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Intangible Asset (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Gross carrying amount	$ 521,170	$ 521,170
Accumulated amortization	(202,061)	(185,266)
Intangible assets, net	319,109	335,904
Nucynta Products
Gross carrying amount	521,170	521,170	$ 154,089
Accumulated amortization	(202,061)	(185,266)	(124,586)
Intangible assets, net	$ 319,109	$ 335,904	$ 29,503

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 340
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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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-Name Accounting Standards Codification
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