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

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)

v3.21.4
CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - Class D Preferred Units - USD ($)
Sep. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Preferred Units [Line Items]      
Units Subject to Possible Redemption 16,130,034 16,130,034 16,130,034
Units Subject to Possible Redemption, Value $ 3.10 $ 3.10  
Units Subject to Possible Redemption, Issuance Costs $ 2,958,446 $ 2,958,446 $ 2,958,446
Units Subject to Possible Redemption, Preferred Returns $ 7,895,161 $ 4,567,346 $ 515,068