Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Narrative) (Details)

v3.20.2
Stock-Based Compensation (Narrative) (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2020
shares
Sep. 30, 2019
shares
Sep. 30, 2020
numberOfInstallments
shares
Sep. 30, 2019
shares
Dec. 31, 2019
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of additional shares authorized 500,000        
Number of shares authorized 3,730,320   3,730,320    
Stock options | 2007 Stock Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Options granted (in shares) 457,692 14,000 457,692 39,000  
Number of equal installments | numberOfInstallments     3    
Award vesting period     3 years    
Award term     7 years    
Restricted stock awards and restricted stock units | 2007 Stock Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Equity instruments other than options, granted (in shares) 511,392 25,900 564,992 222,588  
Restricted stock awards and restricted stock units | 2018 Performance Stock Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Equity instruments other than options, granted (in shares)       98,492  
Performance stock units | 2007 Stock Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock units outstanding (in shares) 0   0    
Performance stock units | 2018 Performance Stock Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting rights, percentage       100.00%  
Equity instruments other options, outstanding (in shares)         40,599