INCOME TAXES - Effective income tax rate (Details)	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Federal statutory income tax rate	21.00%	21.00%
State and local income taxes, net of Federal tax benefit, if applicable	3.20%	3.30%
Goodwill	0.00%	(3.50%)
Impact of foreign operations	(1.20%)	(0.30%)
Sale of Israeli businesses	0	(0.008)
Fines and penalties	(4.60%)	0.00%
Other	(0.80%)	1.10%
Valuation allowance changes	(0.90%)	(5.20%)
Effective income tax rate	16.70%	15.60%