Annual report pursuant to Section 13 and 15(d)

Common Stock, Stock-Based Awards and Warrants - Restricted Stock Units Narrative (Details)

v3.19.1
Common Stock, Stock-Based Awards and Warrants - Restricted Stock Units Narrative (Details) - Restricted stock units - shares
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock option term (in years) 4 years  
Percent of stock options vesting on the anniversary of commencement (as a percent) 25.00%  
Non-options granted (in shares) 3,392,000  
Board of Directors    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting period 12 months 12 months
Non-options granted (in shares) 0 268,000
Executive Chairman    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Percent of stock options vesting on the anniversary of commencement (as a percent) 25.00%  
Employees Excluding Board Of Directors    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock option term (in years)   4 years
Non-options granted (in shares) 3,391,665 3,643,000
RSUs, March 27, 2020    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Percent of stock options vesting on the anniversary of commencement (as a percent) 50.00%  
RSUs, March 27, 2021    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Percent of stock options vesting on the anniversary of commencement (as a percent) 25.00%  
RSUs, March 27, 2022    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Percent of stock options vesting on the anniversary of commencement (as a percent) 25.00%