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ACCRUED EXPENSES AND OTHER LIABILITIES - Schedule Long-Term Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Sep. 30, 2025
Payables and Accruals [Abstract]
Escrow liabilities — long-term	$ 1,250	$ 0
Accrued contingent consideration — long-term portion	9,650	3,489
Deferred tax liability — long-term	8,504	8,994
Deferred revenue — long-term	3,224	808
Other long-term liabilities	781	1,553
Other long-term liabilities	$ 23,409	$ 14,844

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Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled beyond one year or the normal operating cycle, if longer.

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