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INCOME TAXES - Reconciliation of The Federal Corporate Income Tax Rate and The Effective Tax Rate (Details)	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Statutory income tax rate	21.00%	21.00%	21.00%
Effect of foreign operations	0.30%	(2.00%)	0.20%
State taxes, net of federal benefit	5.50%	8.00%	3.20%
Effect of other permanent differences	2.20%	(32.80%)	(0.80%)
Research and Experimentation and other federal tax credits	(0.30%)	2.90%	0.20%
Effect of tax contingencies	(0.50%)	3.70%	0.10%
Change in valuation allowances	5.40%	(57.40%)	(8.70%)
Other	0.90%	8.70%	1.00%
Effective income tax rate	34.50%	(47.90%)	16.20%

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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