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Summary of Significant Accounting Policies - Useful Lives (Details)
12 Months Ended
Dec. 31, 2020
Computer Equipment  
Property, Plant and Equipment [Line Items]  
Useful life 3 years
Minimum | Furniture and Fixtures  
Property, Plant and Equipment [Line Items]  
Useful life 3 years
Maximum | Furniture and Fixtures  
Property, Plant and Equipment [Line Items]  
Useful life 5 years