SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

9 Months Ended

Sep. 30, 2021

Accounting Policies [Abstract]

Disaggregation of revenue

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2021		2020		2021		2020
	(In thousands)
Paid-up revenue agreements	$	1,100	$	19,385	$	23,110	$	24,477
Recurring Revenue Agreements		482		81		1,675		922
Total revenue	$	1,582	$	19,466	$	24,785	$	25,399

Schedule of equity securities

Security Type	Cost		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value
	(In thousands)
September 30, 2021:
Equity securities - Life Sciences Portfolio (Note 3)	$	62,042	$	288,508	$	(1,812	)	$	348,738
Equity securities - other equity		35,178		3,289		(85	)		38,382
Total	$	97,220	$	291,797	$	(1,897	)	$	387,120
December 31, 2020:
Equity securities - Life Sciences Portfolio (Note 3)	$	32,765	$	72,689	$	(583	)	$	104,871
Equity securities - other equity		4,086		1,410		(1,264	)		4,232
Total	$	36,851	$	74,099	$	(1,847	)	$	109,103