,972,000		15,700,000
Gate Neurosciences Member | Recurring basis | Quoted Price in Active Markets for Identical Assets, Level 1 | Convertible debt investment
Assets
Total assets measured at estimated fair value		0		0
Gate Neurosciences Member | Recurring basis | Significant Other Observable Inputs, Level 2 | Convertible debt investment
Assets
Total assets measured at estimated fair value		0		0
Gate Neurosciences Member | Recurring basis | Significant Unobservable Inputs, Level 3 | Convertible debt investment
Assets
Total assets measured at estimated fair value		$ 27,972,000		$ 15,700,000

[1] The investments held by ISP Fund LP, consisted of $248.5 million in equity investments, which included private placement positions of $60.6 million, and $62.9 million in money market funds. A certain portion of the total capital contribution of $300.0 million is no longer subject to a 36-month lock-up period from the date of such capital contribution. However, we did not elect to make a withdrawal in 2023, thereby extending the lock-up period and withdrawal elections into subsequent years.

[2] The investments held by ISP Fund LP, consisted of $295.4 million in 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 contribution of $300.0 million was subject to a 36-month lock-up period from the date of such capital contributions.