Quarterly report pursuant to Section 13 or 15(d)

Licenses Acquired (Narrative) (Details)

v3.21.2
Licenses Acquired (Narrative) (Details)
 3 Months Ended 6 Months Ended
Jun. 29, 2021
USD ($)
Apr. 01, 2021
USD ($)
item
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Research and Development Arrangement, Contract to Perform for Others [Line Items]            
Research and development - licenses acquired     $ 11,003,000 $ 1,570,000 $ 11,129,000 $ 1,820,000
Licensing Agreements [Member]            
Research and Development Arrangement, Contract to Perform for Others [Line Items]            
Research and development - licenses acquired     11,003,000 1,570,000 11,129,000 1,820,000
Journey [Member] | Licensing Agreements [Member]            
Research and Development Arrangement, Contract to Perform for Others [Line Items]            
Research and development - licenses acquired     10,000,000   10,000,000  
Journey [Member] | Licensing Agreements [Member] | Dr. Reddy's Laboratories, Ltd [Member]            
Research and Development Arrangement, Contract to Perform for Others [Line Items]            
Upfront fees payment $ 10,000,000.0          
Payments of milestones 2,000,000.0          
Maintenance fees 24,000,000.0          
Journey [Member] | Licensing Agreements [Member] | Dr. Reddy's Laboratories, Ltd [Member] | Achievement of Certain clinical Development, Regulatory and First Commercial Sale milestones [Member]            
Research and Development Arrangement, Contract to Perform for Others [Line Items]            
Payments of milestones 163,000,000.0          
Journey [Member] | Licensing Agreements [Member] | Dr. Reddy's Laboratories, Ltd [Member] | Payable 90 days Following the Effective Date [Member]            
Research and Development Arrangement, Contract to Perform for Others [Line Items]            
Upfront fees payment $ 8,000,000.0          
Mustang [Member] | Licensing Agreements [Member]            
Research and Development Arrangement, Contract to Perform for Others [Line Items]            
Research and development - licenses acquired     1,000,000 1,300,000 1,000,000 1,550,000
Mustang [Member] | Licensing Agreements [Member] | Mayo Clinic [Member]            
Research and Development Arrangement, Contract to Perform for Others [Line Items]            
Upfront fees payment   $ 800,000        
Research and development - licenses acquired     $ 750,000 $ 0 $ 750,000 $ 0
Annual Maintenance Fee Payable   $ 25,000        
Number of development milestones | item   11        
Mustang [Member] | Licensing Agreements [Member] | Maximum [Member] | Mayo Clinic [Member] | Achievement of Certain clinical Development, Regulatory and First Commercial Sale milestones [Member]            
Research and Development Arrangement, Contract to Perform for Others [Line Items]            
Payments of milestones   $ 92,600,000