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

X

- Definition

Face amount or stated value per share of common stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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- Definition

Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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