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

Organization and Business (Detail)

v3.21.2
Organization and Business (Detail)
$ in Millions
Jun. 12, 2020
USD ($)
Dec. 31, 2017
USD ($)
Sep. 30, 2021
SUBSIDIARY
Satellites
Dec. 31, 2020
Dec. 31, 2018
Organization consolidation and presentation of financial statements [Line Items]          
Number Of Satellites | Satellites     6    
Number Of Subsidiaries | SUBSIDIARY     2    
Spaceflight Inc [Member]          
Organization consolidation and presentation of financial statements [Line Items]          
Disposal Group, Including Discontinued Operation, Consideration $ 31.6        
MY Space Co. Ltd [Member]          
Organization consolidation and presentation of financial statements [Line Items]          
Equity Method Investment, Ownership Percentage 100.00%        
Proceeds from Sale of Equity Method Investments $ 31.6        
Equity Method Investments Percentage Disposed Off 100.00%        
X-Bow [Member]          
Organization consolidation and presentation of financial statements [Line Items]          
Equity Method Investment, Ownership Percentage     17.90% 20.60%  
Payments to Acquire Equity Method Investments   $ 13.5      
LeoStella [Member]          
Organization consolidation and presentation of financial statements [Line Items]          
Equity Method Investment, Ownership Percentage     50.00%   50.00%