Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation and Employee Benefit Plans - ESPP (Details)

v3.19.3.a.u2
Stock-Based Compensation and Employee Benefit Plans - ESPP (Details) - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
ESPP [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock Issued During Period, Shares, Employee Stock Purchase Plans 248,067    
Share-based Compensation Arrangement by Share-based Payment Award, Per Share Weighted Average Price of Shares Purchased $ 16.57    
Employee Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Dividend yield 0.00% 0.00% 0.00%
Expected life (in years) 6 months 6 months  
Minimum [Member] | Employee Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted-average grant date fair value per share $ 5.48    
Risk-free interest rate 1.59%    
Volatility 40.47%    
Maximum [Member] | Employee Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted-average grant date fair value per share $ 6.61    
Risk-free interest rate 2.43%    
Volatility 43.14%