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INCOME TAXES - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Income Taxes [Line Items]
Amount of foreign net operating loss carryforwards	$ 5.2
Equity compensation	6.5
Accrued interest and penalties related to unrecognized tax benefits	0.6	$ 2.9	$ 3.0
Potential increase (decrease) in uncertain tax liabilities	0.8
Domestic
Income Taxes [Line Items]
Amount of net operating loss carryforwards	1.1
Domestic | Research Tax Credit Carryforward
Income Taxes [Line Items]
Tax credit carryforwards	0.4
State
Income Taxes [Line Items]
Amount of net operating loss carryforwards	4.4
Foreign
Income Taxes [Line Items]
Amount of net operating loss carryforwards	$ 37.0
Foreign | Research Tax Credit Carryforward
Income Taxes [Line Items]
Tax credit carryforwards		$ 1.1

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[Line Items] for Income Taxes [Table]

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign operating loss carryforwards.

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-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-6

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation.

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