Quarterly report pursuant to Section 13 or 15(d)

Royalty and Commercial Payment Purchase Agreements - Summary (Details)

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Royalty and Commercial Payment Purchase Agreements - Summary (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Agreements    
Long-term royalty and commercial payment receivables $ 69,075 $ 69,075
Acquisition of royalty and commercial payment rights 0  
Cash receipts for achievement of contractual milestones $ 0