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Liability Related to the Revenue Interest Purchase Agreement (Tables)
3 Months Ended
Mar. 31, 2021
Liability Related to the Revenue Interest Purchase Agreement  
Summary of Revenue Interest Liability Activity During the Period
The following table summarizes the revenue interest liability activity during the three months ended March 31, 2021:
(in thousands)
Total revenue interest liability at December 31, 2020$176,604 
Interest expense recognized4,925 
Revenue Interests payments(573)
Total revenue interest liability at March 31, 2021$180,956