Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Restricted Stock Units and Restricted Stock Awards - Share-based Compensation Expense (Details)

v3.21.2
Stockholders' Equity - Restricted Stock Units and Restricted Stock Awards - Share-based Compensation Expense (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Unvested restricted stock units/awards        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Share-based Compensation $ 0.1 $ 0.2 $ 0.2 $ 0.4