Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Summary of Stock Option Exercises (Details)

v3.20.4
Stock-Based Compensation - Summary of Stock Option Exercises (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share-based Payment Arrangement [Abstract]      
Total intrinsic value of stock options exercised $ 0.0 $ 0.0  
Cash proceeds received from options exercised $ 0.0 $ 0.1 $ 0.8