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

Equity Method Investments - Summary of Statements of Operation Information for the Company's Equity Method Investments (Detail)

v3.21.2
Equity Method Investments - Summary of Statements of Operation Information for the Company's Equity Method Investments (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]            
Revenue $ 7,937 $ 5,317 $ 22,596 $ 14,728 $ 21,135 $ 13,713
Net income/(loss) (46,897) (14,422) (251,038) (9,145) (19,535) (66,145)
LeoStella And X-Bow [Member]            
Schedule of Equity Method Investments [Line Items]            
Revenue 3,494 9,604 24,212 12,946 14,917 2,676
Gross margin 553 1,381 7,110 1,924 2,636 711
Net income/(loss) $ (1,590) $ 184 $ 570 $ (1,494) $ (1,873) $ (3,116)