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Summary of Significant Accounting Policies - Narrative (Details)
12 Months Ended
Dec. 31, 2019
Furniture and fixtures  
Property, Plant and Equipment [Line Items]  
Useful life (in years) 10 years
Computer equipment  
Property, Plant and Equipment [Line Items]  
Useful life (in years) 3 years
Software  
Property, Plant and Equipment [Line Items]  
Useful life (in years) 3 years