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

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