General form of registration statement for all companies including face-amount certificate companies

Share-Based Compensation - Additional Information (Details)

v3.21.4
Share-Based Compensation - Additional Information (Details) - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted-average period to recognize unrecognized compensation expense 2 years 4 months 24 days 1 year 8 months 8 days    
Performance Based units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation expense $ 0 $ 0    
Class C Preferred Unit | Time-Based Unit        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation expense   67,475 $ 94,042 $ 67,050
Unrecognized compensation expense   1,198,550    
Subclass B-1        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation expense   380,000 $ 380,000 $ 380,000
Unrecognized compensation expense $ 4,364,766 $ 1,482,228