v3.6.0.2
Capitalization - Common and Preferred Stock (Detail)
 1 Months Ended 4 Months Ended
Sep. 30, 2016
Vote
Class
Dec. 31, 2016
Class
$ / shares
shares
Aug. 31, 2016
Vote
Dec. 31, 2015
$ / shares
shares
Class of Stock [Line Items]        
Number of classes of common stock | Class 2 2    
Number of votes per share of common stock | Vote     1  
Conversion of convertible Class B common stock to Class A common stock   4,200,000    
Common stock, authorized shares   1,095,000,000    
Common stock, par value (in dollars per share) | $ / shares   $ 0.000001   $ 0.000001
Preferred stock, authorized shares   100,000,000   0
Preferred stock, par value (in dollars per share) | $ / shares   $ 0.000001   $ 0.000010
Preferred stock, shares outstanding   0   0
Class A common stock        
Class of Stock [Line Items]        
Number of votes per share of common stock | Vote 1      
Common stock, authorized shares   1,000,000,000   0
Class B common stock        
Class of Stock [Line Items]        
Number of votes per share of common stock | Vote 10      
Ratio for conversion into Class A common stock 1      
Threshold percentage of aggregate outstanding common shares to trigger conversion 10.00%      
Threshold percentage vote or written consent of holders to trigger conversion 66.67%      
Common stock, authorized shares   95,000,000   130,000,000