RETIREMENT PLANS - FAIR VALUE (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Pension plan assets at the fair value
Fair value measurements	$ 14,029	$ 13,094
Quoted Prices in Active Markets (Level 1)
Pension plan assets at the fair value
Fair value measurements	13,534	12,523
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	495	571	$ 0
Cash
Pension plan assets at the fair value
Fair value measurements	179	531
Cash | Quoted Prices in Active Markets (Level 1)
Pension plan assets at the fair value
Fair value measurements	179	531
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
U.S. treasury and government securities | Quoted Prices in Active Markets (Level 1)
Pension plan assets at the fair value
Fair value measurements		516
U.S. treasury and government securities | Significant Other Observable Inputs (Level 2)
Pension plan assets at the fair value
Fair value measurements		0
U.S. treasury and government securities | Significant Unobservable Inputs (Level 3)
Pension plan assets at the fair value
Fair value measurements		0
Fixed income exchange-traded funds
Pension plan assets at the fair value
Fair value measurements		1,872
Fixed income exchange-traded funds | Quoted Prices in Active Markets (Level 1)
Pension plan assets at the fair value
Fair value measurements		1,872
Fixed income exchange-traded funds | Significant Other Observable Inputs (Level 2)
Pension plan assets at the fair value
Fair value measurements		0
Fixed income exchange-traded funds | Significant Unobservable Inputs (Level 3)
Pension plan assets at the fair value
Fair value measurements		0
Preferred securities
Pension plan assets at the fair value
Fair value measurements	2,154	88
Preferred securities | Quoted Prices in Active Markets (Level 1)
Pension plan assets at the fair value
Fair value measurements	2,154	88
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	11,201	9,516
Equities | Quoted Prices in Active Markets (Level 1)
Pension plan assets at the fair value
Fair value measurements	11,201	9,516
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	495	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	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	0
Note receivable from an unrelated private company | Significant Unobservable Inputs (Level 3)
Pension plan assets at the fair value
Fair value measurements	$ 495	$ 571