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

Stockholders' Equity - Attributes of Convertible Preferred Stock (Details)

v3.21.1
Stockholders' Equity - Attributes of Convertible Preferred Stock (Details) - USD ($)
 7 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2020
Mar. 31, 2021
Dec. 31, 2020
Sep. 30, 2019
Class of Stock [Line Items]          
Purchase price       $ 1.50  
Gross proceeds from IPO for automatic conversion of preferred stock $ 269,500,000        
Blade Urban Air Mobility [Member]          
Class of Stock [Line Items]          
Purchase price   $ 0.13 $ 7.28    
Number of shares issuable upon conversion   22,116,811     22,116,811
Blade Urban Air Mobility [Member] | Preferred stock - Series Seed          
Class of Stock [Line Items]          
Liquidation preferences per share   $ 1.00      
Preferred dividend per share   0.08      
Preferred stock, conversion price   1.00      
Blade Urban Air Mobility [Member] | Common Stock          
Class of Stock [Line Items]          
Purchase price   $ 8.7597      
Gross proceeds from IPO for automatic conversion of preferred stock   $ 50,000,000      
Blade Urban Air Mobility [Member] | Preferred stock - Series A          
Class of Stock [Line Items]          
Liquidation preferences per share   $ 1.6323      
Preferred dividend per share   0.13      
Preferred stock, conversion price   1.6323      
Blade Urban Air Mobility [Member] | Preferred stock - Series B          
Class of Stock [Line Items]          
Liquidation preferences per share   2.9199      
Preferred dividend per share   0.2336      
Preferred stock, conversion price   $ 2.9199      
Blade Urban Air Mobility [Member] | Minimum          
Class of Stock [Line Items]          
Purchase price         $ 0.44