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

Summary Of Significant Accounting Policies - Summary of property and equipment net (Detail)

v3.21.2
Summary Of Significant Accounting Policies - Summary of property and equipment net (Detail)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Useful Life   1 year 6 months
Satellites    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Useful Life 3 years  
Computer equipment and software    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Useful Life 3 years  
Ground station equipment    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Useful Life 2 years  
Office furniture and fixtures    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Useful Life 5 years  
Leasehold Improvements    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Useful Life shorter of useful life or remaining lease term  
Maximum [Member] | Site and other equipment    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Useful Life 5 years  
Minimum [Member] | Site and other equipment    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Useful Life 3 years