XML 121 R97.htm IDEA: XBRL DOCUMENT v3.20.4
Stockholders' Equity - Restricted Stock Units - Intrinsic Value (Details)
$ in Millions
12 Months Ended
Dec. 31, 2020
USD ($)
Restricted Stock Units  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value [Abstract]  
Intrinsic value of restricted stock units vested $ 1.4