Property, net (Details) - USD ($) $ in Millions	Dec. 31, 2024	Sep. 30, 2024
Property, Plant and Equipment [Abstract]
Property, at cost	$ 21.6	$ 21.4
Accumulated depreciation	(12.0)	(12.2)
Property, net	$ 9.6	$ 9.2

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
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-SubTopic 10
-Topic 360
-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
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-Paragraph 7A
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 852
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Name:	us-gaap_PropertyPlantAndEquipmentNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant