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Description of Business - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Feb. 10, 2020
Feb. 09, 2020
Mar. 31, 2020
Dec. 31, 2019
Organization Consolidation And Presentation Of Financial Statements [Line Items]        
Offering price per share     $ 0.01 $ 0.01
Preferred Stock        
Organization Consolidation And Presentation Of Financial Statements [Line Items]        
Conversion of convertible preferred stock into common stock 226,344,686 98,406,823    
Limited Common Stock        
Organization Consolidation And Presentation Of Financial Statements [Line Items]        
Offering price per share     $ 0.01 $ 0.01
Conversion of convertible preferred stock into common stock   13,164,193    
Common Stock        
Organization Consolidation And Presentation Of Financial Statements [Line Items]        
Issued and sold shares 1,782,352   13,664,704  
Net proceeds from issuance of common stock $ 209.6      
Conversion of convertible preferred stock into common stock 30,278,832   30,278,832  
Common Stock | IPO        
Organization Consolidation And Presentation Of Financial Statements [Line Items]        
Issued and sold shares 11,882,352      
Offering price per share $ 17.00