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Summary of Significant Accounting Policies - Redeemable Convertible Preferred Stock Assumptions (Details) - Redeemable convertible preferred stock outstanding
12 Months Ended
Dec. 31, 2020
Subsidiary, Sale of Stock [Line Items]  
Expected life (years) 1 year 8 months 12 days
Expected volatility  
Subsidiary, Sale of Stock [Line Items]  
Measurement input, percent 0.68
Risk-free interest rate  
Subsidiary, Sale of Stock [Line Items]  
Measurement input, percent 0.001
Expected dividend rate  
Subsidiary, Sale of Stock [Line Items]  
Measurement input, percent 0