Annual report pursuant to Section 13 and 15(d)

Royalty and Commercial Payment Purchase Agreements - Palo (Details)

v3.22.0.1
Royalty and Commercial Payment Purchase Agreements - Palo (Details)
12 Months Ended
Sep. 26, 2019
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Agreements        
Payments related to purchase of royalty rights and other commercial payment rights   $ 26,500,000 $ 1,200,000  
Long-term royalty and commercial payment receivables   69,075,000 34,575,000 $ 34,375,000
Impairment of long-term royalty receivable   0 $ 0  
Palo | Royalty Purchase Agreement        
Agreements        
Number of drug candidates 6      
Payments related to purchase of royalty rights and other commercial payment rights $ 10,000,000.0      
Long-term royalty and commercial payment receivables $ 10,000,000.0      
Impairment of long-term royalty receivable   $ 0