INTANGIBLE ASSETS - Summary of Gross Carrying Amounts and Net Book Values of Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Intangible assets
Gross Carrying Amount	$ 192,598	$ 472,236
Accumulated Amortization	(86,897)	(81,265)
Impairment		(279,639)
Total	$ 105,701	111,332
ROLVEDON | Product Rights
Intangible assets
Remaining Useful Life (In years)	9 years 3 months 18 days
Gross Carrying Amount	$ 63,405	220,500
Accumulated Amortization	(6,787)	(5,270)
Impairment		(157,095)
Total	$ 56,618	58,135
INDOCIN | Product Rights
Intangible assets
Remaining Useful Life (In years)	1 year 9 months 18 days
Gross Carrying Amount	$ 65,606	154,100
Accumulated Amortization	(47,413)	(44,814)
Impairment		(88,494)
Total	$ 18,193	20,792
Sympazan | Product Rights
Intangible assets
Remaining Useful Life (In years)	10 years 7 months 6 days
Gross Carrying Amount	$ 14,550	14,550
Accumulated Amortization	(1,718)	(1,415)
Impairment		0
Total	$ 12,832	13,135
Otrexup | Product Rights
Intangible assets
Remaining Useful Life (In years)	5 years 8 months 12 days
Gross Carrying Amount	$ 16,364	44,086
Accumulated Amortization	(10,364)	(10,103)
Impairment		(27,723)
Total	$ 6,000	6,260
SPRIX | Product Rights
Intangible assets
Remaining Useful Life (In years)	3 years 1 month 6 days
Gross Carrying Amount	$ 32,673	39,000
Accumulated Amortization	(20,615)	(19,663)
Impairment		(6,327)
Total	$ 12,058	$ 13,010