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INTANGIBLE ASSETS (Tables)
 9 Months Ended
Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of gross carrying amounts and net book values of intangible assets and goodwill
The following table reflects the gross carrying amounts and net book values of intangible assets as of September 30, 2021 and December 31, 2020 (dollar amounts in thousands): 

 September 30, 2021December 31, 2020
Remaining Useful Life
 (In years)		Gross Carrying AmountAccumulated AmortizationNet Book ValueGross Carrying AmountAccumulated AmortizationNet Book Value
Products rights:
INDOCIN10.6$154,100 $(17,443)$136,657 $154,100 $(7,812)$146,288 
SPRIX5.639,000 (7,568)31,432 39,000 (3,389)35,611 
CAMBIA1.351,360 (41,422)9,938 51,360 (36,163)15,197 
Zipsor
Less than 1 year
27,250 (26,134)1,116 27,250 (24,381)2,869 
Oxaydo—300 (300)— 300 (183)117 
Total Intangible Assets$272,010 $(92,867)$179,143 $272,010 $(71,928)$200,082 
Schedule of the future amortization expenses of intangible assets
The following table reflects future amortization expense the Company expects for its intangible assets (in thousands): 
Year Ending December 31,Estimated Amortization Expense
2021 (remainder)$7,176 
202226,895 
202318,412 
202418,413 
202518,413 
Thereafter89,834 
Total$179,143