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Summary of Significant Accounting Policies - Consolidation and Property and Equipment - Additional Information (Detail)	12 Months Ended
	Sep. 30, 2019
Property and Equipment, Net [Line Items]
Property and equipment, Depreciation methods	straight-line method
Minimum [Member]
Property and Equipment, Net [Line Items]
Estimated useful life of assets	3 years
Maximum [Member]
Property and Equipment, Net [Line Items]
Estimated useful life of assets	10 years

X

- Definition

Description of the methodology for computing depreciation for classes of depreciable assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

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