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Restructuring and Severance Charges - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Apr. 16, 2021
Feb. 04, 2021
Jun. 30, 2021
Dec. 31, 2021
Restructuring Charges        
Accelerated vesting expense     $ 0.7  
Chief Medical Officer        
Restructuring Charges        
Accelerated vesting expense   $ 0.7    
Chief Financial Officer        
Restructuring Charges        
Accelerated vesting expense $ 0.9      
Extension of exercise period 24 months      
Accelerated cost     $ 0.4  
Accrued severance compensation       $ 0.9