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Intangible Royalty Assets, Net | 12 Months Ended
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Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Royalty Assets, Net | Intangible Royalty Assets, Net As of December 31, 2022, the intangible royalty assets were fully amortized as our royalties on Januvia and Janumet expired in the first quarter of 2022. Our royalties on the other DPP-IV products have also substantially ended. As of December 31, 2021, the cost, accumulated amortization and net carrying value of our intangible royalty assets are summarized as below (in thousands):
As of December 31, 2021 | Cost |  | Accumulated Amortization |  | Net Carrying Value
DPP-IV patents | $ | 606,216 |  |  | $ | 600,546 |  |  | $ | 5,670 |
Total intangible royalty assets | $ | 606,216 |  |  | $ | 600,546 |  |  | $ | 5,670 |
Revenue from intangible assets is tied to underlying patent protected sales of DPP-IV products of various licensees. Such revenue is earned from sales occurring primarily in the United States and Europe; however, we do not have the ability to disaggregate such revenue from licensees based on the geography of the underlying sales as this information may not be provided to us by marketers. Individual licensees exceeding 10% or more of revenue from intangible royalty assets accounted for 90%, 86% and 97% of revenues from intangible royalty assets in 2022, 2021 and 2020, respectively.

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -URI https://asc.fasb.org/subtopic&trid=2144471 + Details
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