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Intangible Royalty Assets, Net (Tables) | 12 Months Ended
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Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Intangible Royalty Interests | 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 |

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