Segment Information and Revenue from Significant Customers - Additional Information (Detail)	12 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Revenue, Major Customer [Line Items]
Minimum Percentage Of Revenue from Significant Customer	10.00%	10.00%	10.00%

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.

No definition available.

Name:	us-gaap_EntityWideRevenueMajorCustomerLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration