Annual report pursuant to Section 13 and 15(d)

Equity Transactions - Restricted Stock Units Narrative (Details)

v3.20.1
Equity Transactions - Restricted Stock Units Narrative (Details) - shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Restricted stock units    
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) 29,000  
Board of Directors | Restricted stock units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting period 12 months  
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 | Restricted stock units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non-options granted (in shares) 29,333 135,667
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%