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Commitments and Contingencies (Details)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Jun. 30, 2019
Oct. 31, 2018
Commitments and Contingencies [Line Items]              
Rentable square feet (in Square Meters) | m²       48,651 7,561 6,536 62,748
Lease expiry year       11 years      
Lease extend term   two          
Lease consecutive periods   5 years          
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]   lease expense lease expense        
Operating lease expense   $ 2.3 $ 2.1        
Rental income   1.3 0.0        
Commercial batch release amount       $ 20.0      
Chief Financial Officer [Member]              
Commitments and Contingencies [Line Items]              
Executive termination obligations   0.4          
Paragraph Four Certification Notice Letter [Member] | Prepaid Expenses and Other Current Assets [Member]              
Commitments and Contingencies [Line Items]              
Legal costs   2.3          
Mayne Pharma Agreement [Member]              
Commitments and Contingencies [Line Items]              
Acquisition of net working capital     $ 12.1        
Working capital amounts   5.5          
Mayne Pharma Agreement [Member] | Minimum [Member]              
Commitments and Contingencies [Line Items]              
Incremental accrual for net working capital $ 3.5            
Mayne Pharma Agreement [Member] | Maximum [Member]              
Commitments and Contingencies [Line Items]              
Incremental accrual for net working capital $ 5.5            
Population Council License Agreement [Member]              
Commitments and Contingencies [Line Items]              
Milestone payment         $ 20.0    
Population Council License Agreement [Member] | Annoveras [Member]              
Commitments and Contingencies [Line Items]              
Aggregate of milestone payments   $ 40.0