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License Agreements (Details) - USD ($)
$ in Millions
1 Months Ended
Apr. 12, 2021
Apr. 30, 2020
Oct. 31, 2018
Oct. 31, 2017
Feb. 29, 2016
Dec. 07, 2021
Milestone amount payable           $ 2.5
Cedars-Sinai Medical Center            
License agreement term   10 years        
License fee   $ 0.3        
Patent prosecution fees   0.1        
License Agreement 2014 | Maximum | Neos Therapeutics, Inc.            
Lump sum non-refundable license fee         $ 1.0  
License Agreement 2017 | Maximum | Neos Therapeutics, Inc.            
Lump sum non-refundable license fee       $ 1.0    
NeuRx License, Royalty Bearing License Agreement            
Payments for license agreement     $ 0.2      
Payments for contingent consideration on license agreement   $ 0.3        
Rumpus            
Contingent consideration $ 67.5          
Cash transferred 1.5          
Payment of aggregated fees 0.6          
In-process R&D | Rumpus            
Contingent consideration 67.5          
Cash transferred 1.5          
Payment of aggregated fees 0.6          
In-process R&D | Rumpus | Maximum            
Contingent consideration $ 67.5