Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Payments - Stock Options (Details)

v3.19.2
Stock-Based Payments - Stock Options (Details) - USD ($)
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Unrecognized compensation costs $ 16,300,000  
Period in which compensation costs will be recognized 2 years 10 months 24 days  
Granted and outstanding (in shares) 1,096,500  
Intrinsic value of options exercised $ 9,800 $ 800,000
Performance-based stock options    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Unrecognized compensation costs $ 900,000  
Period in which compensation costs will be recognized 3 years 3 months 18 days  
Advisor | Performance-based stock options    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Unrecognized compensation costs $ 300,000  
Period in which compensation costs will be recognized 7 years 2 months 12 days  
Granted and outstanding (in shares) 75,000