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Intangible Royalty Assets, Net - Narrative (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
DPP-IV patents | Revenue Benchmark | Individual Licensees Concentration List      
Finite-Lived Intangible Assets [Line Items]      
Individual licensees exceeding 10% or more of revenue (as a percent) 90.00% 93.00% 94.00%