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

Related Party Transactions (Details)

v3.21.1
Related Party Transactions (Details) - Blade Urban Air Mobility [Member] - USD ($)
$ in Thousands
Jan. 20, 2021
Sep. 30, 2020
Feb. 25, 2020
Sep. 30, 2019
Related Party Transaction [Line Items]        
Ownership Interest (Percentage)     10.00%  
Blade UAM Foundation, Inc        
Related Party Transaction [Line Items]        
Amount due from related parties   $ 78    
Underhill        
Related Party Transaction [Line Items]        
Amount paid for for air charter services   $ 2,400   $ 5,400
Underhill | Melissa Tomkiel        
Related Party Transaction [Line Items]        
Ownership Interest (Percentage) 20.00% 20.00%    
Percentage of ownership interest transferred back to Underhill   50.00%