Annual report pursuant to Section 13 and 15(d)

Stock-Based Payments - 2016 Stock Incentive Plan (Details)

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Stock-Based Payments - 2016 Stock Incentive Plan (Details) - shares
12 Months Ended
Jun. 17, 2016
Dec. 31, 2016
Stock options    
Stock-based payments    
Vesting period   4 years
Term of award   10 years
Stock options | Vesting on one year anniversary of vesting commencement date    
Stock-based payments    
Vesting period   1 year
Vesting (as a percent)   25.00%
Stock options | Vesting ratably on a monthly basis    
Stock-based payments    
Vesting period   3 years
Vesting (as a percent)   75.00%
Performance-based stock options | Maximum    
Stock-based payments    
Vesting period   6 years
2016 Plan    
Stock-based payments    
Common stock reserved for issuance of awards (in shares) 3,218,742  
Increase in number of shares of common stock reserved for issuance of awards on the first day of each calendar year (in shares) 6,000,000  
Increase in number of shares of common stock reserved for issuance of awards on the first day of each calendar year, as a percentage of outstanding shares 4.00%  
Common stock available for future issuance (in shares) 2,669,252