Annual report pursuant to Section 13 and 15(d)

Defined Contribution Plan - (Details)

v3.20.4
Defined Contribution Plan - (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Defined Contribution Plan Disclosure [Line Items]      
Employer match (as a percent) 100.00%    
Plan Compensation (as a percent) for 100% 1.00%    
Employer match (as a percent) 50.00%    
Contribution made by the company $ 0.5 $ 0.5 $ 0.4
Minimum      
Defined Contribution Plan Disclosure [Line Items]      
Plan Compensation (as a percent) for 50% 1.00%    
Maximum      
Defined Contribution Plan Disclosure [Line Items]      
Plan Compensation (as a percent) for 50% 6.00%