Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Contingent Consideration (Details)

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Commitments and Contingencies - Contingent Consideration (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Jan. 11, 2024
Jun. 21, 2023
Mar. 29, 2023
Oct. 06, 2021
Jun. 30, 2023
Mar. 31, 2024
Sep. 30, 2024
Sep. 30, 2023
Jun. 03, 2024
Apr. 03, 2024
Dec. 31, 2023
Commitments And Contingencies                      
Contingent consideration under RPAs, AAAs and CPPAs             $ 4,000,000       $ 7,000,000
Exarafenib milestone contingent consideration             3,125,000        
Payments of consideration under RPAs, AAAs and CPPAs             37,000,000 $ 14,650,000      
Changes in estimated fair value of contingent consideration               $ 75,000      
Short-term royalty and commercial payment receivables             12,682,000       14,215,000
Long-term royalty and commercial payment receivables             54,207,000       57,952,000
Assignment and Assumption Agreement and Royalty Purchase Agreement | LadRx                      
Commitments And Contingencies                      
Contingent consideration under RPAs, AAAs and CPPAs             1,000,000.0        
Payments of consideration under RPAs, AAAs and CPPAs   $ 5,000,000.0                  
Long-term royalty and commercial payment receivables             1,000,000.0        
Assignment and Assumption Agreement and Royalty Purchase Agreement | LadRx | Regulatory milestones                      
Commitments And Contingencies                      
Contingent consideration under RPAs, AAAs and CPPAs   $ 1,000,000.0       $ 0 0   $ 0   1,000,000.0
Payments of consideration under RPAs, AAAs and CPPAs $ 1,000,000.0         1,000,000.0 1,000,000.0        
Commercial Payment Purchase Agreement | Aptevo                      
Commitments And Contingencies                      
Contingent consideration under RPAs, AAAs and CPPAs     $ 50,000                
Payments of consideration under RPAs, AAAs and CPPAs     $ 9,600,000   $ 50,000            
Short-term royalty and commercial payment receivables             2,200,000       2,000,000.0
Commercial Payment Purchase Agreement | Affitech                      
Commitments And Contingencies                      
Contingent consideration under RPAs, AAAs and CPPAs           0          
Payments of consideration under RPAs, AAAs and CPPAs       $ 6,000,000.0   6,000,000.0          
Commercial Payment Purchase Agreement | Affitech | Regulatory milestones                      
Commitments And Contingencies                      
Contingent consideration under RPAs, AAAs and CPPAs       $ 8,000,000.0              
Commercial Payment Purchase Agreement | Affitech | Sales-based milestones, first and second                      
Commitments And Contingencies                      
Contingent consideration under RPAs, AAAs and CPPAs           $ 0         6,000,000.0
Long-term royalty and commercial payment receivables                     $ 6,000,000.0
Commercial Payment Purchase Agreement | Affitech | Sales-based milestones, third                      
Commitments And Contingencies                      
Contingent consideration under RPAs, AAAs and CPPAs             3,000,000.0        
Short-term royalty and commercial payment receivables             3,000,000.0        
CVR Agreement | Kinnate CVR holders                      
Commitments And Contingencies                      
Exarafenib milestone contingent consideration             $ 3,100,000     $ 2,900,000