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

Stock-Based Compensation - Award Modification (Details)

v3.21.1
Stock-Based Compensation - Award Modification (Details) - Blade Urban Air Mobility [Member] - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 6 Months Ended 12 Months Ended
Jul. 31, 2020
Jun. 30, 2020
Mar. 31, 2021
Sep. 30, 2020
Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Modification on options to purchase shares of common stock 11,080,193        
Additional stock-based compensation expense $ 321   $ 0    
Exercise price $ 0.13   $ 0.24 $ 0.48 $ 0.38
Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Exercise price   $ 0.22      
Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Exercise price   $ 0.48