INTANGIBLE ASSETS AND GOODWILL - Summary of Gross Carrying Amounts and Net Book Values of Intangible Assets and Goodwill (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Intangible assets
Gross Carrying Amount	$ 485,736	$ 251,736
Accumulated Amortization	(76,492)	(53,740)
Impairment	(238,831)
Total	$ 170,413	197,996
INDOCIN | Product Rights
Intangible assets
Remaining Useful Life (In years)	8 years 7 months 6 days
Gross Carrying Amount	$ 154,100	154,100
Accumulated Amortization	(43,126)	(33,495)
Impairment	(52,463)
Total	$ 58,511	120,605
ROLVEDON | Product Rights
Intangible assets
Remaining Useful Life (In years)	9 years 9 months 18 days
Gross Carrying Amount	$ 234,000	0
Accumulated Amortization	(3,900)	0
Impairment	(157,095)
Total	$ 73,005	0
Otrexup | Product Rights
Intangible assets
Remaining Useful Life (In years)	6 years 2 months 12 days
Gross Carrying Amount	$ 44,086	44,086
Accumulated Amortization	(9,644)	(5,511)
Impairment	(22,946)
Total	$ 11,496	38,575
Sympazan | Product Rights
Intangible assets
Remaining Useful Life (In years)	11 years 1 month 6 days
Gross Carrying Amount	$ 14,550	14,550
Accumulated Amortization	(1,111)	(202)
Impairment	0
Total	$ 13,439	14,348
SPRIX | Product Rights
Intangible assets
Remaining Useful Life (In years)	3 years 7 months 6 days
Gross Carrying Amount	$ 39,000	39,000
Accumulated Amortization	(18,711)	(14,532)
Impairment	(6,327)
Total	$ 13,962	$ 24,468