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

Goodwill and Intangible Assets - Summary of Intangible Assets (Detail)

v3.21.2
Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross $ 10,910 $ 10,903 $ 10,903
Finite-Lived Intangible Assets, Accumulated Amortization (8,093) (7,072) (5,721)
Finite-Lived Intangible Assets, Net 2,817 3,831 5,182
Customer Relationships [Member]      
Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross 6,530 6,530 6,530
Finite-Lived Intangible Assets, Accumulated Amortization (3,910) (3,489) (2,927)
Finite-Lived Intangible Assets, Net 2,620 3,041 3,603
Distribution Rights [Member]      
Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross 326 326 326
Finite-Lived Intangible Assets, Accumulated Amortization (326) (326) (326)
Finite-Lived Intangible Assets, Net 0 0  
Internet Domain Names [Member]      
Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross 4,054 4,047 4,047
Finite-Lived Intangible Assets, Accumulated Amortization (3,857) (3,257) (2,468)
Finite-Lived Intangible Assets, Net $ 197 $ 790 $ 1,579