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Stockholders' Equity - Additional Information (Detail)
12 Months Ended
Dec. 31, 2019
vote
$ / shares
shares
Dec. 31, 2018
$ / shares
shares
Stockholders Equity Note Disclosure [Line Items]    
Year of anniversary 7 years  
Class A common stock    
Stockholders Equity Note Disclosure [Line Items]    
Common stock, par or stated value per share (in dollars per share) | $ / shares $ 0.0001 $ 0.0001
Common stock, shares authorized (in shares) 1,000,000,000 1,000,000,000
Number of votes per share | vote 1  
Class B common stock    
Stockholders Equity Note Disclosure [Line Items]    
Common stock, par or stated value per share (in dollars per share) | $ / shares $ 0.0001 $ 0.0001
Common stock, shares authorized (in shares) 250,000,000 250,000,000
Number of votes per share | vote 10  
Percentage of written consent of shareholders 67.00%  
Undesignated Preferred Stock    
Stockholders Equity Note Disclosure [Line Items]    
Preferred stock, par value (in dollars per share) | $ / shares $ 0.0001  
Preferred stock, shares authorized (in shares) 100,000,000 100,000,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0