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Restructuring - Additional Information (Details)
1 Months Ended 3 Months Ended
Jun. 30, 2019
Employee
Jun. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
Restructuring Cost And Reserve [Line Items]      
One-time severance-related charge   $ 1,500,000  
Corporate restructuring, reduction of full-time workforce percentage 60.00%    
Corporate restructuring, reduction of full-time workforce employees | Employee 48    
One Time Employee Severance      
Restructuring Cost And Reserve [Line Items]      
Remaining liability     $ 0
General and Administrative      
Restructuring Cost And Reserve [Line Items]      
One-time severance-related charge   1,000,000  
Research and Development      
Restructuring Cost And Reserve [Line Items]      
One-time severance-related charge   $ 500,000