RETIREMENT PLANS - FAIR VALUE (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Pension plan assets at the fair value
Fair value measurements	$ 13,094	$ 11,982
Quoted Prices in Active Markets (Level 1)
Pension plan assets at the fair value
Fair value measurements	12,523	11,982
Significant Other Observable Inputs (Level 2)
Pension plan assets at the fair value
Fair value measurements	0	0
Significant Unobservable Inputs (Level 3)
Pension plan assets at the fair value
Fair value measurements	571	0	$ 0
Cash
Pension plan assets at the fair value
Fair value measurements	531	263
Cash | Quoted Prices in Active Markets (Level 1)
Pension plan assets at the fair value
Fair value measurements	531	263
Cash | Significant Other Observable Inputs (Level 2)
Pension plan assets at the fair value
Fair value measurements	0	0
Cash | Significant Unobservable Inputs (Level 3)
Pension plan assets at the fair value
Fair value measurements	0	0
U.S. treasury and government securities
Pension plan assets at the fair value
Fair value measurements	516	709
U.S. treasury and government securities | Quoted Prices in Active Markets (Level 1)
Pension plan assets at the fair value
Fair value measurements	516	709
U.S. treasury and government securities | Significant Other Observable Inputs (Level 2)
Pension plan assets at the fair value
Fair value measurements	0	0
U.S. treasury and government securities | Significant Unobservable Inputs (Level 3)
Pension plan assets at the fair value
Fair value measurements	0	0
Fixed income exchange-traded funds
Pension plan assets at the fair value
Fair value measurements	1,872	3,102
Fixed income exchange-traded funds | Quoted Prices in Active Markets (Level 1)
Pension plan assets at the fair value
Fair value measurements	1,872	3,102
Fixed income exchange-traded funds | Significant Other Observable Inputs (Level 2)
Pension plan assets at the fair value
Fair value measurements	0	0
Fixed income exchange-traded funds | Significant Unobservable Inputs (Level 3)
Pension plan assets at the fair value
Fair value measurements	0	0
Preferred securities
Pension plan assets at the fair value
Fair value measurements	88	47
Preferred securities | Quoted Prices in Active Markets (Level 1)
Pension plan assets at the fair value
Fair value measurements	88	47
Preferred securities | Significant Other Observable Inputs (Level 2)
Pension plan assets at the fair value
Fair value measurements	0	0
Preferred securities | Significant Unobservable Inputs (Level 3)
Pension plan assets at the fair value
Fair value measurements	0	0
Equities
Pension plan assets at the fair value
Fair value measurements	9,516	7,861
Equities | Quoted Prices in Active Markets (Level 1)
Pension plan assets at the fair value
Fair value measurements	9,516	7,861
Equities | Significant Other Observable Inputs (Level 2)
Pension plan assets at the fair value
Fair value measurements	0	0
Equities | Significant Unobservable Inputs (Level 3)
Pension plan assets at the fair value
Fair value measurements	0	$ 0
Note receivable from an unrelated private company
Pension plan assets at the fair value
Fair value measurements	571
Note receivable from an unrelated private company | Quoted Prices in Active Markets (Level 1)
Pension plan assets at the fair value
Fair value measurements	0
Note receivable from an unrelated private company | Significant Other Observable Inputs (Level 2)
Pension plan assets at the fair value
Fair value measurements	0
Note receivable from an unrelated private company | Significant Unobservable Inputs (Level 3)
Pension plan assets at the fair value
Fair value measurements	$ 571