Quarterly report pursuant to Section 13 or 15(d)

Stock Award Plans and Stock-Based Compensation - Employee Stock Options (Details)

v3.23.1
Stock Award Plans and Stock-Based Compensation - Employee Stock Options (Details) - USD ($)
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted (in shares) 0  
2018 Plan    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted (in shares) 0  
Options    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based payment charges $ 300,000 $ 900,000
Fair value of non-vested options $ 1,700,000  
Weighted average remaining term 1 year 1 month 2 days  
Granted (in shares) 0  
Options | 2018 Plan    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Dividend assumptions $ 0