v3.21.1
Quarterly Financial Information (Parenthetical) (Detail) - $ / shares
Dec. 31, 2020
Sep. 30, 2020
Preferred stock par value $ 0.0001 $ 0.0001
Common stock par value 0.0001  
Common Class A [Member]    
Common stock par value 0.0001 0.0001
Common Class B [Member]    
Common stock par value $ 0.0001 0.0001
Common Class F [Member]    
Common stock par value   $ 0.0001