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Intangible Royalty Assets, Net (Tables)
6 Months Ended
Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Intangible Royalty Interests
The following tables summarize the cost, accumulated amortization and net carrying value of our intangible royalty assets as of June 30, 2022 and December 31, 2021 (in thousands):
As of June 30, 2022CostAccumulated AmortizationNet Carrying Value
DPP-IV patents$606,216 $606,216 $— 
Total intangible royalty assets$606,216 $606,216 $— 
As of December 31, 2021CostAccumulated AmortizationNet Carrying Value
DPP-IV patents$606,216 $600,546 $5,670 
Total intangible royalty assets$606,216 $600,546 $5,670